Fix indentation for ktlint

Fix preferences import vulnerability

.github/DISCUSSION_TEMPLATE/questions.yml

@@ -1,6 +1,3 @@
-name: Question
-description: Ask about anything NewPipe-related
-labels: [question]
 body:
   - type: markdown
     attributes:

.github/workflows/ci.yml

@@ -36,8 +36,8 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: gradle/wrapper-validation-action@v1
+      - uses: actions/checkout@v4
+      - uses: gradle/wrapper-validation-action@v2
 
       - name: create and checkout branch
         # push events already checked out the branch
@@ -47,7 +47,7 @@ jobs:
         run: git checkout -B "$BRANCH"
 
       - name: set up JDK 17
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: "temurin"
@@ -57,7 +57,7 @@ jobs:
         run: ./gradlew assembleDebug lintDebug testDebugUnitTest --stacktrace -DskipFormatKtlint
 
       - name: Upload APK
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: app
           path: app/build/outputs/apk/debug/*.apk
@@ -80,10 +80,10 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: set up JDK 17
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: "temurin"
@@ -98,7 +98,7 @@ jobs:
           script: ./gradlew connectedCheck --stacktrace
 
       - name: Upload test report when tests fail # because the printed out stacktrace (console) is too short, see also #7553
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: android-test-report-api${{ matrix.api-level }}
@@ -111,19 +111,19 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
 
       - name: Set up JDK 17
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: "temurin"
           cache: 'gradle'
 
       - name: Cache SonarCloud packages
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ~/.sonar/cache
           key: ${{ runner.os }}-sonar

.github/workflows/image-minimizer.yml

@@ -17,9 +17,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: 16
 
@@ -27,7 +27,7 @@ jobs:
         run: npm i probe-image-size@7.2.3 --ignore-scripts
 
       - name: Minimize simple images
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         timeout-minutes: 3
         with:
           script: |

.github/workflows/pr-labeler.yml

@@ -1,5 +1,5 @@
 name: "PR size labeler"
-on: [pull_request]
+on: [pull_request_target]
 permissions:
   contents: read
   pull-requests: write

README.md

@@ -13,7 +13,7 @@
 <a href="https://github.com/TeamNewPipe/NewPipe/actions" alt="Build Status"><img src="https://github.com/TeamNewPipe/NewPipe/workflows/CI/badge.svg?branch=dev&event=push"></a>
 <a href="https://hosted.weblate.org/engage/newpipe/" alt="Translation Status"><img src="https://hosted.weblate.org/widgets/newpipe/-/svg-badge.svg"></a>
 <a href="https://web.libera.chat/#newpipe" alt="IRC channel: #newpipe"><img src="https://img.shields.io/badge/IRC%20chat-%23newpipe-brightgreen.svg"></a>
-<a href="https://matrix.to/#/#newpipe:libera.chat" alt="Matrix channel: #newpipe"><img src="https://img.shields.io/badge/Matrix%20chat-%23newpipe-blue"></a>
+<a href="https://matrix.to/#/#newpipe:matrix.newpipe-ev.de" alt="Matrix channel: #newpipe"><img src="https://img.shields.io/badge/Matrix%20chat-%23newpipe-blue"></a>
 </p>
 <hr>
 <p align="center"><a href="#screenshots">Screenshots</a> &bull; <a href="#supported-services">Supported Services</a> &bull; <a href="#description">Description</a> &bull; <a href="#features">Features</a> &bull; <a href="#installation-and-updates">Installation and updates</a> &bull; <a href="#contribution">Contribution</a> &bull; <a href="#donate">Donate</a> &bull; <a href="#license">License</a></p>
@@ -22,9 +22,10 @@
 
 *Read this document in other languages: [Deutsch](doc/README.de.md), [English](README.md), [Español](doc/README.es.md), [Français](doc/README.fr.md), [हिन्दी](doc/README.hi.md), [Italiano](doc/README.it.md), [한국어](doc/README.ko.md), [Português Brasil](doc/README.pt_BR.md), [Polski](doc/README.pl.md), [ਪੰਜਾਬੀ ](doc/README.pa.md), [日本語](doc/README.ja.md), [Română](doc/README.ro.md), [Soomaali](doc/README.so.md), [Türkçe](doc/README.tr.md), [正體中文](doc/README.zh_TW.md), [অসমীয়া](doc/README.asm.md), [Српски](doc/README.sr.md)*
 
-<b>WARNING: THIS APP IS IN BETA, SO YOU MAY ENCOUNTER BUGS. IF YOU DO, OPEN AN ISSUE IN OUR GITHUB REPOSITORY BY FILLING OUT THE ISSUE TEMPLATE.</b>
-
-<b>PUTTING NEWPIPE, OR ANY FORK OF IT, INTO THE GOOGLE PLAY STORE VIOLATES THEIR TERMS AND CONDITIONS.</b>
+> [!warning]
+> <b>THIS APP IS IN BETA, SO YOU MAY ENCOUNTER BUGS. IF YOU DO, OPEN AN ISSUE IN OUR GITHUB REPOSITORY BY FILLING OUT THE ISSUE TEMPLATE.</b>
+> 
+> <b>PUTTING NEWPIPE, OR ANY FORK OF IT, INTO THE GOOGLE PLAY STORE VIOLATES THEIR TERMS AND CONDITIONS.</b>
 
 ## Screenshots
 

app/build.gradle

@@ -12,7 +12,7 @@ plugins {
 }
 
 android {
-    compileSdk 33
+    compileSdk 34
     namespace 'org.schabi.newpipe'
 
     defaultConfig {
@@ -20,8 +20,8 @@ android {
         resValue "string", "app_name", "NewPipe"
         minSdk 21
         targetSdk 33
-        versionCode 996
-        versionName "0.26.1"
+        versionCode 997
+        versionName "0.27.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
 
@@ -98,7 +98,9 @@ android {
         resources {
             // remove two files which belong to jsoup
             // no idea how they ended up in the META-INF dir...
-            excludes += ['META-INF/README.md', 'META-INF/CHANGES']
+            excludes += ['META-INF/README.md', 'META-INF/CHANGES',
+                         // 'COPYRIGHT' belongs to RxJava...
+                         'META-INF/COPYRIGHT']
         }
     }
 }
@@ -106,9 +108,9 @@ android {
 ext {
     checkstyleVersion = '10.12.1'
 
-    androidxLifecycleVersion = '2.5.1'
-    androidxRoomVersion = '2.5.2'
-    androidxWorkVersion = '2.7.1'
+    androidxLifecycleVersion = '2.6.2'
+    androidxRoomVersion = '2.6.1'
+    androidxWorkVersion = '2.8.1'
 
     icepickVersion = '3.2.0'
     exoPlayerVersion = '2.18.7'
@@ -118,7 +120,6 @@ ext {
 
     leakCanaryVersion = '2.12'
     stethoVersion = '1.6.0'
-    mockitoVersion = '4.0.0'
 }
 
 configurations {
@@ -133,7 +134,7 @@ checkstyle {
     toolVersion = checkstyleVersion
 }
 
-task runCheckstyle(type: Checkstyle) {
+tasks.register('runCheckstyle', Checkstyle) {
     source 'src'
     include '**/*.java'
     exclude '**/gen/**'
@@ -154,7 +155,7 @@ task runCheckstyle(type: Checkstyle) {
 def outputDir = "${project.buildDir}/reports/ktlint/"
 def inputFiles = project.fileTree(dir: "src", include: "**/*.kt")
 
-task runKtlint(type: JavaExec) {
+tasks.register('runKtlint', JavaExec) {
     inputs.files(inputFiles)
     outputs.dir(outputDir)
     getMainClass().set("com.pinterest.ktlint.Main")
@@ -163,7 +164,7 @@ task runKtlint(type: JavaExec) {
     jvmArgs("--add-opens", "java.base/java.lang=ALL-UNNAMED")
 }
 
-task formatKtlint(type: JavaExec) {
+tasks.register('formatKtlint', JavaExec) {
     inputs.files(inputFiles)
     outputs.dir(outputDir)
     getMainClass().set("com.pinterest.ktlint.Main")
@@ -189,7 +190,7 @@ sonar {
 
 dependencies {
 /** Desugaring **/
-    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs_nio:2.0.3'
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs_nio:2.0.4'
 
 /** NewPipe libraries **/
     // You can use a local version by uncommenting a few lines in settings.gradle
@@ -197,7 +198,7 @@ dependencies {
     // name and the commit hash with the commit hash of the (pushed) commit you want to test
     // This works thanks to JitPack: https://jitpack.io/
     implementation 'com.github.TeamNewPipe:nanojson:1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751'
-    implementation 'com.github.TeamNewPipe:NewPipeExtractor:v0.23.1'
+    implementation 'com.github.TeamNewPipe:NewPipeExtractor:v0.24.0'
     implementation 'com.github.TeamNewPipe:NoNonsense-FilePicker:5.0.0'
 
 /** Checkstyle **/
@@ -208,28 +209,28 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:${kotlin_version}"
 
 /** AndroidX **/
-    implementation 'androidx.appcompat:appcompat:1.5.1'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
-    implementation 'androidx.core:core-ktx:1.10.0'
+    implementation 'androidx.core:core-ktx:1.12.0'
     implementation 'androidx.documentfile:documentfile:1.0.1'
-    implementation 'androidx.fragment:fragment-ktx:1.4.1'
+    implementation 'androidx.fragment:fragment-ktx:1.6.2'
     implementation "androidx.lifecycle:lifecycle-livedata-ktx:${androidxLifecycleVersion}"
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:${androidxLifecycleVersion}"
     implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.1.0'
-    implementation 'androidx.media:media:1.6.0'
-    implementation 'androidx.preference:preference:1.2.0'
-    implementation 'androidx.recyclerview:recyclerview:1.2.1'
+    implementation 'androidx.media:media:1.7.0'
+    implementation 'androidx.preference:preference:1.2.1'
+    implementation 'androidx.recyclerview:recyclerview:1.3.2'
     implementation "androidx.room:room-runtime:${androidxRoomVersion}"
     implementation "androidx.room:room-rxjava3:${androidxRoomVersion}"
     kapt "androidx.room:room-compiler:${androidxRoomVersion}"
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     // Newer version specified to prevent accessibility regressions with RecyclerView, see:
     // https://developer.android.com/jetpack/androidx/releases/viewpager2#1.1.0-alpha01
-    implementation 'androidx.viewpager2:viewpager2:1.1.0-beta01'
+    implementation 'androidx.viewpager2:viewpager2:1.1.0-beta02'
     implementation "androidx.work:work-runtime-ktx:${androidxWorkVersion}"
     implementation "androidx.work:work-rxjava3:${androidxWorkVersion}"
-    implementation 'com.google.android.material:material:1.9.0'
+    implementation 'com.google.android.material:material:1.11.0'
 
 /** Third-party libraries **/
     // Instance state boilerplate elimination
@@ -237,13 +238,10 @@ dependencies {
     kapt "frankiesardo:icepick-processor:${icepickVersion}"
 
     // HTML parser
-    implementation "org.jsoup:jsoup:1.16.1"
+    implementation "org.jsoup:jsoup:1.17.2"
 
     // HTTP client
-    implementation "com.squareup.okhttp3:okhttp:4.11.0"
-    // okhttp3:4.11.0 introduces a vulnerability from com.squareup.okio:okio@3.3.0,
-    // remove com.squareup.okio:okio when updating okhttp
-    implementation "com.squareup.okio:okio:3.4.0"
+    implementation "com.squareup.okhttp3:okhttp:4.12.0"
 
     // Media player
     implementation "com.google.android.exoplayer:exoplayer-core:${exoPlayerVersion}"
@@ -272,19 +270,19 @@ dependencies {
     implementation "io.noties.markwon:linkify:${markwonVersion}"
 
     // Crash reporting
-    implementation "ch.acra:acra-core:5.10.1"
+    implementation "ch.acra:acra-core:5.11.3"
 
     // Properly restarting
     implementation 'com.jakewharton:process-phoenix:2.1.2'
 
     // Reactive extensions for Java VM
-    implementation "io.reactivex.rxjava3:rxjava:3.1.6"
+    implementation "io.reactivex.rxjava3:rxjava:3.1.8"
     implementation "io.reactivex.rxjava3:rxandroid:3.0.2"
     // RxJava binding APIs for Android UI widgets
     implementation "com.jakewharton.rxbinding4:rxbinding:4.0.0"
 
     // Date and time formatting
-    implementation "org.ocpsoft.prettytime:prettytime:5.0.6.Final"
+    implementation "org.ocpsoft.prettytime:prettytime:5.0.7.Final"
 
 /** Debugging **/
     // Memory leak detection
@@ -297,13 +295,12 @@ dependencies {
 
 /** Testing **/
     testImplementation 'junit:junit:4.13.2'
-    testImplementation "org.mockito:mockito-core:${mockitoVersion}"
-    testImplementation "org.mockito:mockito-inline:${mockitoVersion}"
+    testImplementation 'org.mockito:mockito-core:5.6.0'
 
     androidTestImplementation "androidx.test.ext:junit:1.1.5"
     androidTestImplementation "androidx.test:runner:1.5.2"
     androidTestImplementation "androidx.room:room-testing:${androidxRoomVersion}"
-    androidTestImplementation "org.assertj:assertj-core:3.23.1"
+    androidTestImplementation "org.assertj:assertj-core:3.24.2"
 }
 
 static String getGitWorkingBranch() {

app/schemas/org.schabi.newpipe.database.AppDatabase/8.json

@@ -0,0 +1,737 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 8,
+    "identityHash": "012fc8e7ad3333f1597347f34e76a513",
+    "entities": [
+      {
+        "tableName": "subscriptions",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `service_id` INTEGER NOT NULL, `url` TEXT, `name` TEXT, `avatar_url` TEXT, `subscriber_count` INTEGER, `description` TEXT, `notification_mode` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "avatarUrl",
+            "columnName": "avatar_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "subscriberCount",
+            "columnName": "subscriber_count",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "notificationMode",
+            "columnName": "notification_mode",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_subscriptions_service_id_url",
+            "unique": true,
+            "columnNames": [
+              "service_id",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_subscriptions_service_id_url` ON `${TABLE_NAME}` (`service_id`, `url`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "search_history",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`creation_date` INTEGER, `service_id` INTEGER NOT NULL, `search` TEXT, `id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "creationDate",
+            "columnName": "creation_date",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "search",
+            "columnName": "search",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_search_history_search",
+            "unique": false,
+            "columnNames": [
+              "search"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_search_history_search` ON `${TABLE_NAME}` (`search`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "streams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `service_id` INTEGER NOT NULL, `url` TEXT NOT NULL, `title` TEXT NOT NULL, `stream_type` TEXT NOT NULL, `duration` INTEGER NOT NULL, `uploader` TEXT NOT NULL, `uploader_url` TEXT, `thumbnail_url` TEXT, `view_count` INTEGER, `textual_upload_date` TEXT, `upload_date` INTEGER, `is_upload_date_approximation` INTEGER)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "title",
+            "columnName": "title",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "streamType",
+            "columnName": "stream_type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "duration",
+            "columnName": "duration",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "uploader",
+            "columnName": "uploader",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "uploaderUrl",
+            "columnName": "uploader_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "thumbnailUrl",
+            "columnName": "thumbnail_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "viewCount",
+            "columnName": "view_count",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "textualUploadDate",
+            "columnName": "textual_upload_date",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "uploadDate",
+            "columnName": "upload_date",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "isUploadDateApproximation",
+            "columnName": "is_upload_date_approximation",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_streams_service_id_url",
+            "unique": true,
+            "columnNames": [
+              "service_id",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_streams_service_id_url` ON `${TABLE_NAME}` (`service_id`, `url`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "stream_history",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`stream_id` INTEGER NOT NULL, `access_date` INTEGER NOT NULL, `repeat_count` INTEGER NOT NULL, PRIMARY KEY(`stream_id`, `access_date`), FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "streamUid",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accessDate",
+            "columnName": "access_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "repeatCount",
+            "columnName": "repeat_count",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "stream_id",
+            "access_date"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_stream_history_stream_id",
+            "unique": false,
+            "columnNames": [
+              "stream_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_stream_history_stream_id` ON `${TABLE_NAME}` (`stream_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "stream_state",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`stream_id` INTEGER NOT NULL, `progress_time` INTEGER NOT NULL, PRIMARY KEY(`stream_id`), FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "streamUid",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "progressMillis",
+            "columnName": "progress_time",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "stream_id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": [
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "playlists",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT, `is_thumbnail_permanent` INTEGER NOT NULL, `thumbnail_stream_id` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "isThumbnailPermanent",
+            "columnName": "is_thumbnail_permanent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "thumbnailStreamId",
+            "columnName": "thumbnail_stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_playlists_name",
+            "unique": false,
+            "columnNames": [
+              "name"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_playlists_name` ON `${TABLE_NAME}` (`name`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "playlist_stream_join",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`playlist_id` INTEGER NOT NULL, `stream_id` INTEGER NOT NULL, `join_index` INTEGER NOT NULL, PRIMARY KEY(`playlist_id`, `join_index`), FOREIGN KEY(`playlist_id`) REFERENCES `playlists`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "playlistUid",
+            "columnName": "playlist_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "streamUid",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "index",
+            "columnName": "join_index",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "playlist_id",
+            "join_index"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_playlist_stream_join_playlist_id_join_index",
+            "unique": true,
+            "columnNames": [
+              "playlist_id",
+              "join_index"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_playlist_stream_join_playlist_id_join_index` ON `${TABLE_NAME}` (`playlist_id`, `join_index`)"
+          },
+          {
+            "name": "index_playlist_stream_join_stream_id",
+            "unique": false,
+            "columnNames": [
+              "stream_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_playlist_stream_join_stream_id` ON `${TABLE_NAME}` (`stream_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "playlists",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "playlist_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          },
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "remote_playlists",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `service_id` INTEGER NOT NULL, `name` TEXT, `url` TEXT, `thumbnail_url` TEXT, `uploader` TEXT, `stream_count` INTEGER)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "thumbnailUrl",
+            "columnName": "thumbnail_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "uploader",
+            "columnName": "uploader",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "streamCount",
+            "columnName": "stream_count",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_remote_playlists_name",
+            "unique": false,
+            "columnNames": [
+              "name"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_remote_playlists_name` ON `${TABLE_NAME}` (`name`)"
+          },
+          {
+            "name": "index_remote_playlists_service_id_url",
+            "unique": true,
+            "columnNames": [
+              "service_id",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_remote_playlists_service_id_url` ON `${TABLE_NAME}` (`service_id`, `url`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "feed",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`stream_id` INTEGER NOT NULL, `subscription_id` INTEGER NOT NULL, PRIMARY KEY(`stream_id`, `subscription_id`), FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, FOREIGN KEY(`subscription_id`) REFERENCES `subscriptions`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "streamId",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subscriptionId",
+            "columnName": "subscription_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "stream_id",
+            "subscription_id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_feed_subscription_id",
+            "unique": false,
+            "columnNames": [
+              "subscription_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_feed_subscription_id` ON `${TABLE_NAME}` (`subscription_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          },
+          {
+            "table": "subscriptions",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "subscription_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "feed_group",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `icon_id` INTEGER NOT NULL, `sort_order` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "icon",
+            "columnName": "icon_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sortOrder",
+            "columnName": "sort_order",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_feed_group_sort_order",
+            "unique": false,
+            "columnNames": [
+              "sort_order"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_feed_group_sort_order` ON `${TABLE_NAME}` (`sort_order`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "feed_group_subscription_join",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`group_id` INTEGER NOT NULL, `subscription_id` INTEGER NOT NULL, PRIMARY KEY(`group_id`, `subscription_id`), FOREIGN KEY(`group_id`) REFERENCES `feed_group`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, FOREIGN KEY(`subscription_id`) REFERENCES `subscriptions`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "feedGroupId",
+            "columnName": "group_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subscriptionId",
+            "columnName": "subscription_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "group_id",
+            "subscription_id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_feed_group_subscription_join_subscription_id",
+            "unique": false,
+            "columnNames": [
+              "subscription_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_feed_group_subscription_join_subscription_id` ON `${TABLE_NAME}` (`subscription_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "feed_group",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "group_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          },
+          {
+            "table": "subscriptions",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "subscription_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "feed_last_updated",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`subscription_id` INTEGER NOT NULL, `last_updated` INTEGER, PRIMARY KEY(`subscription_id`), FOREIGN KEY(`subscription_id`) REFERENCES `subscriptions`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "subscriptionId",
+            "columnName": "subscription_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastUpdated",
+            "columnName": "last_updated",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "subscription_id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": [
+          {
+            "table": "subscriptions",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "subscription_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '012fc8e7ad3333f1597347f34e76a513')"
+    ]
+  }
+}

app/schemas/org.schabi.newpipe.database.AppDatabase/9.json

@@ -0,0 +1,730 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 9,
+    "identityHash": "7591e8039faa74d8c0517dc867af9d3e",
+    "entities": [
+      {
+        "tableName": "subscriptions",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `service_id` INTEGER NOT NULL, `url` TEXT, `name` TEXT, `avatar_url` TEXT, `subscriber_count` INTEGER, `description` TEXT, `notification_mode` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "avatarUrl",
+            "columnName": "avatar_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "subscriberCount",
+            "columnName": "subscriber_count",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "notificationMode",
+            "columnName": "notification_mode",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_subscriptions_service_id_url",
+            "unique": true,
+            "columnNames": [
+              "service_id",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_subscriptions_service_id_url` ON `${TABLE_NAME}` (`service_id`, `url`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "search_history",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`creation_date` INTEGER, `service_id` INTEGER NOT NULL, `search` TEXT, `id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "creationDate",
+            "columnName": "creation_date",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "search",
+            "columnName": "search",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_search_history_search",
+            "unique": false,
+            "columnNames": [
+              "search"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_search_history_search` ON `${TABLE_NAME}` (`search`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "streams",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `service_id` INTEGER NOT NULL, `url` TEXT NOT NULL, `title` TEXT NOT NULL, `stream_type` TEXT NOT NULL, `duration` INTEGER NOT NULL, `uploader` TEXT NOT NULL, `uploader_url` TEXT, `thumbnail_url` TEXT, `view_count` INTEGER, `textual_upload_date` TEXT, `upload_date` INTEGER, `is_upload_date_approximation` INTEGER)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "title",
+            "columnName": "title",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "streamType",
+            "columnName": "stream_type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "duration",
+            "columnName": "duration",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "uploader",
+            "columnName": "uploader",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "uploaderUrl",
+            "columnName": "uploader_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "thumbnailUrl",
+            "columnName": "thumbnail_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "viewCount",
+            "columnName": "view_count",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "textualUploadDate",
+            "columnName": "textual_upload_date",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "uploadDate",
+            "columnName": "upload_date",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "isUploadDateApproximation",
+            "columnName": "is_upload_date_approximation",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_streams_service_id_url",
+            "unique": true,
+            "columnNames": [
+              "service_id",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_streams_service_id_url` ON `${TABLE_NAME}` (`service_id`, `url`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "stream_history",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`stream_id` INTEGER NOT NULL, `access_date` INTEGER NOT NULL, `repeat_count` INTEGER NOT NULL, PRIMARY KEY(`stream_id`, `access_date`), FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "streamUid",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accessDate",
+            "columnName": "access_date",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "repeatCount",
+            "columnName": "repeat_count",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "stream_id",
+            "access_date"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_stream_history_stream_id",
+            "unique": false,
+            "columnNames": [
+              "stream_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_stream_history_stream_id` ON `${TABLE_NAME}` (`stream_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "stream_state",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`stream_id` INTEGER NOT NULL, `progress_time` INTEGER NOT NULL, PRIMARY KEY(`stream_id`), FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "streamUid",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "progressMillis",
+            "columnName": "progress_time",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "stream_id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": [
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "playlists",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT, `is_thumbnail_permanent` INTEGER NOT NULL, `thumbnail_stream_id` INTEGER NOT NULL, `display_index` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "isThumbnailPermanent",
+            "columnName": "is_thumbnail_permanent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "thumbnailStreamId",
+            "columnName": "thumbnail_stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayIndex",
+            "columnName": "display_index",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "playlist_stream_join",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`playlist_id` INTEGER NOT NULL, `stream_id` INTEGER NOT NULL, `join_index` INTEGER NOT NULL, PRIMARY KEY(`playlist_id`, `join_index`), FOREIGN KEY(`playlist_id`) REFERENCES `playlists`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "playlistUid",
+            "columnName": "playlist_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "streamUid",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "index",
+            "columnName": "join_index",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "playlist_id",
+            "join_index"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_playlist_stream_join_playlist_id_join_index",
+            "unique": true,
+            "columnNames": [
+              "playlist_id",
+              "join_index"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_playlist_stream_join_playlist_id_join_index` ON `${TABLE_NAME}` (`playlist_id`, `join_index`)"
+          },
+          {
+            "name": "index_playlist_stream_join_stream_id",
+            "unique": false,
+            "columnNames": [
+              "stream_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_playlist_stream_join_stream_id` ON `${TABLE_NAME}` (`stream_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "playlists",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "playlist_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          },
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "remote_playlists",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `service_id` INTEGER NOT NULL, `name` TEXT, `url` TEXT, `thumbnail_url` TEXT, `uploader` TEXT, `display_index` INTEGER NOT NULL, `stream_count` INTEGER)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "service_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "thumbnailUrl",
+            "columnName": "thumbnail_url",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "uploader",
+            "columnName": "uploader",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "displayIndex",
+            "columnName": "display_index",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "streamCount",
+            "columnName": "stream_count",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_remote_playlists_service_id_url",
+            "unique": true,
+            "columnNames": [
+              "service_id",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_remote_playlists_service_id_url` ON `${TABLE_NAME}` (`service_id`, `url`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "feed",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`stream_id` INTEGER NOT NULL, `subscription_id` INTEGER NOT NULL, PRIMARY KEY(`stream_id`, `subscription_id`), FOREIGN KEY(`stream_id`) REFERENCES `streams`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, FOREIGN KEY(`subscription_id`) REFERENCES `subscriptions`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "streamId",
+            "columnName": "stream_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subscriptionId",
+            "columnName": "subscription_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "stream_id",
+            "subscription_id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_feed_subscription_id",
+            "unique": false,
+            "columnNames": [
+              "subscription_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_feed_subscription_id` ON `${TABLE_NAME}` (`subscription_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "streams",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "stream_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          },
+          {
+            "table": "subscriptions",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "subscription_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "feed_group",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `icon_id` INTEGER NOT NULL, `sort_order` INTEGER NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "uid",
+            "columnName": "uid",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "icon",
+            "columnName": "icon_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "sortOrder",
+            "columnName": "sort_order",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "uid"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_feed_group_sort_order",
+            "unique": false,
+            "columnNames": [
+              "sort_order"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_feed_group_sort_order` ON `${TABLE_NAME}` (`sort_order`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "feed_group_subscription_join",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`group_id` INTEGER NOT NULL, `subscription_id` INTEGER NOT NULL, PRIMARY KEY(`group_id`, `subscription_id`), FOREIGN KEY(`group_id`) REFERENCES `feed_group`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED, FOREIGN KEY(`subscription_id`) REFERENCES `subscriptions`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "feedGroupId",
+            "columnName": "group_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subscriptionId",
+            "columnName": "subscription_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "group_id",
+            "subscription_id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_feed_group_subscription_join_subscription_id",
+            "unique": false,
+            "columnNames": [
+              "subscription_id"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_feed_group_subscription_join_subscription_id` ON `${TABLE_NAME}` (`subscription_id`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "feed_group",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "group_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          },
+          {
+            "table": "subscriptions",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "subscription_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "feed_last_updated",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`subscription_id` INTEGER NOT NULL, `last_updated` INTEGER, PRIMARY KEY(`subscription_id`), FOREIGN KEY(`subscription_id`) REFERENCES `subscriptions`(`uid`) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED)",
+        "fields": [
+          {
+            "fieldPath": "subscriptionId",
+            "columnName": "subscription_id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastUpdated",
+            "columnName": "last_updated",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "subscription_id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": [
+          {
+            "table": "subscriptions",
+            "onDelete": "CASCADE",
+            "onUpdate": "CASCADE",
+            "columns": [
+              "subscription_id"
+            ],
+            "referencedColumns": [
+              "uid"
+            ]
+          }
+        ]
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '7591e8039faa74d8c0517dc867af9d3e')"
+    ]
+  }
+}

app/src/androidTest/java/org/schabi/newpipe/database/DatabaseMigrationTest.kt

@@ -8,10 +8,14 @@ import androidx.test.core.app.ApplicationProvider
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotEquals
 import org.junit.Assert.assertNull
 import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
+import org.schabi.newpipe.database.playlist.model.PlaylistEntity
+import org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity
+import org.schabi.newpipe.extractor.ServiceList
 import org.schabi.newpipe.extractor.stream.StreamType
 
 @RunWith(AndroidJUnit4::class)
@@ -20,13 +24,17 @@ class DatabaseMigrationTest {
         private const val DEFAULT_SERVICE_ID = 0
         private const val DEFAULT_URL = "https://www.youtube.com/watch?v=cDphUib5iG4"
         private const val DEFAULT_TITLE = "Test Title"
+        private const val DEFAULT_NAME = "Test Name"
         private val DEFAULT_TYPE = StreamType.VIDEO_STREAM
         private const val DEFAULT_DURATION = 480L
         private const val DEFAULT_UPLOADER_NAME = "Uploader Test"
         private const val DEFAULT_THUMBNAIL = "https://example.com/example.jpg"
 
-        private const val DEFAULT_SECOND_SERVICE_ID = 0
+        private const val DEFAULT_SECOND_SERVICE_ID = 1
         private const val DEFAULT_SECOND_URL = "https://www.youtube.com/watch?v=ncQU6iBn5Fc"
+
+        private const val DEFAULT_THIRD_SERVICE_ID = 2
+        private const val DEFAULT_THIRD_URL = "https://www.youtube.com/watch?v=dQw4w9WgXcQ"
     }
 
     @get:Rule
@@ -106,6 +114,20 @@ class DatabaseMigrationTest {
             Migrations.MIGRATION_6_7
         )
 
+        testHelper.runMigrationsAndValidate(
+            AppDatabase.DATABASE_NAME,
+            Migrations.DB_VER_8,
+            true,
+            Migrations.MIGRATION_7_8
+        )
+
+        testHelper.runMigrationsAndValidate(
+            AppDatabase.DATABASE_NAME,
+            Migrations.DB_VER_9,
+            true,
+            Migrations.MIGRATION_8_9
+        )
+
         val migratedDatabaseV3 = getMigratedDatabase()
         val listFromDB = migratedDatabaseV3.streamDAO().all.blockingFirst()
 
@@ -140,6 +162,157 @@ class DatabaseMigrationTest {
         assertNull(secondStreamFromMigratedDatabase.isUploadDateApproximation)
     }
 
+    @Test
+    fun migrateDatabaseFrom7to8() {
+        val databaseInV7 = testHelper.createDatabase(AppDatabase.DATABASE_NAME, Migrations.DB_VER_7)
+
+        val defaultSearch1 = " abc "
+        val defaultSearch2 = " abc"
+
+        val serviceId = DEFAULT_SERVICE_ID // YouTube
+        // Use id different to YouTube because two searches with the same query
+        // but different service are considered not equal.
+        val otherServiceId = ServiceList.SoundCloud.serviceId
+
+        databaseInV7.run {
+            insert(
+                "search_history", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("service_id", serviceId)
+                    put("search", defaultSearch1)
+                }
+            )
+            insert(
+                "search_history", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("service_id", serviceId)
+                    put("search", defaultSearch2)
+                }
+            )
+            insert(
+                "search_history", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("service_id", otherServiceId)
+                    put("search", defaultSearch1)
+                }
+            )
+            insert(
+                "search_history", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("service_id", otherServiceId)
+                    put("search", defaultSearch2)
+                }
+            )
+            close()
+        }
+
+        testHelper.runMigrationsAndValidate(
+            AppDatabase.DATABASE_NAME, Migrations.DB_VER_8,
+            true, Migrations.MIGRATION_7_8
+        )
+
+        testHelper.runMigrationsAndValidate(
+            AppDatabase.DATABASE_NAME, Migrations.DB_VER_9,
+            true, Migrations.MIGRATION_8_9
+        )
+
+        val migratedDatabaseV8 = getMigratedDatabase()
+        val listFromDB = migratedDatabaseV8.searchHistoryDAO().all.blockingFirst()
+
+        assertEquals(2, listFromDB.size)
+        assertEquals("abc", listFromDB[0].search)
+        assertEquals("abc", listFromDB[1].search)
+        assertNotEquals(listFromDB[0].serviceId, listFromDB[1].serviceId)
+    }
+
+    @Test
+    fun migrateDatabaseFrom8to9() {
+        val databaseInV8 = testHelper.createDatabase(AppDatabase.DATABASE_NAME, Migrations.DB_VER_8)
+
+        val localUid1: Long
+        val localUid2: Long
+        val remoteUid1: Long
+        val remoteUid2: Long
+        databaseInV8.run {
+            localUid1 = insert(
+                "playlists", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("name", DEFAULT_NAME + "1")
+                    put("is_thumbnail_permanent", false)
+                    put("thumbnail_stream_id", -1)
+                }
+            )
+            localUid2 = insert(
+                "playlists", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("name", DEFAULT_NAME + "2")
+                    put("is_thumbnail_permanent", false)
+                    put("thumbnail_stream_id", -1)
+                }
+            )
+            delete(
+                "playlists", "uid = ?",
+                Array(1) { localUid1 }
+            )
+            remoteUid1 = insert(
+                "remote_playlists", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("service_id", DEFAULT_SERVICE_ID)
+                    put("url", DEFAULT_URL)
+                }
+            )
+            remoteUid2 = insert(
+                "remote_playlists", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    put("service_id", DEFAULT_SECOND_SERVICE_ID)
+                    put("url", DEFAULT_SECOND_URL)
+                }
+            )
+            delete(
+                "remote_playlists", "uid = ?",
+                Array(1) { remoteUid2 }
+            )
+            close()
+        }
+
+        testHelper.runMigrationsAndValidate(
+            AppDatabase.DATABASE_NAME,
+            Migrations.DB_VER_9,
+            true,
+            Migrations.MIGRATION_8_9
+        )
+
+        val migratedDatabaseV9 = getMigratedDatabase()
+        var localListFromDB = migratedDatabaseV9.playlistDAO().all.blockingFirst()
+        var remoteListFromDB = migratedDatabaseV9.playlistRemoteDAO().all.blockingFirst()
+
+        assertEquals(1, localListFromDB.size)
+        assertEquals(localUid2, localListFromDB[0].uid)
+        assertEquals(-1, localListFromDB[0].displayIndex)
+        assertEquals(1, remoteListFromDB.size)
+        assertEquals(remoteUid1, remoteListFromDB[0].uid)
+        assertEquals(-1, remoteListFromDB[0].displayIndex)
+
+        val localUid3 = migratedDatabaseV9.playlistDAO().insert(
+            PlaylistEntity(DEFAULT_NAME + "3", false, -1, -1)
+        )
+        val remoteUid3 = migratedDatabaseV9.playlistRemoteDAO().insert(
+            PlaylistRemoteEntity(
+                DEFAULT_THIRD_SERVICE_ID, DEFAULT_NAME, DEFAULT_THIRD_URL,
+                DEFAULT_THUMBNAIL, DEFAULT_UPLOADER_NAME, -1, 10
+            )
+        )
+
+        localListFromDB = migratedDatabaseV9.playlistDAO().all.blockingFirst()
+        remoteListFromDB = migratedDatabaseV9.playlistRemoteDAO().all.blockingFirst()
+        assertEquals(2, localListFromDB.size)
+        assertEquals(localUid3, localListFromDB[1].uid)
+        assertEquals(-1, localListFromDB[1].displayIndex)
+        assertEquals(2, remoteListFromDB.size)
+        assertEquals(remoteUid3, remoteListFromDB[1].uid)
+        assertEquals(-1, remoteListFromDB[1].displayIndex)
+    }
+
     private fun getMigratedDatabase(): AppDatabase {
         val database: AppDatabase = Room.databaseBuilder(
             ApplicationProvider.getApplicationContext(),

app/src/androidTest/java/org/schabi/newpipe/database/FeedDAOTest.kt

@@ -85,7 +85,13 @@ class FeedDAOTest {
 
     private fun assertEqual(streams: List<StreamWithState>?, allowedStreams: List<StreamEntity>) {
         assertNotNull(streams)
-        assertEquals(allowedStreams, streams!!.stream().map { it.stream }.toList().sortedBy { it.uid })
+        assertEquals(
+            allowedStreams,
+            streams!!
+                .map { it.stream }
+                .sortedBy { it.uid }
+                .toList()
+        )
     }
 
     private fun setupUnlinkDelete(time: String) {

app/src/main/java/androidx/fragment/app/FragmentStatePagerAdapterMenuWorkaround.java

@@ -25,6 +25,7 @@ import android.view.ViewGroup;
 import androidx.annotation.IntDef;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.os.BundleCompat;
 import androidx.lifecycle.Lifecycle;
 import androidx.viewpager.widget.PagerAdapter;
 
@@ -284,7 +285,7 @@ public abstract class FragmentStatePagerAdapterMenuWorkaround extends PagerAdapt
         Bundle state = null;
         if (!mSavedState.isEmpty()) {
             state = new Bundle();
-            state.putParcelableArray("states", mSavedState.toArray(new Fragment.SavedState[0]));
+            state.putParcelableArrayList("states", mSavedState);
         }
         for (int i = 0; i < mFragments.size(); i++) {
             final Fragment f = mFragments.get(i);
@@ -311,13 +312,12 @@ public abstract class FragmentStatePagerAdapterMenuWorkaround extends PagerAdapt
         if (state != null) {
             final Bundle bundle = (Bundle) state;
             bundle.setClassLoader(loader);
-            final Parcelable[] fss = bundle.getParcelableArray("states");
+            final var states = BundleCompat.getParcelableArrayList(bundle, "states",
+                    Fragment.SavedState.class);
             mSavedState.clear();
             mFragments.clear();
-            if (fss != null) {
-                for (final Parcelable parcelable : fss) {
-                    mSavedState.add((Fragment.SavedState) parcelable);
-                }
+            if (states != null) {
+                mSavedState.addAll(states);
             }
             final Iterable<String> keys = bundle.keySet();
             for (final String key : keys) {

app/src/main/java/org/schabi/newpipe/App.java

@@ -60,6 +60,8 @@ import io.reactivex.rxjava3.plugins.RxJavaPlugins;
 public class App extends Application {
     public static final String PACKAGE_NAME = BuildConfig.APPLICATION_ID;
     private static final String TAG = App.class.toString();
+
+    private boolean isFirstRun = false;
     private static App app;
 
     @NonNull
@@ -85,7 +87,13 @@ public class App extends Application {
             return;
         }
 
-        // Initialize settings first because others inits can use its values
+        // check if the last used preference version is set
+        // to determine whether this is the first app run
+        final int lastUsedPrefVersion = PreferenceManager.getDefaultSharedPreferences(this)
+                .getInt(getString(R.string.last_used_preferences_version), -1);
+        isFirstRun = lastUsedPrefVersion == -1;
+
+        // Initialize settings first because other initializations can use its values
         NewPipeSettings.initSettings(this);
 
         NewPipe.init(getDownloader(),
@@ -255,4 +263,7 @@ public class App extends Application {
         return false;
     }
 
+    public boolean isFirstRun() {
+        return isFirstRun;
+    }
 }

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -44,6 +44,7 @@ import android.widget.FrameLayout;
 import android.widget.Spinner;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatActivity;
@@ -51,6 +52,7 @@ import androidx.core.app.ActivityCompat;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentContainerView;
 import androidx.fragment.app.FragmentManager;
 import androidx.preference.PreferenceManager;
 
@@ -64,17 +66,20 @@ import org.schabi.newpipe.databinding.ToolbarLayoutBinding;
 import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.services.peertube.PeertubeInstance;
 import org.schabi.newpipe.fragments.BackPressable;
 import org.schabi.newpipe.fragments.MainFragment;
 import org.schabi.newpipe.fragments.detail.VideoDetailFragment;
+import org.schabi.newpipe.fragments.list.comments.CommentRepliesFragment;
 import org.schabi.newpipe.fragments.list.search.SearchFragment;
 import org.schabi.newpipe.local.feed.notifications.NotificationWorker;
 import org.schabi.newpipe.player.Player;
 import org.schabi.newpipe.player.event.OnKeyDownListener;
 import org.schabi.newpipe.player.helper.PlayerHolder;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
+import org.schabi.newpipe.settings.UpdateSettingsFragment;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.KioskTranslator;
@@ -82,6 +87,7 @@ import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.PeertubeHelper;
 import org.schabi.newpipe.util.PermissionHelper;
+import org.schabi.newpipe.util.ReleaseVersionUtil;
 import org.schabi.newpipe.util.SerializedCache;
 import org.schabi.newpipe.util.ServiceHelper;
 import org.schabi.newpipe.util.StateSaver;
@@ -163,6 +169,11 @@ public class MainActivity extends AppCompatActivity {
             // if this is enabled by the user.
             NotificationWorker.initialize(this);
         }
+        if (!UpdateSettingsFragment.wasUserAskedForConsent(this)
+                && !App.getApp().isFirstRun()
+                && ReleaseVersionUtil.INSTANCE.isReleaseApk()) {
+            UpdateSettingsFragment.askForConsentToUpdateChecks(this);
+        }
     }
 
     @Override
@@ -172,7 +183,8 @@ public class MainActivity extends AppCompatActivity {
         final App app = App.getApp();
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(app);
 
-        if (prefs.getBoolean(app.getString(R.string.update_app_key), true)) {
+        if (prefs.getBoolean(app.getString(R.string.update_app_key), false)
+                && prefs.getBoolean(app.getString(R.string.update_check_consent_key), false)) {
             // Start the worker which is checking all conditions
             // and eventually searching for a new version.
             NewVersionWorker.enqueueNewVersionCheckingWork(app, false);
@@ -546,14 +558,21 @@ public class MainActivity extends AppCompatActivity {
         // interacts with a fragment inside fragment_holder so all back presses should be
         // handled by it
         if (bottomSheetHiddenOrCollapsed()) {
-            final Fragment fragment = getSupportFragmentManager()
-                    .findFragmentById(R.id.fragment_holder);
+            final FragmentManager fm = getSupportFragmentManager();
+            final Fragment fragment = fm.findFragmentById(R.id.fragment_holder);
             // If current fragment implements BackPressable (i.e. can/wanna handle back press)
             // delegate the back press to it
             if (fragment instanceof BackPressable) {
                 if (((BackPressable) fragment).onBackPressed()) {
                     return;
                 }
+            } else if (fragment instanceof CommentRepliesFragment) {
+                // expand DetailsFragment if CommentRepliesFragment was opened
+                // to show the top level comments again
+                // Expand DetailsFragment if CommentRepliesFragment was opened
+                // and no other CommentRepliesFragments are on top of the back stack
+                // to show the top level comments again.
+                openDetailFragmentFromCommentReplies(fm, false);
             }
 
         } else {
@@ -629,10 +648,17 @@ public class MainActivity extends AppCompatActivity {
      * </pre>
      */
     private void onHomeButtonPressed() {
-        // If search fragment wasn't found in the backstack...
-        if (!NavigationHelper.tryGotoSearchFragment(getSupportFragmentManager())) {
-            // ...go to the main fragment
-            NavigationHelper.gotoMainFragment(getSupportFragmentManager());
+        final FragmentManager fm = getSupportFragmentManager();
+        final Fragment fragment = fm.findFragmentById(R.id.fragment_holder);
+
+        if (fragment instanceof CommentRepliesFragment) {
+            // Expand DetailsFragment if CommentRepliesFragment was opened
+            // and no other CommentRepliesFragments are on top of the back stack
+            // to show the top level comments again.
+            openDetailFragmentFromCommentReplies(fm, true);
+        } else if (!NavigationHelper.tryGotoSearchFragment(fm)) {
+            // If search fragment wasn't found in the backstack go to the main fragment
+            NavigationHelper.gotoMainFragment(fm);
         }
     }
 
@@ -828,6 +854,68 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
+    private void openDetailFragmentFromCommentReplies(
+            @NonNull final FragmentManager fm,
+            final boolean popBackStack
+    ) {
+        // obtain the name of the fragment under the replies fragment that's going to be popped
+        @Nullable final String fragmentUnderEntryName;
+        if (fm.getBackStackEntryCount() < 2) {
+            fragmentUnderEntryName = null;
+        } else {
+            fragmentUnderEntryName = fm.getBackStackEntryAt(fm.getBackStackEntryCount() - 2)
+                    .getName();
+        }
+
+        // the root comment is the comment for which the user opened the replies page
+        @Nullable final CommentRepliesFragment repliesFragment =
+                (CommentRepliesFragment) fm.findFragmentByTag(CommentRepliesFragment.TAG);
+        @Nullable final CommentsInfoItem rootComment =
+                repliesFragment == null ? null : repliesFragment.getCommentsInfoItem();
+
+        // sometimes this function pops the backstack, other times it's handled by the system
+        if (popBackStack) {
+            fm.popBackStackImmediate();
+        }
+
+        // only expand the bottom sheet back if there are no more nested comment replies fragments
+        // stacked under the one that is currently being popped
+        if (CommentRepliesFragment.TAG.equals(fragmentUnderEntryName)) {
+            return;
+        }
+
+        final BottomSheetBehavior<FragmentContainerView> behavior = BottomSheetBehavior
+                .from(mainBinding.fragmentPlayerHolder);
+        // do not return to the comment if the details fragment was closed
+        if (behavior.getState() == BottomSheetBehavior.STATE_HIDDEN) {
+            return;
+        }
+
+        // scroll to the root comment once the bottom sheet expansion animation is finished
+        behavior.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
+            @Override
+            public void onStateChanged(@NonNull final View bottomSheet,
+                                       final int newState) {
+                if (newState == BottomSheetBehavior.STATE_EXPANDED) {
+                    final Fragment detailFragment = fm.findFragmentById(
+                            R.id.fragment_player_holder);
+                    if (detailFragment instanceof VideoDetailFragment && rootComment != null) {
+                        // should always be the case
+                        ((VideoDetailFragment) detailFragment).scrollToComment(rootComment);
+                    }
+                    behavior.removeBottomSheetCallback(this);
+                }
+            }
+
+            @Override
+            public void onSlide(@NonNull final View bottomSheet, final float slideOffset) {
+                // not needed, listener is removed once the sheet is expanded
+            }
+        });
+
+        behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
+    }
+
     private boolean bottomSheetHiddenOrCollapsed() {
         final BottomSheetBehavior<FrameLayout> bottomSheetBehavior =
                 BottomSheetBehavior.from(mainBinding.fragmentPlayerHolder);

app/src/main/java/org/schabi/newpipe/NewPipeDatabase.java

@@ -7,6 +7,8 @@ import static org.schabi.newpipe.database.Migrations.MIGRATION_3_4;
 import static org.schabi.newpipe.database.Migrations.MIGRATION_4_5;
 import static org.schabi.newpipe.database.Migrations.MIGRATION_5_6;
 import static org.schabi.newpipe.database.Migrations.MIGRATION_6_7;
+import static org.schabi.newpipe.database.Migrations.MIGRATION_7_8;
+import static org.schabi.newpipe.database.Migrations.MIGRATION_8_9;
 
 import android.content.Context;
 import android.database.Cursor;
@@ -27,7 +29,7 @@ public final class NewPipeDatabase {
         return Room
                 .databaseBuilder(context.getApplicationContext(), AppDatabase.class, DATABASE_NAME)
                 .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5,
-                        MIGRATION_5_6, MIGRATION_6_7)
+                        MIGRATION_5_6, MIGRATION_6_7, MIGRATION_7_8, MIGRATION_8_9)
                 .build();
     }
 

app/src/main/java/org/schabi/newpipe/NewVersionWorker.kt

@@ -20,9 +20,7 @@ import com.grack.nanojson.JsonParser
 import com.grack.nanojson.JsonParserException
 import org.schabi.newpipe.extractor.downloader.Response
 import org.schabi.newpipe.extractor.exceptions.ReCaptchaException
-import org.schabi.newpipe.util.ReleaseVersionUtil.coerceUpdateCheckExpiry
-import org.schabi.newpipe.util.ReleaseVersionUtil.isLastUpdateCheckExpired
-import org.schabi.newpipe.util.ReleaseVersionUtil.isReleaseApk
+import org.schabi.newpipe.util.ReleaseVersionUtil
 import java.io.IOException
 
 class NewVersionWorker(
@@ -84,7 +82,7 @@ class NewVersionWorker(
     @Throws(IOException::class, ReCaptchaException::class)
     private fun checkNewVersion() {
         // Check if the current apk is a github one or not.
-        if (!isReleaseApk()) {
+        if (!ReleaseVersionUtil.isReleaseApk) {
             return
         }
 
@@ -93,7 +91,7 @@ class NewVersionWorker(
             // Check if the last request has happened a certain time ago
             // to reduce the number of API requests.
             val expiry = prefs.getLong(applicationContext.getString(R.string.update_expiry_key), 0)
-            if (!isLastUpdateCheckExpired(expiry)) {
+            if (!ReleaseVersionUtil.isLastUpdateCheckExpired(expiry)) {
                 return
             }
         }
@@ -108,7 +106,7 @@ class NewVersionWorker(
         try {
             // Store a timestamp which needs to be exceeded,
             // before a new request to the API is made.
-            val newExpiry = coerceUpdateCheckExpiry(response.getHeader("expires"))
+            val newExpiry = ReleaseVersionUtil.coerceUpdateCheckExpiry(response.getHeader("expires"))
             prefs.edit {
                 putLong(applicationContext.getString(R.string.update_expiry_key), newExpiry)
             }

app/src/main/java/org/schabi/newpipe/about/AboutActivity.kt

@@ -116,7 +116,7 @@ class AboutActivity : AppCompatActivity() {
         /**
          * List of all software components.
          */
-        private val SOFTWARE_COMPONENTS = arrayOf(
+        private val SOFTWARE_COMPONENTS = arrayListOf(
             SoftwareComponent(
                 "ACRA", "2013", "Kevin Gaudin",
                 "https://github.com/ACRA/acra", StandardLicenses.APACHE2

app/src/main/java/org/schabi/newpipe/about/LicenseFragment.kt

@@ -18,6 +18,7 @@ import org.schabi.newpipe.BuildConfig
 import org.schabi.newpipe.R
 import org.schabi.newpipe.databinding.FragmentLicensesBinding
 import org.schabi.newpipe.databinding.ItemSoftwareComponentBinding
+import org.schabi.newpipe.ktx.parcelableArrayList
 import org.schabi.newpipe.util.Localization
 import org.schabi.newpipe.util.external_communication.ShareUtils
 
@@ -25,16 +26,15 @@ import org.schabi.newpipe.util.external_communication.ShareUtils
  * Fragment containing the software licenses.
  */
 class LicenseFragment : Fragment() {
-    private lateinit var softwareComponents: Array<SoftwareComponent>
+    private lateinit var softwareComponents: List<SoftwareComponent>
     private var activeSoftwareComponent: SoftwareComponent? = null
     private val compositeDisposable = CompositeDisposable()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        softwareComponents = arguments?.getParcelableArray(ARG_COMPONENTS) as Array<SoftwareComponent>
+        softwareComponents = arguments?.parcelableArrayList<SoftwareComponent>(ARG_COMPONENTS)!!
+            .sortedBy { it.name } // Sort components by name
         activeSoftwareComponent = savedInstanceState?.getSerializable(SOFTWARE_COMPONENT_KEY) as? SoftwareComponent
-        // Sort components by name
-        softwareComponents.sortBy { it.name }
     }
 
     override fun onDestroy() {
@@ -130,7 +130,8 @@ class LicenseFragment : Fragment() {
             StandardLicenses.GPL3,
             BuildConfig.VERSION_NAME
         )
-        fun newInstance(softwareComponents: Array<SoftwareComponent>): LicenseFragment {
+
+        fun newInstance(softwareComponents: ArrayList<SoftwareComponent>): LicenseFragment {
             val fragment = LicenseFragment()
             fragment.arguments = bundleOf(ARG_COMPONENTS to softwareComponents)
             return fragment

app/src/main/java/org/schabi/newpipe/database/AppDatabase.java

@@ -1,6 +1,6 @@
 package org.schabi.newpipe.database;
 
-import static org.schabi.newpipe.database.Migrations.DB_VER_7;
+import static org.schabi.newpipe.database.Migrations.DB_VER_9;
 
 import androidx.room.Database;
 import androidx.room.RoomDatabase;
@@ -38,7 +38,7 @@ import org.schabi.newpipe.database.subscription.SubscriptionEntity;
                 FeedEntity.class, FeedGroupEntity.class, FeedGroupSubscriptionEntity.class,
                 FeedLastUpdatedEntity.class
         },
-        version = DB_VER_7
+        version = DB_VER_9
 )
 public abstract class AppDatabase extends RoomDatabase {
     public static final String DATABASE_NAME = "newpipe.db";

app/src/main/java/org/schabi/newpipe/database/Converters.kt

@@ -7,7 +7,7 @@ import java.time.Instant
 import java.time.OffsetDateTime
 import java.time.ZoneOffset
 
-object Converters {
+class Converters {
     /**
      * Convert a long value to a [OffsetDateTime].
      *
@@ -47,6 +47,6 @@ object Converters {
 
     @TypeConverter
     fun feedGroupIconOf(id: Int): FeedGroupIcon {
-        return FeedGroupIcon.values().first { it.id == id }
+        return FeedGroupIcon.entries.first { it.id == id }
     }
 }

app/src/main/java/org/schabi/newpipe/database/Migrations.java

@@ -25,6 +25,8 @@ public final class Migrations {
     public static final int DB_VER_5 = 5;
     public static final int DB_VER_6 = 6;
     public static final int DB_VER_7 = 7;
+    public static final int DB_VER_8 = 8;
+    public static final int DB_VER_9 = 9;
 
     private static final String TAG = Migrations.class.getName();
     public static final boolean DEBUG = MainActivity.DEBUG;
@@ -186,7 +188,7 @@ public final class Migrations {
         @Override
         public void migrate(@NonNull final SupportSQLiteDatabase database) {
             database.execSQL("ALTER TABLE `subscriptions` ADD COLUMN `notification_mode` "
-                     + "INTEGER NOT NULL DEFAULT 0");
+                    + "INTEGER NOT NULL DEFAULT 0");
         }
     };
 
@@ -235,6 +237,71 @@ public final class Migrations {
         }
     };
 
+    public static final Migration MIGRATION_7_8 = new Migration(DB_VER_7, DB_VER_8) {
+        @Override
+        public void migrate(@NonNull final SupportSQLiteDatabase database) {
+            database.execSQL("DELETE FROM search_history WHERE id NOT IN (SELECT id FROM (SELECT "
+                    + "MIN(id) as id FROM search_history GROUP BY trim(search), service_id ) tmp)");
+            database.execSQL("UPDATE search_history SET search = trim(search)");
+        }
+    };
+
+    public static final Migration MIGRATION_8_9 = new Migration(DB_VER_8, DB_VER_9) {
+        @Override
+        public void migrate(@NonNull final SupportSQLiteDatabase database) {
+            try {
+                database.beginTransaction();
+
+                // Update playlists.
+                // Create a temp table to initialize display_index.
+                database.execSQL("CREATE TABLE `playlists_tmp` "
+                        + "(`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "
+                        + "`name` TEXT, `is_thumbnail_permanent` INTEGER NOT NULL, "
+                        + "`thumbnail_stream_id` INTEGER NOT NULL, "
+                        + "`display_index` INTEGER NOT NULL)");
+                database.execSQL("INSERT INTO `playlists_tmp` "
+                        + "(`uid`, `name`, `is_thumbnail_permanent`, `thumbnail_stream_id`, "
+                        + "`display_index`) "
+                        + "SELECT `uid`, `name`, `is_thumbnail_permanent`, `thumbnail_stream_id`, "
+                        + "-1 "
+                        + "FROM `playlists`");
+
+                // Replace the old table, note that this also removes the index on the name which
+                // we don't need anymore.
+                database.execSQL("DROP TABLE `playlists`");
+                database.execSQL("ALTER TABLE `playlists_tmp` RENAME TO `playlists`");
+
+
+                // Update remote_playlists.
+                // Create a temp table to initialize display_index.
+                database.execSQL("CREATE TABLE `remote_playlists_tmp` "
+                        + "(`uid` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "
+                        + "`service_id` INTEGER NOT NULL, `name` TEXT, `url` TEXT, "
+                        + "`thumbnail_url` TEXT, `uploader` TEXT, "
+                        + "`display_index` INTEGER NOT NULL,"
+                        + "`stream_count` INTEGER)");
+                database.execSQL("INSERT INTO `remote_playlists_tmp` (`uid`, `service_id`, "
+                        + "`name`, `url`, `thumbnail_url`, `uploader`, `display_index`, "
+                        + "`stream_count`)"
+                        + "SELECT `uid`, `service_id`, `name`, `url`, `thumbnail_url`, `uploader`, "
+                        + "-1, `stream_count` FROM `remote_playlists`");
+
+                // Replace the old table, note that this also removes the index on the name which
+                // we don't need anymore.
+                database.execSQL("DROP TABLE `remote_playlists`");
+                database.execSQL("ALTER TABLE `remote_playlists_tmp` RENAME TO `remote_playlists`");
+
+                // Create index on the new table.
+                database.execSQL("CREATE UNIQUE INDEX `index_remote_playlists_service_id_url` "
+                        + "ON `remote_playlists` (`service_id`, `url`)");
+
+                database.setTransactionSuccessful();
+            } finally {
+                database.endTransaction();
+            }
+        }
+    };
+
     private Migrations() {
     }
 }

app/src/main/java/org/schabi/newpipe/database/playlist/PlaylistDuplicatesEntry.java

@@ -13,12 +13,17 @@ public class PlaylistDuplicatesEntry extends PlaylistMetadataEntry {
     @ColumnInfo(name = PLAYLIST_TIMES_STREAM_IS_CONTAINED)
     public final long timesStreamIsContained;
 
+    @SuppressWarnings("checkstyle:ParameterNumber")
     public PlaylistDuplicatesEntry(final long uid,
                                    final String name,
                                    final String thumbnailUrl,
+                                   final boolean isThumbnailPermanent,
+                                   final long thumbnailStreamId,
+                                   final long displayIndex,
                                    final long streamCount,
                                    final long timesStreamIsContained) {
-        super(uid, name, thumbnailUrl, streamCount);
+        super(uid, name, thumbnailUrl, isThumbnailPermanent, thumbnailStreamId, displayIndex,
+                streamCount);
         this.timesStreamIsContained = timesStreamIsContained;
     }
 }

app/src/main/java/org/schabi/newpipe/database/playlist/PlaylistLocalItem.java

@@ -1,22 +1,13 @@
 package org.schabi.newpipe.database.playlist;
 
 import org.schabi.newpipe.database.LocalItem;
-import org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity;
-
-import java.util.Comparator;
-import java.util.List;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 public interface PlaylistLocalItem extends LocalItem {
     String getOrderingName();
 
-    static List<PlaylistLocalItem> merge(
-            final List<PlaylistMetadataEntry> localPlaylists,
-            final List<PlaylistRemoteEntity> remotePlaylists) {
-        return Stream.concat(localPlaylists.stream(), remotePlaylists.stream())
-                .sorted(Comparator.comparing(PlaylistLocalItem::getOrderingName,
-                        Comparator.nullsLast(String.CASE_INSENSITIVE_ORDER)))
-                .collect(Collectors.toList());
-    }
+    long getDisplayIndex();
+
+    long getUid();
+
+    void setDisplayIndex(long displayIndex);
 }

app/src/main/java/org/schabi/newpipe/database/playlist/PlaylistMetadataEntry.java

@@ -2,27 +2,40 @@ package org.schabi.newpipe.database.playlist;
 
 import androidx.room.ColumnInfo;
 
+import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_DISPLAY_INDEX;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_NAME;
+import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_THUMBNAIL_PERMANENT;
+import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_THUMBNAIL_STREAM_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_THUMBNAIL_URL;
 
 public class PlaylistMetadataEntry implements PlaylistLocalItem {
     public static final String PLAYLIST_STREAM_COUNT = "streamCount";
 
     @ColumnInfo(name = PLAYLIST_ID)
-    public final long uid;
+    private final long uid;
     @ColumnInfo(name = PLAYLIST_NAME)
     public final String name;
+    @ColumnInfo(name = PLAYLIST_THUMBNAIL_PERMANENT)
+    private final boolean isThumbnailPermanent;
+    @ColumnInfo(name = PLAYLIST_THUMBNAIL_STREAM_ID)
+    private final long thumbnailStreamId;
     @ColumnInfo(name = PLAYLIST_THUMBNAIL_URL)
     public final String thumbnailUrl;
+    @ColumnInfo(name = PLAYLIST_DISPLAY_INDEX)
+    private long displayIndex;
     @ColumnInfo(name = PLAYLIST_STREAM_COUNT)
     public final long streamCount;
 
     public PlaylistMetadataEntry(final long uid, final String name, final String thumbnailUrl,
-                                 final long streamCount) {
+                                 final boolean isThumbnailPermanent, final long thumbnailStreamId,
+                                 final long displayIndex, final long streamCount) {
         this.uid = uid;
         this.name = name;
         this.thumbnailUrl = thumbnailUrl;
+        this.isThumbnailPermanent = isThumbnailPermanent;
+        this.thumbnailStreamId = thumbnailStreamId;
+        this.displayIndex = displayIndex;
         this.streamCount = streamCount;
     }
 
@@ -35,4 +48,27 @@ public class PlaylistMetadataEntry implements PlaylistLocalItem {
     public String getOrderingName() {
         return name;
     }
+
+    public boolean isThumbnailPermanent() {
+        return isThumbnailPermanent;
+    }
+
+    public long getThumbnailStreamId() {
+        return thumbnailStreamId;
+    }
+
+    @Override
+    public long getDisplayIndex() {
+        return displayIndex;
+    }
+
+    @Override
+    public long getUid() {
+        return uid;
+    }
+
+    @Override
+    public void setDisplayIndex(final long displayIndex) {
+        this.displayIndex = displayIndex;
+    }
 }

app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistDAO.java

@@ -2,6 +2,7 @@ package org.schabi.newpipe.database.playlist.dao;
 
 import androidx.room.Dao;
 import androidx.room.Query;
+import androidx.room.Transaction;
 
 import org.schabi.newpipe.database.BasicDAO;
 import org.schabi.newpipe.database.playlist.model.PlaylistEntity;
@@ -36,4 +37,17 @@ public interface PlaylistDAO extends BasicDAO<PlaylistEntity> {
 
     @Query("SELECT COUNT(*) FROM " + PLAYLIST_TABLE)
     Flowable<Long> getCount();
+
+    @Transaction
+    default long upsertPlaylist(final PlaylistEntity playlist) {
+        final long playlistId = playlist.getUid();
+
+        if (playlistId == -1) {
+            // This situation is probably impossible.
+            return insert(playlist);
+        } else {
+            update(playlist);
+            return playlistId;
+        }
+    }
 }

app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistRemoteDAO.java

@@ -11,6 +11,7 @@ import java.util.List;
 
 import io.reactivex.rxjava3.core.Flowable;
 
+import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.REMOTE_PLAYLIST_DISPLAY_INDEX;
 import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.REMOTE_PLAYLIST_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.REMOTE_PLAYLIST_SERVICE_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.REMOTE_PLAYLIST_TABLE;
@@ -31,10 +32,18 @@ public interface PlaylistRemoteDAO extends BasicDAO<PlaylistRemoteEntity> {
             + " WHERE " + REMOTE_PLAYLIST_SERVICE_ID + " = :serviceId")
     Flowable<List<PlaylistRemoteEntity>> listByService(int serviceId);
 
+    @Query("SELECT * FROM " + REMOTE_PLAYLIST_TABLE + " WHERE "
+            + REMOTE_PLAYLIST_ID + " = :playlistId")
+    Flowable<List<PlaylistRemoteEntity>> getPlaylist(long playlistId);
+
     @Query("SELECT * FROM " + REMOTE_PLAYLIST_TABLE + " WHERE "
             + REMOTE_PLAYLIST_URL + " = :url AND " + REMOTE_PLAYLIST_SERVICE_ID + " = :serviceId")
     Flowable<List<PlaylistRemoteEntity>> getPlaylist(long serviceId, String url);
 
+    @Query("SELECT * FROM " + REMOTE_PLAYLIST_TABLE
+     + " ORDER BY " + REMOTE_PLAYLIST_DISPLAY_INDEX)
+    Flowable<List<PlaylistRemoteEntity>> getPlaylists();
+
     @Query("SELECT " + REMOTE_PLAYLIST_ID + " FROM " + REMOTE_PLAYLIST_TABLE
             + " WHERE " + REMOTE_PLAYLIST_URL + " = :url "
             + "AND " + REMOTE_PLAYLIST_SERVICE_ID + " = :serviceId")

app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistStreamDAO.java

@@ -18,10 +18,12 @@ import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.playlist.PlaylistDuplicatesEntry.PLAYLIST_TIMES_STREAM_IS_CONTAINED;
 import static org.schabi.newpipe.database.playlist.PlaylistMetadataEntry.PLAYLIST_STREAM_COUNT;
+import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_DISPLAY_INDEX;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.DEFAULT_THUMBNAIL;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_NAME;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_TABLE;
+import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_THUMBNAIL_PERMANENT;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_THUMBNAIL_STREAM_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_THUMBNAIL_URL;
 import static org.schabi.newpipe.database.playlist.model.PlaylistStreamEntity.JOIN_INDEX;
@@ -91,7 +93,9 @@ public interface PlaylistStreamDAO extends BasicDAO<PlaylistStreamEntity> {
     Flowable<List<PlaylistStreamEntry>> getOrderedStreamsOf(long playlistId);
 
     @Transaction
-    @Query("SELECT " + PLAYLIST_ID + ", " + PLAYLIST_NAME + ","
+    @Query("SELECT " + PLAYLIST_ID + ", " + PLAYLIST_NAME + ", "
+            + PLAYLIST_THUMBNAIL_PERMANENT + ", " + PLAYLIST_THUMBNAIL_STREAM_ID + ", "
+            + PLAYLIST_DISPLAY_INDEX + ", "
 
             + " CASE WHEN " + PLAYLIST_THUMBNAIL_STREAM_ID + " = "
             + PlaylistEntity.DEFAULT_THUMBNAIL_ID + " THEN " + "'" + DEFAULT_THUMBNAIL + "'"
@@ -105,7 +109,7 @@ public interface PlaylistStreamDAO extends BasicDAO<PlaylistStreamEntity> {
             + " LEFT JOIN " + PLAYLIST_STREAM_JOIN_TABLE
             + " ON " + PLAYLIST_TABLE + "." + PLAYLIST_ID + " = " + JOIN_PLAYLIST_ID
             + " GROUP BY " + PLAYLIST_ID
-            + " ORDER BY " + PLAYLIST_NAME + " COLLATE NOCASE ASC")
+            + " ORDER BY " + PLAYLIST_DISPLAY_INDEX)
     Flowable<List<PlaylistMetadataEntry>> getPlaylistMetadata();
 
     @RewriteQueriesToDropUnusedColumns
@@ -126,8 +130,9 @@ public interface PlaylistStreamDAO extends BasicDAO<PlaylistStreamEntity> {
     Flowable<List<PlaylistStreamEntry>> getStreamsWithoutDuplicates(long playlistId);
 
     @Transaction
-    @Query("SELECT " + PLAYLIST_TABLE + "." + PLAYLIST_ID + ", "
-            + PLAYLIST_NAME + ", "
+    @Query("SELECT " + PLAYLIST_TABLE + "." + PLAYLIST_ID + ", " + PLAYLIST_NAME + ", "
+            + PLAYLIST_THUMBNAIL_PERMANENT + ", " + PLAYLIST_THUMBNAIL_STREAM_ID + ", "
+            + PLAYLIST_DISPLAY_INDEX + ", "
 
             + " CASE WHEN " + PLAYLIST_THUMBNAIL_STREAM_ID + " = "
             + PlaylistEntity.DEFAULT_THUMBNAIL_ID + " THEN " + "'" + DEFAULT_THUMBNAIL + "'"
@@ -149,6 +154,6 @@ public interface PlaylistStreamDAO extends BasicDAO<PlaylistStreamEntity> {
             + " AND :streamUrl = :streamUrl"
 
             + " GROUP BY " + JOIN_PLAYLIST_ID
-            + " ORDER BY " + PLAYLIST_NAME + " COLLATE NOCASE ASC")
+            + " ORDER BY " + PLAYLIST_DISPLAY_INDEX)
     Flowable<List<PlaylistDuplicatesEntry>> getPlaylistDuplicatesMetadata(String streamUrl);
 }

app/src/main/java/org/schabi/newpipe/database/playlist/model/PlaylistEntity.java

@@ -2,16 +2,15 @@ package org.schabi.newpipe.database.playlist.model;
 
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
-import androidx.room.Index;
+import androidx.room.Ignore;
 import androidx.room.PrimaryKey;
 
-import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_NAME;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_TABLE;
 
 import org.schabi.newpipe.R;
+import org.schabi.newpipe.database.playlist.PlaylistMetadataEntry;
 
-@Entity(tableName = PLAYLIST_TABLE,
-        indices = {@Index(value = {PLAYLIST_NAME})})
+@Entity(tableName = PLAYLIST_TABLE)
 public class PlaylistEntity {
 
     public static final String DEFAULT_THUMBNAIL = "drawable://"
@@ -22,6 +21,7 @@ public class PlaylistEntity {
     public static final String PLAYLIST_ID = "uid";
     public static final String PLAYLIST_NAME = "name";
     public static final String PLAYLIST_THUMBNAIL_URL = "thumbnail_url";
+    public static final String PLAYLIST_DISPLAY_INDEX = "display_index";
     public static final String PLAYLIST_THUMBNAIL_PERMANENT = "is_thumbnail_permanent";
     public static final String PLAYLIST_THUMBNAIL_STREAM_ID = "thumbnail_stream_id";
 
@@ -38,11 +38,24 @@ public class PlaylistEntity {
     @ColumnInfo(name = PLAYLIST_THUMBNAIL_STREAM_ID)
     private long thumbnailStreamId;
 
+    @ColumnInfo(name = PLAYLIST_DISPLAY_INDEX)
+    private long displayIndex;
+
     public PlaylistEntity(final String name, final boolean isThumbnailPermanent,
-                          final long thumbnailStreamId) {
+                          final long thumbnailStreamId, final long displayIndex) {
         this.name = name;
         this.isThumbnailPermanent = isThumbnailPermanent;
         this.thumbnailStreamId = thumbnailStreamId;
+        this.displayIndex = displayIndex;
+    }
+
+    @Ignore
+    public PlaylistEntity(final PlaylistMetadataEntry item) {
+        this.uid = item.getUid();
+        this.name = item.name;
+        this.isThumbnailPermanent = item.isThumbnailPermanent();
+        this.thumbnailStreamId = item.getThumbnailStreamId();
+        this.displayIndex = item.getDisplayIndex();
     }
 
     public long getUid() {
@@ -77,4 +90,11 @@ public class PlaylistEntity {
         this.isThumbnailPermanent = isThumbnailSet;
     }
 
+    public long getDisplayIndex() {
+        return displayIndex;
+    }
+
+    public void setDisplayIndex(final long displayIndex) {
+        this.displayIndex = displayIndex;
+    }
 }

app/src/main/java/org/schabi/newpipe/database/playlist/model/PlaylistRemoteEntity.java

@@ -21,7 +21,6 @@ import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.RE
 
 @Entity(tableName = REMOTE_PLAYLIST_TABLE,
         indices = {
-                @Index(value = {REMOTE_PLAYLIST_NAME}),
                 @Index(value = {REMOTE_PLAYLIST_SERVICE_ID, REMOTE_PLAYLIST_URL}, unique = true)
         })
 public class PlaylistRemoteEntity implements PlaylistLocalItem {
@@ -32,6 +31,7 @@ public class PlaylistRemoteEntity implements PlaylistLocalItem {
     public static final String REMOTE_PLAYLIST_URL = "url";
     public static final String REMOTE_PLAYLIST_THUMBNAIL_URL = "thumbnail_url";
     public static final String REMOTE_PLAYLIST_UPLOADER_NAME = "uploader";
+    public static final String REMOTE_PLAYLIST_DISPLAY_INDEX = "display_index";
     public static final String REMOTE_PLAYLIST_STREAM_COUNT = "stream_count";
 
     @PrimaryKey(autoGenerate = true)
@@ -53,6 +53,9 @@ public class PlaylistRemoteEntity implements PlaylistLocalItem {
     @ColumnInfo(name = REMOTE_PLAYLIST_UPLOADER_NAME)
     private String uploader;
 
+    @ColumnInfo(name = REMOTE_PLAYLIST_DISPLAY_INDEX)
+    private long displayIndex = -1; // Make sure the new item is on the top
+
     @ColumnInfo(name = REMOTE_PLAYLIST_STREAM_COUNT)
     private Long streamCount;
 
@@ -67,6 +70,19 @@ public class PlaylistRemoteEntity implements PlaylistLocalItem {
         this.streamCount = streamCount;
     }
 
+    @Ignore
+    public PlaylistRemoteEntity(final int serviceId, final String name, final String url,
+                                final String thumbnailUrl, final String uploader,
+                                final long displayIndex, final Long streamCount) {
+        this.serviceId = serviceId;
+        this.name = name;
+        this.url = url;
+        this.thumbnailUrl = thumbnailUrl;
+        this.uploader = uploader;
+        this.displayIndex = displayIndex;
+        this.streamCount = streamCount;
+    }
+
     @Ignore
     public PlaylistRemoteEntity(final PlaylistInfo info) {
         this(info.getServiceId(), info.getName(), info.getUrl(),
@@ -93,6 +109,7 @@ public class PlaylistRemoteEntity implements PlaylistLocalItem {
                 && TextUtils.equals(getUploader(), info.getUploaderName());
     }
 
+    @Override
     public long getUid() {
         return uid;
     }
@@ -141,6 +158,16 @@ public class PlaylistRemoteEntity implements PlaylistLocalItem {
         this.uploader = uploader;
     }
 
+    @Override
+    public long getDisplayIndex() {
+        return displayIndex;
+    }
+
+    @Override
+    public void setDisplayIndex(final long displayIndex) {
+        this.displayIndex = displayIndex;
+    }
+
     public Long getStreamCount() {
         return streamCount;
     }

app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionEntity.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.database.subscription;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.room.ColumnInfo;
 import androidx.room.Entity;
 import androidx.room.Ignore;
@@ -95,11 +96,12 @@ public class SubscriptionEntity {
         this.name = name;
     }
 
+    @Nullable
     public String getAvatarUrl() {
         return avatarUrl;
     }
 
-    public void setAvatarUrl(final String avatarUrl) {
+    public void setAvatarUrl(@Nullable final String avatarUrl) {
         this.avatarUrl = avatarUrl;
     }
 

app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java

@@ -7,8 +7,6 @@ import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 import android.app.Activity;
 import android.content.ComponentName;
 import android.content.Context;
-import android.content.DialogInterface;
-import android.content.DialogInterface.OnDismissListener;
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.content.SharedPreferences;
@@ -16,6 +14,7 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.IBinder;
+import android.provider.Settings;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -74,6 +73,7 @@ import org.schabi.newpipe.util.ThemeHelper;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Objects;
@@ -111,14 +111,11 @@ public class DownloadDialog extends DialogFragment
     @State
     int selectedSubtitleIndex = 0; // default to the first item
 
-    @Nullable
-    private OnDismissListener onDismissListener = null;
-
     private StoredDirectoryHelper mainStorageAudio = null;
     private StoredDirectoryHelper mainStorageVideo = null;
     private DownloadManager downloadManager = null;
     private ActionMenuItemView okButton = null;
-    private Context context;
+    private Context context = null;
     private boolean askForSavePath;
 
     private AudioTrackAdapter audioTrackAdapter;
@@ -146,7 +143,6 @@ public class DownloadDialog extends DialogFragment
             registerForActivityResult(
                     new StartActivityForResult(), this::requestDownloadPickVideoFolderResult);
 
-
     /*//////////////////////////////////////////////////////////////////////////
     // Instance creation
     //////////////////////////////////////////////////////////////////////////*/
@@ -194,13 +190,6 @@ public class DownloadDialog extends DialogFragment
         this.selectedVideoIndex = ListHelper.getDefaultResolutionIndex(context, videoStreams);
     }
 
-    /**
-     * @param onDismissListener the listener to call in {@link #onDismiss(DialogInterface)}
-     */
-    public void setOnDismissListener(@Nullable final OnDismissListener onDismissListener) {
-        this.onDismissListener = onDismissListener;
-    }
-
 
     /*//////////////////////////////////////////////////////////////////////////
     // Android lifecycle
@@ -220,6 +209,8 @@ public class DownloadDialog extends DialogFragment
             return;
         }
 
+        // context will remain null if dismiss() was called above, allowing to check whether the
+        // dialog is being dismissed in onViewCreated()
         context = getContext();
 
         setStyle(STYLE_NO_TITLE, ThemeHelper.getDialogTheme(context));
@@ -304,6 +295,9 @@ public class DownloadDialog extends DialogFragment
                               @Nullable final Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
         dialogBinding = DownloadDialogBinding.bind(view);
+        if (context == null) {
+            return; // the dialog is being dismissed, see the call to dismiss() in onCreate()
+        }
 
         dialogBinding.fileName.setText(FilenameUtils.createFilename(getContext(),
                 currentInfo.getName()));
@@ -363,14 +357,6 @@ public class DownloadDialog extends DialogFragment
         });
     }
 
-    @Override
-    public void onDismiss(@NonNull final DialogInterface dialog) {
-        super.onDismiss(dialog);
-        if (onDismissListener != null) {
-            onDismissListener.onDismiss(dialog);
-        }
-    }
-
     @Override
     public void onDestroy() {
         super.onDestroy();
@@ -564,7 +550,6 @@ public class DownloadDialog extends DialogFragment
         }
     }
 
-
     /*//////////////////////////////////////////////////////////////////////////
     // Listeners
     //////////////////////////////////////////////////////////////////////////*/
@@ -783,6 +768,7 @@ public class DownloadDialog extends DialogFragment
         final StoredDirectoryHelper mainStorage;
         final MediaFormat format;
         final String selectedMediaType;
+        final long size;
 
         // first, build the filename and get the output folder (if possible)
         // later, run a very very very large file checking logic
@@ -794,6 +780,7 @@ public class DownloadDialog extends DialogFragment
                 selectedMediaType = getString(R.string.last_download_type_audio_key);
                 mainStorage = mainStorageAudio;
                 format = audioStreamsAdapter.getItem(selectedAudioIndex).getFormat();
+                size = getWrappedAudioStreams().getSizeInBytes(selectedAudioIndex);
                 if (format == MediaFormat.WEBMA_OPUS) {
                     mimeTmp = "audio/ogg";
                     filenameTmp += "opus";
@@ -806,6 +793,7 @@ public class DownloadDialog extends DialogFragment
                 selectedMediaType = getString(R.string.last_download_type_video_key);
                 mainStorage = mainStorageVideo;
                 format = videoStreamsAdapter.getItem(selectedVideoIndex).getFormat();
+                size = wrappedVideoStreams.getSizeInBytes(selectedVideoIndex);
                 if (format != null) {
                     mimeTmp = format.mimeType;
                     filenameTmp += format.getSuffix();
@@ -815,6 +803,7 @@ public class DownloadDialog extends DialogFragment
                 selectedMediaType = getString(R.string.last_download_type_subtitle_key);
                 mainStorage = mainStorageVideo; // subtitle & video files go together
                 format = subtitleStreamsAdapter.getItem(selectedSubtitleIndex).getFormat();
+                size = wrappedSubtitleStreams.getSizeInBytes(selectedSubtitleIndex);
                 if (format != null) {
                     mimeTmp = format.mimeType;
                 }
@@ -870,6 +859,21 @@ public class DownloadDialog extends DialogFragment
             return;
         }
 
+        // Check for free storage space
+        final long freeSpace = mainStorage.getFreeStorageSpace();
+        if (freeSpace <= size) {
+            Toast.makeText(context, getString(R.
+                    string.error_insufficient_storage), Toast.LENGTH_LONG).show();
+            // move the user to storage setting tab
+            final Intent storageSettingsIntent = new Intent(Settings.
+                    ACTION_INTERNAL_STORAGE_SETTINGS);
+            if (storageSettingsIntent.resolveActivity(context.getPackageManager())
+                    != null) {
+                startActivity(storageSettingsIntent);
+            }
+            return;
+        }
+
         // check for existing file with the same name
         checkSelectedDownload(mainStorage, mainStorage.findFile(filenameTmp), filenameTmp,
                 mimeTmp);
@@ -1052,7 +1056,7 @@ public class DownloadDialog extends DialogFragment
         final char kind;
         int threads = dialogBinding.threads.getProgress() + 1;
         final String[] urls;
-        final MissionRecoveryInfo[] recoveryInfo;
+        final List<MissionRecoveryInfo> recoveryInfo;
         String psName = null;
         String[] psArgs = null;
         long nearLength = 0;
@@ -1117,9 +1121,7 @@ public class DownloadDialog extends DialogFragment
             urls = new String[] {
                     selectedStream.getContent()
             };
-            recoveryInfo = new MissionRecoveryInfo[] {
-                    new MissionRecoveryInfo(selectedStream)
-            };
+            recoveryInfo = List.of(new MissionRecoveryInfo(selectedStream));
         } else {
             if (secondaryStream.getDeliveryMethod() != PROGRESSIVE_HTTP) {
                 throw new IllegalArgumentException("Unsupported stream delivery format"
@@ -1129,12 +1131,14 @@ public class DownloadDialog extends DialogFragment
             urls = new String[] {
                     selectedStream.getContent(), secondaryStream.getContent()
             };
-            recoveryInfo = new MissionRecoveryInfo[] {new MissionRecoveryInfo(selectedStream),
-                    new MissionRecoveryInfo(secondaryStream)};
+            recoveryInfo = List.of(
+                    new MissionRecoveryInfo(selectedStream),
+                    new MissionRecoveryInfo(secondaryStream)
+            );
         }
 
         DownloadManagerService.startMission(context, urls, storage, kind, threads,
-                currentInfo.getUrl(), psName, psArgs, nearLength, recoveryInfo);
+                currentInfo.getUrl(), psName, psArgs, nearLength, new ArrayList<>(recoveryInfo));
 
         Toast.makeText(context, getString(R.string.download_has_started),
                 Toast.LENGTH_SHORT).show();

app/src/main/java/org/schabi/newpipe/error/ErrorActivity.java

@@ -17,6 +17,7 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.IntentCompat;
 
 import com.grack.nanojson.JsonWriter;
 
@@ -105,7 +106,7 @@ public class ErrorActivity extends AppCompatActivity {
             actionBar.setDisplayShowTitleEnabled(true);
         }
 
-        errorInfo = intent.getParcelableExtra(ERROR_INFO);
+        errorInfo = IntentCompat.getParcelableExtra(intent, ERROR_INFO, ErrorInfo.class);
 
         // important add guru meditation
         addGuruMeditation();

app/src/main/java/org/schabi/newpipe/error/UserAction.java

@@ -6,6 +6,7 @@ package org.schabi.newpipe.error;
 public enum UserAction {
     USER_REPORT("user report"),
     UI_ERROR("ui error"),
+    DATABASE_IMPORT_EXPORT("database import or export"),
     SUBSCRIPTION_CHANGE("subscription change"),
     SUBSCRIPTION_UPDATE("subscription update"),
     SUBSCRIPTION_GET("get subscription"),
@@ -19,6 +20,7 @@ public enum UserAction {
     REQUESTED_PLAYLIST("requested playlist"),
     REQUESTED_KIOSK("requested kiosk"),
     REQUESTED_COMMENTS("requested comments"),
+    REQUESTED_COMMENT_REPLIES("requested comment replies"),
     REQUESTED_FEED("requested feed"),
     REQUESTED_BOOKMARK("bookmark"),
     DELETE_FROM_HISTORY("delete from history"),

app/src/main/java/org/schabi/newpipe/fragments/MainFragment.java

@@ -220,7 +220,7 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
     public void commitPlaylistTabs() {
         pagerAdapter.getLocalPlaylistFragments()
                 .stream()
-                .forEach(LocalPlaylistFragment::commitChanges);
+                .forEach(LocalPlaylistFragment::saveImmediate);
     }
 
     private void updateTabLayoutPosition() {
@@ -282,7 +282,7 @@ public class MainFragment extends BaseFragment implements TabLayout.OnTabSelecte
          * Keep reference to LocalPlaylistFragments, because their data can be modified by the user
          * during runtime and changes are not committed immediately. However, in some cases,
          * the changes need to be committed immediately by calling
-         * {@link LocalPlaylistFragment#commitChanges()}.
+         * {@link LocalPlaylistFragment#saveImmediate()}.
          * The fragments are removed when {@link LocalPlaylistFragment#onDestroy()} is called.
          */
         private final List<LocalPlaylistFragment> localPlaylistFragments = new ArrayList<>();

app/src/main/java/org/schabi/newpipe/fragments/detail/BaseDescriptionFragment.java

@@ -64,7 +64,7 @@ public abstract class BaseDescriptionFragment extends BaseFragment {
 
     /**
      * Get the description to display.
-     * @return description object
+     * @return description object, if available
      */
     @Nullable
     protected abstract Description getDescription();
@@ -73,7 +73,7 @@ public abstract class BaseDescriptionFragment extends BaseFragment {
      * Get the streaming service. Used for generating description links.
      * @return streaming service
      */
-    @Nullable
+    @NonNull
     protected abstract StreamingService getService();
 
     /**
@@ -93,7 +93,7 @@ public abstract class BaseDescriptionFragment extends BaseFragment {
      * Get the list of tags to display below the description.
      * @return tag list
      */
-    @Nullable
+    @NonNull
     public abstract List<String> getTags();
 
     /**
@@ -158,7 +158,7 @@ public abstract class BaseDescriptionFragment extends BaseFragment {
                                    final LinearLayout layout,
                                    final boolean linkifyContent,
                                    @StringRes final int type,
-                                   @Nullable final String content) {
+                                   @NonNull final String content) {
         if (isBlank(content)) {
             return;
         }
@@ -221,16 +221,12 @@ public abstract class BaseDescriptionFragment extends BaseFragment {
                 urls.append(imageSizeToText(image.getWidth()));
             } else {
                 switch (image.getEstimatedResolutionLevel()) {
-                    case LOW:
-                        urls.append(getString(R.string.image_quality_low));
-                        break;
-                    default: // unreachable, Image.ResolutionLevel.UNKNOWN is already filtered out
-                    case MEDIUM:
-                        urls.append(getString(R.string.image_quality_medium));
-                        break;
-                    case HIGH:
-                        urls.append(getString(R.string.image_quality_high));
-                        break;
+                    case LOW -> urls.append(getString(R.string.image_quality_low));
+                    case MEDIUM -> urls.append(getString(R.string.image_quality_medium));
+                    case HIGH -> urls.append(getString(R.string.image_quality_high));
+                    default -> {
+                        // unreachable, Image.ResolutionLevel.UNKNOWN is already filtered out
+                    }
                 }
             }
 
@@ -255,7 +251,7 @@ public abstract class BaseDescriptionFragment extends BaseFragment {
     private void addTagsMetadataItem(final LayoutInflater inflater, final LinearLayout layout) {
         final List<String> tags = getTags();
 
-        if (tags != null && !tags.isEmpty()) {
+        if (!tags.isEmpty()) {
             final var itemBinding = ItemMetadataTagsBinding.inflate(inflater, layout, false);
 
             tags.stream().sorted(String.CASE_INSENSITIVE_ORDER).forEach(tag -> {

app/src/main/java/org/schabi/newpipe/fragments/detail/DescriptionFragment.java

@@ -7,6 +7,7 @@ import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.LinearLayout;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
 
@@ -23,56 +24,43 @@ import icepick.State;
 public class DescriptionFragment extends BaseDescriptionFragment {
 
     @State
-    StreamInfo streamInfo = null;
-
-    public DescriptionFragment() {
-    }
+    StreamInfo streamInfo;
 
     public DescriptionFragment(final StreamInfo streamInfo) {
         this.streamInfo = streamInfo;
     }
 
-    @Nullable
-    @Override
-    protected Description getDescription() {
-        if (streamInfo == null) {
-            return null;
-        }
-        return streamInfo.getDescription();
+    public DescriptionFragment() {
+        // keep empty constructor for IcePick when resuming fragment from memory
     }
 
+
     @Nullable
     @Override
+    protected Description getDescription() {
+        return streamInfo.getDescription();
+    }
+
+    @NonNull
+    @Override
     protected StreamingService getService() {
-        if (streamInfo == null) {
-            return null;
-        }
         return streamInfo.getService();
     }
 
     @Override
     protected int getServiceId() {
-        if (streamInfo == null) {
-            return -1;
-        }
         return streamInfo.getServiceId();
     }
 
-    @Nullable
+    @NonNull
     @Override
     protected String getStreamUrl() {
-        if (streamInfo == null) {
-            return null;
-        }
         return streamInfo.getUrl();
     }
 
-    @Nullable
+    @NonNull
     @Override
     public List<String> getTags() {
-        if (streamInfo == null) {
-            return null;
-        }
         return streamInfo.getTags();
     }
 

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -72,8 +72,8 @@ import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.error.ReCaptchaActivity;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.extractor.Image;
-import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
 import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.stream.AudioStream;
@@ -106,16 +106,17 @@ import org.schabi.newpipe.player.ui.VideoPlayerUi;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
+import org.schabi.newpipe.util.InfoCache;
 import org.schabi.newpipe.util.ListHelper;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.PermissionHelper;
-import org.schabi.newpipe.util.image.PicassoHelper;
+import org.schabi.newpipe.util.PlayButtonHelper;
 import org.schabi.newpipe.util.StreamTypeUtil;
 import org.schabi.newpipe.util.ThemeHelper;
 import org.schabi.newpipe.util.external_communication.KoreUtils;
 import org.schabi.newpipe.util.external_communication.ShareUtils;
-import org.schabi.newpipe.util.PlayButtonHelper;
+import org.schabi.newpipe.util.image.PicassoHelper;
 
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -481,7 +482,7 @@ public final class VideoDetailFragment
 
                 // commit previous pending changes to database
                 if (fragment instanceof LocalPlaylistFragment) {
-                    ((LocalPlaylistFragment) fragment).commitChanges();
+                    ((LocalPlaylistFragment) fragment).saveImmediate();
                 } else if (fragment instanceof MainFragment) {
                     ((MainFragment) fragment).commitPlaylistTabs();
                 }
@@ -1012,6 +1013,20 @@ public final class VideoDetailFragment
         updateTabLayoutVisibility();
     }
 
+    public void scrollToComment(final CommentsInfoItem comment) {
+        final int commentsTabPos = pageAdapter.getItemPositionByTitle(COMMENTS_TAB_TAG);
+        final Fragment fragment = pageAdapter.getItem(commentsTabPos);
+        if (!(fragment instanceof CommentsFragment)) {
+            return;
+        }
+
+        // unexpand the app bar only if scrolling to the comment succeeded
+        if (((CommentsFragment) fragment).scrollToComment(comment)) {
+            binding.appBarLayout.setExpanded(false, false);
+            binding.viewPager.setCurrentItem(commentsTabPos, false);
+        }
+    }
+
     /*//////////////////////////////////////////////////////////////////////////
     // Play Utils
     //////////////////////////////////////////////////////////////////////////*/
@@ -1430,7 +1445,7 @@ public final class VideoDetailFragment
         super.showLoading();
 
         //if data is already cached, transition from VISIBLE -> INVISIBLE -> VISIBLE is not required
-        if (!ExtractorHelper.isCached(serviceId, url, InfoItem.InfoType.STREAM)) {
+        if (!ExtractorHelper.isCached(serviceId, url, InfoCache.Type.STREAM)) {
             binding.detailContentRootHiding.setVisibility(View.INVISIBLE);
         }
 

app/src/main/java/org/schabi/newpipe/fragments/list/BaseListInfoFragment.java

@@ -231,6 +231,8 @@ public abstract class BaseListInfoFragment<I extends InfoItem, L extends ListInf
             if (!result.getRelatedItems().isEmpty()) {
                 infoListAdapter.addInfoItemList(result.getRelatedItems());
                 showListFooter(hasMoreItems());
+            } else if (hasMoreItems()) {
+                loadMoreItems();
             } else {
                 infoListAdapter.clearStreamItemList();
                 showEmptyState();

app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelAboutFragment.java

@@ -2,12 +2,12 @@ package org.schabi.newpipe.fragments.list.channel;
 
 import static org.schabi.newpipe.extractor.stream.StreamExtractor.UNKNOWN_SUBSCRIBER_COUNT;
 
-import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.LinearLayout;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import org.schabi.newpipe.R;
@@ -26,14 +26,12 @@ public class ChannelAboutFragment extends BaseDescriptionFragment {
     @State
     protected ChannelInfo channelInfo;
 
-    public static ChannelAboutFragment getInstance(final ChannelInfo channelInfo) {
-        final ChannelAboutFragment fragment = new ChannelAboutFragment();
-        fragment.channelInfo = channelInfo;
-        return fragment;
+    ChannelAboutFragment(@NonNull final ChannelInfo channelInfo) {
+        this.channelInfo = channelInfo;
     }
 
     public ChannelAboutFragment() {
-        super();
+        // keep empty constructor for IcePick when resuming fragment from memory
     }
 
     @Override
@@ -45,26 +43,17 @@ public class ChannelAboutFragment extends BaseDescriptionFragment {
     @Nullable
     @Override
     protected Description getDescription() {
-        if (channelInfo == null) {
-            return null;
-        }
         return new Description(channelInfo.getDescription(), Description.PLAIN_TEXT);
     }
 
-    @Nullable
+    @NonNull
     @Override
     protected StreamingService getService() {
-        if (channelInfo == null) {
-            return null;
-        }
         return channelInfo.getService();
     }
 
     @Override
     protected int getServiceId() {
-        if (channelInfo == null) {
-            return -1;
-        }
         return channelInfo.getServiceId();
     }
 
@@ -74,12 +63,9 @@ public class ChannelAboutFragment extends BaseDescriptionFragment {
         return null;
     }
 
-    @Nullable
+    @NonNull
     @Override
     public List<String> getTags() {
-        if (channelInfo == null) {
-            return null;
-        }
         return channelInfo.getTags();
     }
 
@@ -93,10 +79,11 @@ public class ChannelAboutFragment extends BaseDescriptionFragment {
             return;
         }
 
-        final Context context = getContext();
         if (channelInfo.getSubscriberCount() != UNKNOWN_SUBSCRIBER_COUNT) {
             addMetadataItem(inflater, layout, false, R.string.metadata_subscribers,
-                    Localization.localizeNumber(context, channelInfo.getSubscriberCount()));
+                    Localization.localizeNumber(
+                            requireContext(),
+                            channelInfo.getSubscriberCount()));
         }
 
         addImagesMetadataItem(inflater, layout, R.string.metadata_avatars,

app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java

@@ -474,7 +474,7 @@ public class ChannelFragment extends BaseStateFragment<ChannelInfo>
             if (ChannelTabHelper.showChannelTab(
                     context, preferences, R.string.show_channel_tabs_about)) {
                 tabAdapter.addFragment(
-                        ChannelAboutFragment.getInstance(currentInfo),
+                        new ChannelAboutFragment(currentInfo),
                         context.getString(R.string.channel_tab_about));
             }
         }

app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentRepliesFragment.java

@@ -0,0 +1,170 @@
+package org.schabi.newpipe.fragments.list.comments;
+
+import static org.schabi.newpipe.util.ServiceHelper.getServiceById;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.constraintlayout.widget.ConstraintLayout;
+import androidx.core.text.HtmlCompat;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.databinding.CommentRepliesHeaderBinding;
+import org.schabi.newpipe.error.UserAction;
+import org.schabi.newpipe.extractor.ListExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
+import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
+import org.schabi.newpipe.info_list.ItemViewMode;
+import org.schabi.newpipe.util.DeviceUtils;
+import org.schabi.newpipe.util.ExtractorHelper;
+import org.schabi.newpipe.util.Localization;
+import org.schabi.newpipe.util.NavigationHelper;
+import org.schabi.newpipe.util.image.ImageStrategy;
+import org.schabi.newpipe.util.image.PicassoHelper;
+import org.schabi.newpipe.util.text.TextLinkifier;
+
+import java.util.Queue;
+import java.util.function.Supplier;
+
+import icepick.State;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+
+public final class CommentRepliesFragment
+        extends BaseListInfoFragment<CommentsInfoItem, CommentRepliesInfo> {
+
+    public static final String TAG = CommentRepliesFragment.class.getSimpleName();
+
+    @State
+    CommentsInfoItem commentsInfoItem; // the comment to show replies of
+    private final CompositeDisposable disposables = new CompositeDisposable();
+
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Constructors and lifecycle
+    //////////////////////////////////////////////////////////////////////////*/
+
+    // only called by the Android framework, after which readFrom is called and restores all data
+    public CommentRepliesFragment() {
+        super(UserAction.REQUESTED_COMMENT_REPLIES);
+    }
+
+    public CommentRepliesFragment(@NonNull final CommentsInfoItem commentsInfoItem) {
+        this();
+        this.commentsInfoItem = commentsInfoItem;
+        // setting "" as title since the title will be properly set right after
+        setInitialData(commentsInfoItem.getServiceId(), commentsInfoItem.getUrl(), "");
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull final LayoutInflater inflater,
+                             @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_comments, container, false);
+    }
+
+    @Override
+    public void onDestroyView() {
+        disposables.clear();
+        super.onDestroyView();
+    }
+
+    @Override
+    protected Supplier<View> getListHeaderSupplier() {
+        return () -> {
+            final CommentRepliesHeaderBinding binding = CommentRepliesHeaderBinding
+                    .inflate(activity.getLayoutInflater(), itemsList, false);
+            final CommentsInfoItem item = commentsInfoItem;
+
+            // load the author avatar
+            PicassoHelper.loadAvatar(item.getUploaderAvatars()).into(binding.authorAvatar);
+            binding.authorAvatar.setVisibility(ImageStrategy.shouldLoadImages()
+                    ? View.VISIBLE : View.GONE);
+
+            // setup author name and comment date
+            binding.authorName.setText(item.getUploaderName());
+            binding.uploadDate.setText(Localization.relativeTimeOrTextual(
+                    getContext(), item.getUploadDate(), item.getTextualUploadDate()));
+            binding.authorTouchArea.setOnClickListener(
+                    v -> NavigationHelper.openCommentAuthorIfPresent(requireActivity(), item));
+
+            // setup like count, hearted and pinned
+            binding.thumbsUpCount.setText(
+                    Localization.likeCount(requireContext(), item.getLikeCount()));
+            // for heartImage goneMarginEnd was used, but there is no way to tell ConstraintLayout
+            // not to use a different margin only when both the next two views are gone
+            ((ConstraintLayout.LayoutParams) binding.thumbsUpCount.getLayoutParams())
+                    .setMarginEnd(DeviceUtils.dpToPx(
+                            (item.isHeartedByUploader() || item.isPinned() ? 8 : 16),
+                            requireContext()));
+            binding.heartImage.setVisibility(item.isHeartedByUploader() ? View.VISIBLE : View.GONE);
+            binding.pinnedImage.setVisibility(item.isPinned() ? View.VISIBLE : View.GONE);
+
+            // setup comment content
+            TextLinkifier.fromDescription(binding.commentContent, item.getCommentText(),
+                    HtmlCompat.FROM_HTML_MODE_LEGACY, getServiceById(item.getServiceId()),
+                    item.getUrl(), disposables, null);
+
+            return binding.getRoot();
+        };
+    }
+
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // State saving
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    public void writeTo(final Queue<Object> objectsToSave) {
+        super.writeTo(objectsToSave);
+        objectsToSave.add(commentsInfoItem);
+    }
+
+    @Override
+    public void readFrom(@NonNull final Queue<Object> savedObjects) throws Exception {
+        super.readFrom(savedObjects);
+        commentsInfoItem = (CommentsInfoItem) savedObjects.poll();
+    }
+
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Data loading
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    protected Single<CommentRepliesInfo> loadResult(final boolean forceLoad) {
+        return Single.fromCallable(() -> new CommentRepliesInfo(commentsInfoItem,
+                // the reply count string will be shown as the activity title
+                Localization.replyCount(requireContext(), commentsInfoItem.getReplyCount())));
+    }
+
+    @Override
+    protected Single<ListExtractor.InfoItemsPage<CommentsInfoItem>> loadMoreItemsLogic() {
+        // commentsInfoItem.getUrl() should contain the url of the original
+        // ListInfo<CommentsInfoItem>, which should be the stream url
+        return ExtractorHelper.getMoreCommentItems(
+                serviceId, commentsInfoItem.getUrl(), currentNextPage);
+    }
+
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Utils
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    protected ItemViewMode getItemViewMode() {
+        return ItemViewMode.LIST;
+    }
+
+    /**
+     * @return the comment to which the replies are shown
+     */
+    public CommentsInfoItem getCommentsInfoItem() {
+        return commentsInfoItem;
+    }
+}

app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentRepliesInfo.java

@@ -0,0 +1,22 @@
+package org.schabi.newpipe.fragments.list.comments;
+
+import org.schabi.newpipe.extractor.ListInfo;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+
+import java.util.Collections;
+
+public final class CommentRepliesInfo extends ListInfo<CommentsInfoItem> {
+    /**
+     * This class is used to wrap the comment replies page into a ListInfo object.
+     *
+     * @param comment the comment from which to get replies
+     * @param name will be shown as the fragment title
+     */
+    public CommentRepliesInfo(final CommentsInfoItem comment, final String name) {
+        super(comment.getServiceId(),
+                new ListLinkHandler("", "", "", Collections.emptyList(), null), name);
+        setNextPage(comment.getReplies());
+        setRelatedItems(Collections.emptyList()); // since it must be non-null
+    }
+}

app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.java

@@ -110,4 +110,14 @@ public class CommentsFragment extends BaseListInfoFragment<CommentsInfoItem, Com
     protected ItemViewMode getItemViewMode() {
         return ItemViewMode.LIST;
     }
+
+    public boolean scrollToComment(final CommentsInfoItem comment) {
+        final int position = infoListAdapter.getItemsList().indexOf(comment);
+        if (position < 0) {
+            return false;
+        }
+
+        itemsList.scrollToPosition(position);
+        return true;
+    }
 }

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java

@@ -1,7 +1,9 @@
 package org.schabi.newpipe.fragments.list.playlist;
 
+import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
 import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.ktx.ViewUtils.animateHideRecyclerViewAllowingScrolling;
+import static org.schabi.newpipe.util.ServiceHelper.getServiceById;
 
 import android.content.Context;
 import android.os.Bundle;
@@ -37,6 +39,7 @@ import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.ServiceList;
 import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
 import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
+import org.schabi.newpipe.extractor.stream.Description;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
 import org.schabi.newpipe.info_list.dialog.InfoItemDialog;
@@ -48,9 +51,10 @@ import org.schabi.newpipe.player.playqueue.PlaylistPlayQueue;
 import org.schabi.newpipe.util.ExtractorHelper;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
-import org.schabi.newpipe.util.image.PicassoHelper;
-import org.schabi.newpipe.util.external_communication.ShareUtils;
 import org.schabi.newpipe.util.PlayButtonHelper;
+import org.schabi.newpipe.util.external_communication.ShareUtils;
+import org.schabi.newpipe.util.image.PicassoHelper;
+import org.schabi.newpipe.util.text.TextEllipsizer;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -85,6 +89,9 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
 
     private MenuItem playlistBookmarkButton;
 
+    private long streamCount;
+    private long playlistOverallDurationSeconds;
+
     public static PlaylistFragment getInstance(final int serviceId, final String url,
                                                final String name) {
         final PlaylistFragment instance = new PlaylistFragment();
@@ -273,6 +280,12 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
         animate(headerBinding.uploaderLayout, false, 200);
     }
 
+    @Override
+    public void handleNextItems(final ListExtractor.InfoItemsPage result) {
+        super.handleNextItems(result);
+        setStreamCountAndOverallDuration(result.getItems(), !result.hasNextPage());
+    }
+
     @Override
     public void handleResult(@NonNull final PlaylistInfo result) {
         super.handleResult(result);
@@ -318,8 +331,31 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
                     .into(headerBinding.uploaderAvatarView);
         }
 
-        headerBinding.playlistStreamCount.setText(Localization
-                .localizeStreamCount(getContext(), result.getStreamCount()));
+        streamCount = result.getStreamCount();
+        setStreamCountAndOverallDuration(result.getRelatedItems(), !result.hasNextPage());
+
+        final Description description = result.getDescription();
+        if (description != null && description != Description.EMPTY_DESCRIPTION
+                && !isBlank(description.getContent())) {
+            final TextEllipsizer ellipsizer = new TextEllipsizer(
+                    headerBinding.playlistDescription, 5, getServiceById(result.getServiceId()));
+            ellipsizer.setStateChangeListener(isEllipsized ->
+                headerBinding.playlistDescriptionReadMore.setText(
+                        Boolean.TRUE.equals(isEllipsized) ? R.string.show_more : R.string.show_less
+                ));
+            ellipsizer.setOnContentChanged(canBeEllipsized -> {
+                headerBinding.playlistDescriptionReadMore.setVisibility(
+                        Boolean.TRUE.equals(canBeEllipsized) ? View.VISIBLE : View.GONE);
+                if (Boolean.TRUE.equals(canBeEllipsized)) {
+                    ellipsizer.ellipsize();
+                }
+            });
+            ellipsizer.setContent(description);
+            headerBinding.playlistDescriptionReadMore.setOnClickListener(v -> ellipsizer.toggle());
+        } else {
+            headerBinding.playlistDescription.setVisibility(View.GONE);
+            headerBinding.playlistDescriptionReadMore.setVisibility(View.GONE);
+        }
 
         if (!result.getErrors().isEmpty()) {
             showSnackBarError(new ErrorInfo(result.getErrors(), UserAction.REQUESTED_PLAYLIST,
@@ -459,4 +495,20 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
         playlistBookmarkButton.setIcon(drawable);
         playlistBookmarkButton.setTitle(titleRes);
     }
+
+    private void setStreamCountAndOverallDuration(final List<StreamInfoItem> list,
+                                                  final boolean isDurationComplete) {
+        if (activity != null && headerBinding != null) {
+            playlistOverallDurationSeconds += list.stream()
+                    .mapToLong(x -> x.getDuration())
+                    .sum();
+            headerBinding.playlistStreamCount.setText(
+                Localization.concatenateStrings(
+                    Localization.localizeStreamCount(activity, streamCount),
+                    Localization.getDurationString(playlistOverallDurationSeconds,
+                            isDurationComplete, true))
+            );
+        }
+    }
+
 }

app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.fragments.list.search;
 
 import static androidx.recyclerview.widget.ItemTouchHelper.Callback.makeMovementFlags;
+import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
 import static org.schabi.newpipe.ktx.ViewUtils.animate;
 import static org.schabi.newpipe.util.ExtractorHelper.showMetaInfoInTextView;
 import static java.util.Arrays.asList;
@@ -389,7 +390,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
     @Override
     public void onSaveInstanceState(@NonNull final Bundle bundle) {
         searchString = searchEditText != null
-                ? searchEditText.getText().toString()
+                ? getSearchEditString().trim()
                 : searchString;
         super.onSaveInstanceState(bundle);
     }
@@ -400,11 +401,11 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
 
     @Override
     public void reloadContent() {
-        if (!TextUtils.isEmpty(searchString)
-                || (searchEditText != null && !TextUtils.isEmpty(searchEditText.getText()))) {
+        if (!TextUtils.isEmpty(searchString) || (searchEditText != null
+                && !isSearchEditBlank())) {
             search(!TextUtils.isEmpty(searchString)
                     ? searchString
-                    : searchEditText.getText().toString(), this.contentFilter, "");
+                    : getSearchEditString(), this.contentFilter, "");
         } else {
             if (searchEditText != null) {
                 searchEditText.setText("");
@@ -498,7 +499,8 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
         }
         searchEditText.setText(searchString);
 
-        if (TextUtils.isEmpty(searchString) || TextUtils.isEmpty(searchEditText.getText())) {
+        if (TextUtils.isEmpty(searchString)
+                || isSearchEditBlank()) {
             searchToolbarContainer.setTranslationX(100);
             searchToolbarContainer.setAlpha(0.0f);
             searchToolbarContainer.setVisibility(View.VISIBLE);
@@ -522,7 +524,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
             if (DEBUG) {
                 Log.d(TAG, "onClick() called with: v = [" + v + "]");
             }
-            if (TextUtils.isEmpty(searchEditText.getText())) {
+            if (isSearchEditBlank()) {
                 NavigationHelper.gotoMainFragment(getFM());
                 return;
             }
@@ -603,7 +605,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                     s.removeSpan(span);
                 }
 
-                final String newText = searchEditText.getText().toString();
+                final String newText = getSearchEditString().trim();
                 suggestionPublisher.onNext(newText);
             }
         };
@@ -619,7 +621,8 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                     } else if (event != null
                             && (event.getKeyCode() == KeyEvent.KEYCODE_ENTER
                             || event.getAction() == EditorInfo.IME_ACTION_SEARCH)) {
-                        search(searchEditText.getText().toString(), new String[0], "");
+                        searchEditText.setText(getSearchEditString().trim());
+                        search(getSearchEditString(), new String[0], "");
                         return true;
                     }
                     return false;
@@ -694,7 +697,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                             .observeOn(AndroidSchedulers.mainThread())
                             .subscribe(
                                     howManyDeleted -> suggestionPublisher
-                                            .onNext(searchEditText.getText().toString()),
+                                            .onNext(getSearchEditString()),
                                     throwable -> showSnackBarError(new ErrorInfo(throwable,
                                             UserAction.DELETE_FROM_HISTORY,
                                             "Deleting item failed")));
@@ -723,9 +726,9 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                 .getRelatedSearches(query, similarQueryLimit, 25)
                 .toObservable()
                 .map(searchHistoryEntries ->
-                    searchHistoryEntries.stream()
-                            .map(entry -> new SuggestionItem(true, entry))
-                            .collect(Collectors.toList()));
+                        searchHistoryEntries.stream()
+                                .map(entry -> new SuggestionItem(true, entry))
+                                .collect(Collectors.toList()));
     }
 
     private Observable<List<SuggestionItem>> getRemoteSuggestionsObservable(final String query) {
@@ -792,12 +795,12 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                             } else if (listNotification.isOnError()
                                     && listNotification.getError() != null
                                     && !ExceptionUtils.isInterruptedCaused(
-                                            listNotification.getError())) {
+                                    listNotification.getError())) {
                                 showSnackBarError(new ErrorInfo(listNotification.getError(),
                                         UserAction.GET_SUGGESTIONS, searchString, serviceId));
                             }
                         }, throwable -> showSnackBarError(new ErrorInfo(
-                            throwable, UserAction.GET_SUGGESTIONS, searchString, serviceId)));
+                                throwable, UserAction.GET_SUGGESTIONS, searchString, serviceId)));
     }
 
     @Override
@@ -805,7 +808,13 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
         // no-op
     }
 
-    private void search(final String theSearchString,
+    /**
+     * Perform a search.
+     * @param theSearchString the trimmed search string
+     * @param theContentFilter the content filter to use. FIXME: unused param
+     * @param theSortFilter FIXME: unused param
+     */
+    private void search(@NonNull final String theSearchString,
                         final String[] theContentFilter,
                         final String theSortFilter) {
         if (DEBUG) {
@@ -815,25 +824,26 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
             return;
         }
 
+        // Check if theSearchString is a URL which can be opened by NewPipe directly
+        // and open it if possible.
         try {
             final StreamingService streamingService = NewPipe.getServiceByUrl(theSearchString);
-            if (streamingService != null) {
-                showLoading();
-                disposables.add(Observable
-                        .fromCallable(() -> NavigationHelper.getIntentByLink(activity,
-                                streamingService, theSearchString))
-                        .subscribeOn(Schedulers.io())
-                        .observeOn(AndroidSchedulers.mainThread())
-                        .subscribe(intent -> {
-                            getFM().popBackStackImmediate();
-                            activity.startActivity(intent);
-                        }, throwable -> showTextError(getString(R.string.unsupported_url))));
-                return;
-            }
+            showLoading();
+            disposables.add(Observable
+                    .fromCallable(() -> NavigationHelper.getIntentByLink(activity,
+                            streamingService, theSearchString))
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(intent -> {
+                        getFM().popBackStackImmediate();
+                        activity.startActivity(intent);
+                    }, throwable -> showTextError(getString(R.string.unsupported_url))));
+            return;
         } catch (final Exception ignored) {
             // Exception occurred, it's not a url
         }
 
+        // prepare search
         lastSearchedString = this.searchString;
         this.searchString = theSearchString;
         infoListAdapter.clearStreamItemList();
@@ -842,13 +852,17 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                 searchBinding.searchMetaInfoSeparator, disposables);
         hideKeyboardSearch();
 
+        // store search query if search history is enabled
         disposables.add(historyRecordManager.onSearched(serviceId, theSearchString)
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(
-                        ignored -> { },
+                        ignored -> {
+                        },
                         throwable -> showSnackBarError(new ErrorInfo(throwable, UserAction.SEARCHED,
                                 theSearchString, serviceId))
                 ));
+
+        // load search results
         suggestionPublisher.onNext(theSearchString);
         startLoading(false);
     }
@@ -938,6 +952,14 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
         sortFilter = theSortFilter;
     }
 
+    private String getSearchEditString() {
+        return searchEditText.getText().toString();
+    }
+
+    private boolean isSearchEditBlank() {
+        return isBlank(getSearchEditString());
+    }
+
     /*//////////////////////////////////////////////////////////////////////////
     // Suggestion Results
     //////////////////////////////////////////////////////////////////////////*/
@@ -979,6 +1001,9 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
         }
 
         searchSuggestion = result.getSearchSuggestion();
+        if (searchSuggestion != null) {
+            searchSuggestion = searchSuggestion.trim();
+        }
         isCorrectedSearch = result.isCorrectedSearch();
 
         // List<MetaInfo> cannot be bundled without creating some containers
@@ -1080,7 +1105,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(
                         howManyDeleted -> suggestionPublisher
-                                .onNext(searchEditText.getText().toString()),
+                                .onNext(getSearchEditString()),
                         throwable -> showSnackBarError(new ErrorInfo(throwable,
                                 UserAction.DELETE_FROM_HISTORY, "Deleting item failed")));
         disposables.add(onDelete);

app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedItemsFragment.java

@@ -21,18 +21,17 @@ import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
 import org.schabi.newpipe.info_list.ItemViewMode;
 import org.schabi.newpipe.ktx.ViewUtils;
-import org.schabi.newpipe.util.RelatedItemInfo;
 
 import java.io.Serializable;
 import java.util.function.Supplier;
 
 import io.reactivex.rxjava3.core.Single;
 
-public class RelatedItemsFragment extends BaseListInfoFragment<InfoItem, RelatedItemInfo>
+public class RelatedItemsFragment extends BaseListInfoFragment<InfoItem, RelatedItemsInfo>
         implements SharedPreferences.OnSharedPreferenceChangeListener {
     private static final String INFO_KEY = "related_info_key";
 
-    private RelatedItemInfo relatedItemInfo;
+    private RelatedItemsInfo relatedItemsInfo;
 
     /*//////////////////////////////////////////////////////////////////////////
     // Views
@@ -69,7 +68,7 @@ public class RelatedItemsFragment extends BaseListInfoFragment<InfoItem, Related
 
     @Override
     protected Supplier<View> getListHeaderSupplier() {
-        if (relatedItemInfo == null || relatedItemInfo.getRelatedItems() == null) {
+        if (relatedItemsInfo == null || relatedItemsInfo.getRelatedItems() == null) {
             return null;
         }
 
@@ -97,8 +96,8 @@ public class RelatedItemsFragment extends BaseListInfoFragment<InfoItem, Related
     //////////////////////////////////////////////////////////////////////////*/
 
     @Override
-    protected Single<RelatedItemInfo> loadResult(final boolean forceLoad) {
-        return Single.fromCallable(() -> relatedItemInfo);
+    protected Single<RelatedItemsInfo> loadResult(final boolean forceLoad) {
+        return Single.fromCallable(() -> relatedItemsInfo);
     }
 
     @Override
@@ -110,7 +109,7 @@ public class RelatedItemsFragment extends BaseListInfoFragment<InfoItem, Related
     }
 
     @Override
-    public void handleResult(@NonNull final RelatedItemInfo result) {
+    public void handleResult(@NonNull final RelatedItemsInfo result) {
         super.handleResult(result);
 
         if (headerBinding != null) {
@@ -137,23 +136,23 @@ public class RelatedItemsFragment extends BaseListInfoFragment<InfoItem, Related
 
     private void setInitialData(final StreamInfo info) {
         super.setInitialData(info.getServiceId(), info.getUrl(), info.getName());
-        if (this.relatedItemInfo == null) {
-            this.relatedItemInfo = RelatedItemInfo.getInfo(info);
+        if (this.relatedItemsInfo == null) {
+            this.relatedItemsInfo = new RelatedItemsInfo(info);
         }
     }
 
     @Override
     public void onSaveInstanceState(@NonNull final Bundle outState) {
         super.onSaveInstanceState(outState);
-        outState.putSerializable(INFO_KEY, relatedItemInfo);
+        outState.putSerializable(INFO_KEY, relatedItemsInfo);
     }
 
     @Override
     protected void onRestoreInstanceState(@NonNull final Bundle savedState) {
         super.onRestoreInstanceState(savedState);
         final Serializable serializable = savedState.getSerializable(INFO_KEY);
-        if (serializable instanceof RelatedItemInfo) {
-            this.relatedItemInfo = (RelatedItemInfo) serializable;
+        if (serializable instanceof RelatedItemsInfo) {
+            this.relatedItemsInfo = (RelatedItemsInfo) serializable;
         }
     }
 

app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedItemsInfo.java

@@ -0,0 +1,22 @@
+package org.schabi.newpipe.fragments.list.videos;
+
+import org.schabi.newpipe.extractor.InfoItem;
+import org.schabi.newpipe.extractor.ListInfo;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.stream.StreamInfo;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+public final class RelatedItemsInfo extends ListInfo<InfoItem> {
+    /**
+     * This class is used to wrap the related items of a StreamInfo into a ListInfo object.
+     *
+     * @param info the stream info from which to get related items
+     */
+    public RelatedItemsInfo(final StreamInfo info) {
+        super(info.getServiceId(), new ListLinkHandler(info.getOriginalUrl(), info.getUrl(),
+                info.getId(), Collections.emptyList(), null), info.getName());
+        setRelatedItems(new ArrayList<>(info.getRelatedItems()));
+    }
+}

app/src/main/java/org/schabi/newpipe/info_list/InfoItemBuilder.java

@@ -13,8 +13,7 @@ import org.schabi.newpipe.extractor.playlist.PlaylistInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.info_list.holder.ChannelInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.ChannelMiniInfoItemHolder;
-import org.schabi.newpipe.info_list.holder.CommentsInfoItemHolder;
-import org.schabi.newpipe.info_list.holder.CommentsMiniInfoItemHolder;
+import org.schabi.newpipe.info_list.holder.CommentInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.InfoItemHolder;
 import org.schabi.newpipe.info_list.holder.PlaylistInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.PlaylistMiniInfoItemHolder;
@@ -87,8 +86,7 @@ public class InfoItemBuilder {
                 return useMiniVariant ? new PlaylistMiniInfoItemHolder(this, parent)
                         : new PlaylistInfoItemHolder(this, parent);
             case COMMENT:
-                return useMiniVariant ? new CommentsMiniInfoItemHolder(this, parent)
-                        : new CommentsInfoItemHolder(this, parent);
+                return new CommentInfoItemHolder(this, parent);
             default:
                 throw new RuntimeException("InfoType not expected = " + infoType.name());
         }

app/src/main/java/org/schabi/newpipe/info_list/InfoListAdapter.java

@@ -21,8 +21,7 @@ import org.schabi.newpipe.info_list.holder.ChannelCardInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.ChannelGridInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.ChannelInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.ChannelMiniInfoItemHolder;
-import org.schabi.newpipe.info_list.holder.CommentsInfoItemHolder;
-import org.schabi.newpipe.info_list.holder.CommentsMiniInfoItemHolder;
+import org.schabi.newpipe.info_list.holder.CommentInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.InfoItemHolder;
 import org.schabi.newpipe.info_list.holder.PlaylistCardInfoItemHolder;
 import org.schabi.newpipe.info_list.holder.PlaylistGridInfoItemHolder;
@@ -79,8 +78,7 @@ public class InfoListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
     private static final int PLAYLIST_HOLDER_TYPE = 0x301;
     private static final int GRID_PLAYLIST_HOLDER_TYPE = 0x302;
     private static final int CARD_PLAYLIST_HOLDER_TYPE = 0x303;
-    private static final int MINI_COMMENT_HOLDER_TYPE = 0x400;
-    private static final int COMMENT_HOLDER_TYPE = 0x401;
+    private static final int COMMENT_HOLDER_TYPE = 0x400;
 
     private final LayoutInflater layoutInflater;
     private final InfoItemBuilder infoItemBuilder;
@@ -271,7 +269,7 @@ public class InfoListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
                     return PLAYLIST_HOLDER_TYPE;
                 }
             case COMMENT:
-                return useMiniVariant ? MINI_COMMENT_HOLDER_TYPE : COMMENT_HOLDER_TYPE;
+                return COMMENT_HOLDER_TYPE;
             default:
                 return -1;
         }
@@ -320,10 +318,8 @@ public class InfoListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
                 return new PlaylistGridInfoItemHolder(infoItemBuilder, parent);
             case CARD_PLAYLIST_HOLDER_TYPE:
                 return new PlaylistCardInfoItemHolder(infoItemBuilder, parent);
-            case MINI_COMMENT_HOLDER_TYPE:
-                return new CommentsMiniInfoItemHolder(infoItemBuilder, parent);
             case COMMENT_HOLDER_TYPE:
-                return new CommentsInfoItemHolder(infoItemBuilder, parent);
+                return new CommentInfoItemHolder(infoItemBuilder, parent);
             default:
                 return new FallbackViewHolder(new View(parent.getContext()));
         }

app/src/main/java/org/schabi/newpipe/info_list/holder/CommentInfoItemHolder.java

@@ -0,0 +1,188 @@
+package org.schabi.newpipe.info_list.holder;
+
+import static org.schabi.newpipe.util.ServiceHelper.getServiceById;
+
+import android.text.method.LinkMovementMethod;
+import android.text.style.URLSpan;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.FragmentActivity;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.InfoItem;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
+import org.schabi.newpipe.info_list.InfoItemBuilder;
+import org.schabi.newpipe.local.history.HistoryRecordManager;
+import org.schabi.newpipe.util.DeviceUtils;
+import org.schabi.newpipe.util.Localization;
+import org.schabi.newpipe.util.NavigationHelper;
+import org.schabi.newpipe.util.external_communication.ShareUtils;
+import org.schabi.newpipe.util.image.ImageStrategy;
+import org.schabi.newpipe.util.image.PicassoHelper;
+import org.schabi.newpipe.util.text.CommentTextOnTouchListener;
+import org.schabi.newpipe.util.text.TextEllipsizer;
+
+public class CommentInfoItemHolder extends InfoItemHolder {
+
+    private static final int COMMENT_DEFAULT_LINES = 2;
+    private final int commentHorizontalPadding;
+    private final int commentVerticalPadding;
+
+    private final RelativeLayout itemRoot;
+    private final ImageView itemThumbnailView;
+    private final TextView itemContentView;
+    private final ImageView itemThumbsUpView;
+    private final TextView itemLikesCountView;
+    private final TextView itemTitleView;
+    private final ImageView itemHeartView;
+    private final ImageView itemPinnedView;
+    private final Button repliesButton;
+
+    @NonNull
+    private final TextEllipsizer textEllipsizer;
+
+    public CommentInfoItemHolder(final InfoItemBuilder infoItemBuilder,
+                                 final ViewGroup parent) {
+        super(infoItemBuilder, R.layout.list_comment_item, parent);
+
+        itemRoot = itemView.findViewById(R.id.itemRoot);
+        itemThumbnailView = itemView.findViewById(R.id.itemThumbnailView);
+        itemContentView = itemView.findViewById(R.id.itemCommentContentView);
+        itemThumbsUpView = itemView.findViewById(R.id.detail_thumbs_up_img_view);
+        itemLikesCountView = itemView.findViewById(R.id.detail_thumbs_up_count_view);
+        itemTitleView = itemView.findViewById(R.id.itemTitleView);
+        itemHeartView = itemView.findViewById(R.id.detail_heart_image_view);
+        itemPinnedView = itemView.findViewById(R.id.detail_pinned_view);
+        repliesButton = itemView.findViewById(R.id.replies_button);
+
+        commentHorizontalPadding = (int) infoItemBuilder.getContext()
+                .getResources().getDimension(R.dimen.comments_horizontal_padding);
+        commentVerticalPadding = (int) infoItemBuilder.getContext()
+                .getResources().getDimension(R.dimen.comments_vertical_padding);
+
+        textEllipsizer = new TextEllipsizer(itemContentView, COMMENT_DEFAULT_LINES, null);
+        textEllipsizer.setStateChangeListener(isEllipsized -> {
+            if (Boolean.TRUE.equals(isEllipsized)) {
+                denyLinkFocus();
+            } else {
+                determineMovementMethod();
+            }
+        });
+    }
+
+    @Override
+    public void updateFromItem(final InfoItem infoItem,
+                               final HistoryRecordManager historyRecordManager) {
+        if (!(infoItem instanceof CommentsInfoItem)) {
+            return;
+        }
+        final CommentsInfoItem item = (CommentsInfoItem) infoItem;
+
+
+        // load the author avatar
+        PicassoHelper.loadAvatar(item.getUploaderAvatars()).into(itemThumbnailView);
+        if (ImageStrategy.shouldLoadImages()) {
+            itemThumbnailView.setVisibility(View.VISIBLE);
+            itemRoot.setPadding(commentVerticalPadding, commentVerticalPadding,
+                    commentVerticalPadding, commentVerticalPadding);
+        } else {
+            itemThumbnailView.setVisibility(View.GONE);
+            itemRoot.setPadding(commentHorizontalPadding, commentVerticalPadding,
+                    commentHorizontalPadding, commentVerticalPadding);
+        }
+        itemThumbnailView.setOnClickListener(view -> openCommentAuthor(item));
+
+
+        // setup the top row, with pinned icon, author name and comment date
+        itemPinnedView.setVisibility(item.isPinned() ? View.VISIBLE : View.GONE);
+        itemTitleView.setText(Localization.concatenateStrings(item.getUploaderName(),
+                Localization.relativeTimeOrTextual(itemBuilder.getContext(), item.getUploadDate(),
+                        item.getTextualUploadDate())));
+
+
+        // setup bottom row, with likes, heart and replies button
+        itemLikesCountView.setText(
+                Localization.likeCount(itemBuilder.getContext(), item.getLikeCount()));
+
+        itemHeartView.setVisibility(item.isHeartedByUploader() ? View.VISIBLE : View.GONE);
+
+        final boolean hasReplies = item.getReplies() != null;
+        repliesButton.setOnClickListener(hasReplies ? v -> openCommentReplies(item) : null);
+        repliesButton.setVisibility(hasReplies ? View.VISIBLE : View.GONE);
+        repliesButton.setText(hasReplies
+                ? Localization.replyCount(itemBuilder.getContext(), item.getReplyCount()) : "");
+        ((RelativeLayout.LayoutParams) itemThumbsUpView.getLayoutParams()).topMargin =
+                hasReplies ? 0 : DeviceUtils.dpToPx(6, itemBuilder.getContext());
+
+
+        // setup comment content and click listeners to expand/ellipsize it
+        textEllipsizer.setStreamingService(getServiceById(item.getServiceId()));
+        textEllipsizer.setStreamUrl(item.getUrl());
+        textEllipsizer.setContent(item.getCommentText());
+        textEllipsizer.ellipsize();
+
+        //noinspection ClickableViewAccessibility
+        itemContentView.setOnTouchListener(CommentTextOnTouchListener.INSTANCE);
+
+        itemView.setOnClickListener(view -> {
+            textEllipsizer.toggle();
+            if (itemBuilder.getOnCommentsSelectedListener() != null) {
+                itemBuilder.getOnCommentsSelectedListener().selected(item);
+            }
+        });
+
+        itemView.setOnLongClickListener(view -> {
+            if (DeviceUtils.isTv(itemBuilder.getContext())) {
+                openCommentAuthor(item);
+            } else {
+                final CharSequence text = itemContentView.getText();
+                if (text != null) {
+                    ShareUtils.copyToClipboard(itemBuilder.getContext(), text.toString());
+                }
+            }
+            return true;
+        });
+    }
+
+    private void openCommentAuthor(@NonNull final CommentsInfoItem item) {
+        NavigationHelper.openCommentAuthorIfPresent((FragmentActivity) itemBuilder.getContext(),
+                item);
+    }
+
+    private void openCommentReplies(@NonNull final CommentsInfoItem item) {
+        NavigationHelper.openCommentRepliesFragment((FragmentActivity) itemBuilder.getContext(),
+                item);
+    }
+
+    private void allowLinkFocus() {
+        itemContentView.setMovementMethod(LinkMovementMethod.getInstance());
+    }
+
+    private void denyLinkFocus() {
+        itemContentView.setMovementMethod(null);
+    }
+
+    private boolean shouldFocusLinks() {
+        if (itemView.isInTouchMode()) {
+            return false;
+        }
+
+        final URLSpan[] urls = itemContentView.getUrls();
+
+        return urls != null && urls.length != 0;
+    }
+
+    private void determineMovementMethod() {
+        if (shouldFocusLinks()) {
+            allowLinkFocus();
+        } else {
+            denyLinkFocus();
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/info_list/holder/CommentsInfoItemHolder.java

@@ -1,63 +0,0 @@
-package org.schabi.newpipe.info_list.holder;
-
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.TextView;
-
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.extractor.InfoItem;
-import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
-import org.schabi.newpipe.info_list.InfoItemBuilder;
-import org.schabi.newpipe.local.history.HistoryRecordManager;
-
-/*
- * Created by Christian Schabesberger on 12.02.17.
- *
- * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org>
- * ChannelInfoItemHolder .java is part of NewPipe.
- *
- * NewPipe is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * NewPipe is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-public class CommentsInfoItemHolder extends CommentsMiniInfoItemHolder {
-    public final TextView itemTitleView;
-    private final ImageView itemHeartView;
-    private final ImageView itemPinnedView;
-
-    public CommentsInfoItemHolder(final InfoItemBuilder infoItemBuilder, final ViewGroup parent) {
-        super(infoItemBuilder, R.layout.list_comments_item, parent);
-
-        itemTitleView = itemView.findViewById(R.id.itemTitleView);
-        itemHeartView = itemView.findViewById(R.id.detail_heart_image_view);
-        itemPinnedView = itemView.findViewById(R.id.detail_pinned_view);
-    }
-
-    @Override
-    public void updateFromItem(final InfoItem infoItem,
-                               final HistoryRecordManager historyRecordManager) {
-        super.updateFromItem(infoItem, historyRecordManager);
-
-        if (!(infoItem instanceof CommentsInfoItem)) {
-            return;
-        }
-        final CommentsInfoItem item = (CommentsInfoItem) infoItem;
-
-        itemTitleView.setText(item.getUploaderName());
-
-        itemHeartView.setVisibility(item.isHeartedByUploader() ? View.VISIBLE : View.GONE);
-
-        itemPinnedView.setVisibility(item.isPinned() ? View.VISIBLE : View.GONE);
-    }
-}

app/src/main/java/org/schabi/newpipe/info_list/holder/CommentsMiniInfoItemHolder.java

@@ -1,280 +0,0 @@
-package org.schabi.newpipe.info_list.holder;
-
-import static android.text.TextUtils.isEmpty;
-
-import android.graphics.Paint;
-import android.text.Layout;
-import android.text.method.LinkMovementMethod;
-import android.text.style.URLSpan;
-import android.util.Log;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.RelativeLayout;
-import android.widget.TextView;
-
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.text.HtmlCompat;
-
-import org.schabi.newpipe.R;
-import org.schabi.newpipe.error.ErrorUtil;
-import org.schabi.newpipe.extractor.InfoItem;
-import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.ServiceList;
-import org.schabi.newpipe.extractor.StreamingService;
-import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.stream.Description;
-import org.schabi.newpipe.info_list.InfoItemBuilder;
-import org.schabi.newpipe.local.history.HistoryRecordManager;
-import org.schabi.newpipe.util.DeviceUtils;
-import org.schabi.newpipe.util.Localization;
-import org.schabi.newpipe.util.NavigationHelper;
-import org.schabi.newpipe.util.image.ImageStrategy;
-import org.schabi.newpipe.util.image.PicassoHelper;
-import org.schabi.newpipe.util.external_communication.ShareUtils;
-import org.schabi.newpipe.util.text.CommentTextOnTouchListener;
-import org.schabi.newpipe.util.text.TextLinkifier;
-
-import java.util.function.Consumer;
-
-import io.reactivex.rxjava3.disposables.CompositeDisposable;
-
-public class CommentsMiniInfoItemHolder extends InfoItemHolder {
-    private static final String TAG = "CommentsMiniIIHolder";
-    private static final String ELLIPSIS = "…";
-
-    private static final int COMMENT_DEFAULT_LINES = 2;
-    private static final int COMMENT_EXPANDED_LINES = 1000;
-
-    private final int commentHorizontalPadding;
-    private final int commentVerticalPadding;
-
-    private final Paint paintAtContentSize;
-    private final float ellipsisWidthPx;
-
-    private final RelativeLayout itemRoot;
-    private final ImageView itemThumbnailView;
-    private final TextView itemContentView;
-    private final TextView itemLikesCountView;
-    private final TextView itemPublishedTime;
-
-    private final CompositeDisposable disposables = new CompositeDisposable();
-    @Nullable private Description commentText;
-    @Nullable private StreamingService streamService;
-    @Nullable private String streamUrl;
-
-    CommentsMiniInfoItemHolder(final InfoItemBuilder infoItemBuilder, final int layoutId,
-                               final ViewGroup parent) {
-        super(infoItemBuilder, layoutId, parent);
-
-        itemRoot = itemView.findViewById(R.id.itemRoot);
-        itemThumbnailView = itemView.findViewById(R.id.itemThumbnailView);
-        itemLikesCountView = itemView.findViewById(R.id.detail_thumbs_up_count_view);
-        itemPublishedTime = itemView.findViewById(R.id.itemPublishedTime);
-        itemContentView = itemView.findViewById(R.id.itemCommentContentView);
-
-        commentHorizontalPadding = (int) infoItemBuilder.getContext()
-                .getResources().getDimension(R.dimen.comments_horizontal_padding);
-        commentVerticalPadding = (int) infoItemBuilder.getContext()
-                .getResources().getDimension(R.dimen.comments_vertical_padding);
-
-        paintAtContentSize = new Paint();
-        paintAtContentSize.setTextSize(itemContentView.getTextSize());
-        ellipsisWidthPx = paintAtContentSize.measureText(ELLIPSIS);
-    }
-
-    public CommentsMiniInfoItemHolder(final InfoItemBuilder infoItemBuilder,
-                                      final ViewGroup parent) {
-        this(infoItemBuilder, R.layout.list_comments_mini_item, parent);
-    }
-
-    @Override
-    public void updateFromItem(final InfoItem infoItem,
-                               final HistoryRecordManager historyRecordManager) {
-        if (!(infoItem instanceof CommentsInfoItem)) {
-            return;
-        }
-        final CommentsInfoItem item = (CommentsInfoItem) infoItem;
-
-        PicassoHelper.loadAvatar(item.getUploaderAvatars()).into(itemThumbnailView);
-        if (ImageStrategy.shouldLoadImages()) {
-            itemThumbnailView.setVisibility(View.VISIBLE);
-            itemRoot.setPadding(commentVerticalPadding, commentVerticalPadding,
-                    commentVerticalPadding, commentVerticalPadding);
-        } else {
-            itemThumbnailView.setVisibility(View.GONE);
-            itemRoot.setPadding(commentHorizontalPadding, commentVerticalPadding,
-                    commentHorizontalPadding, commentVerticalPadding);
-        }
-
-
-        itemThumbnailView.setOnClickListener(view -> openCommentAuthor(item));
-
-        try {
-            streamService = NewPipe.getService(item.getServiceId());
-        } catch (final ExtractionException e) {
-            // should never happen
-            ErrorUtil.showUiErrorSnackbar(itemBuilder.getContext(), "Getting StreamingService", e);
-            Log.w(TAG, "Cannot obtain service from comment service id, defaulting to YouTube", e);
-            streamService = ServiceList.YouTube;
-        }
-        streamUrl = item.getUrl();
-        commentText = item.getCommentText();
-        ellipsize();
-
-        //noinspection ClickableViewAccessibility
-        itemContentView.setOnTouchListener(CommentTextOnTouchListener.INSTANCE);
-
-        if (item.getLikeCount() >= 0) {
-            itemLikesCountView.setText(
-                    Localization.shortCount(
-                            itemBuilder.getContext(),
-                            item.getLikeCount()));
-        } else {
-            itemLikesCountView.setText("-");
-        }
-
-        if (item.getUploadDate() != null) {
-            itemPublishedTime.setText(Localization.relativeTime(item.getUploadDate()
-                    .offsetDateTime()));
-        } else {
-            itemPublishedTime.setText(item.getTextualUploadDate());
-        }
-
-        itemView.setOnClickListener(view -> {
-            toggleEllipsize();
-            if (itemBuilder.getOnCommentsSelectedListener() != null) {
-                itemBuilder.getOnCommentsSelectedListener().selected(item);
-            }
-        });
-
-
-        itemView.setOnLongClickListener(view -> {
-            if (DeviceUtils.isTv(itemBuilder.getContext())) {
-                openCommentAuthor(item);
-            } else {
-                final CharSequence text = itemContentView.getText();
-                if (text != null) {
-                    ShareUtils.copyToClipboard(itemBuilder.getContext(), text.toString());
-                }
-            }
-            return true;
-        });
-    }
-
-    private void openCommentAuthor(final CommentsInfoItem item) {
-        if (isEmpty(item.getUploaderUrl())) {
-            return;
-        }
-        final AppCompatActivity activity = (AppCompatActivity) itemBuilder.getContext();
-        try {
-            NavigationHelper.openChannelFragment(
-                    activity.getSupportFragmentManager(),
-                    item.getServiceId(),
-                    item.getUploaderUrl(),
-                    item.getUploaderName());
-        } catch (final Exception e) {
-            ErrorUtil.showUiErrorSnackbar(activity, "Opening channel fragment", e);
-        }
-    }
-
-    private void allowLinkFocus() {
-        itemContentView.setMovementMethod(LinkMovementMethod.getInstance());
-    }
-
-    private void denyLinkFocus() {
-        itemContentView.setMovementMethod(null);
-    }
-
-    private boolean shouldFocusLinks() {
-        if (itemView.isInTouchMode()) {
-            return false;
-        }
-
-        final URLSpan[] urls = itemContentView.getUrls();
-
-        return urls != null && urls.length != 0;
-    }
-
-    private void determineMovementMethod() {
-        if (shouldFocusLinks()) {
-            allowLinkFocus();
-        } else {
-            denyLinkFocus();
-        }
-    }
-
-    private void ellipsize() {
-        itemContentView.setMaxLines(COMMENT_EXPANDED_LINES);
-        linkifyCommentContentView(v -> {
-            boolean hasEllipsis = false;
-
-            final CharSequence charSeqText = itemContentView.getText();
-            if (charSeqText != null && itemContentView.getLineCount() > COMMENT_DEFAULT_LINES) {
-                // Note that converting to String removes spans (i.e. links), but that's something
-                // we actually want since when the text is ellipsized we want all clicks on the
-                // comment to expand the comment, not to open links.
-                final String text = charSeqText.toString();
-
-                final Layout layout = itemContentView.getLayout();
-                final float lineWidth = layout.getLineWidth(COMMENT_DEFAULT_LINES - 1);
-                final float layoutWidth = layout.getWidth();
-                final int lineStart = layout.getLineStart(COMMENT_DEFAULT_LINES - 1);
-                final int lineEnd = layout.getLineEnd(COMMENT_DEFAULT_LINES - 1);
-
-                // remove characters up until there is enough space for the ellipsis
-                // (also summing 2 more pixels, just to be sure to avoid float rounding errors)
-                int end = lineEnd;
-                float removedCharactersWidth = 0.0f;
-                while (lineWidth - removedCharactersWidth + ellipsisWidthPx + 2.0f > layoutWidth
-                        && end >= lineStart) {
-                    end -= 1;
-                    // recalculate each time to account for ligatures or other similar things
-                    removedCharactersWidth = paintAtContentSize.measureText(
-                            text.substring(end, lineEnd));
-                }
-
-                // remove trailing spaces and newlines
-                while (end > 0 && Character.isWhitespace(text.charAt(end - 1))) {
-                    end -= 1;
-                }
-
-                final String newVal = text.substring(0, end) + ELLIPSIS;
-                itemContentView.setText(newVal);
-                hasEllipsis = true;
-            }
-
-            itemContentView.setMaxLines(COMMENT_DEFAULT_LINES);
-            if (hasEllipsis) {
-                denyLinkFocus();
-            } else {
-                determineMovementMethod();
-            }
-        });
-    }
-
-    private void toggleEllipsize() {
-        final CharSequence text = itemContentView.getText();
-        if (!isEmpty(text) && text.charAt(text.length() - 1) == ELLIPSIS.charAt(0)) {
-            expand();
-        } else if (itemContentView.getLineCount() > COMMENT_DEFAULT_LINES) {
-            ellipsize();
-        }
-    }
-
-    private void expand() {
-        itemContentView.setMaxLines(COMMENT_EXPANDED_LINES);
-        linkifyCommentContentView(v -> determineMovementMethod());
-    }
-
-    private void linkifyCommentContentView(@Nullable final Consumer<TextView> onCompletion) {
-        disposables.clear();
-        if (commentText != null) {
-            TextLinkifier.fromDescription(itemContentView, commentText,
-                    HtmlCompat.FROM_HTML_MODE_LEGACY, streamService, streamUrl, disposables,
-                    onCompletion);
-        }
-    }
-}

app/src/main/java/org/schabi/newpipe/info_list/holder/StreamInfoItemHolder.java

@@ -12,10 +12,6 @@ import org.schabi.newpipe.info_list.InfoItemBuilder;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
 import org.schabi.newpipe.util.Localization;
 
-import androidx.preference.PreferenceManager;
-
-import static org.schabi.newpipe.MainActivity.DEBUG;
-
 /*
  * Created by Christian Schabesberger on 01.08.16.
  * <p>
@@ -81,7 +77,9 @@ public class StreamInfoItemHolder extends StreamMiniInfoItemHolder {
             }
         }
 
-        final String uploadDate = getFormattedRelativeUploadDate(infoItem);
+        final String uploadDate = Localization.relativeTimeOrTextual(itemBuilder.getContext(),
+                infoItem.getUploadDate(),
+                infoItem.getTextualUploadDate());
         if (!TextUtils.isEmpty(uploadDate)) {
             if (viewsAndDate.isEmpty()) {
                 return uploadDate;
@@ -92,20 +90,4 @@ public class StreamInfoItemHolder extends StreamMiniInfoItemHolder {
 
         return viewsAndDate;
     }
-
-    private String getFormattedRelativeUploadDate(final StreamInfoItem infoItem) {
-        if (infoItem.getUploadDate() != null) {
-            String formattedRelativeTime = Localization
-                    .relativeTime(infoItem.getUploadDate().offsetDateTime());
-
-            if (DEBUG && PreferenceManager.getDefaultSharedPreferences(itemBuilder.getContext())
-                    .getBoolean(itemBuilder.getContext()
-                            .getString(R.string.show_original_time_ago_key), false)) {
-                formattedRelativeTime += " (" + infoItem.getTextualUploadDate() + ")";
-            }
-            return formattedRelativeTime;
-        } else {
-            return infoItem.getTextualUploadDate();
-        }
-    }
 }

app/src/main/java/org/schabi/newpipe/ktx/Bundle.kt

@@ -0,0 +1,9 @@
+package org.schabi.newpipe.ktx
+
+import android.os.Bundle
+import android.os.Parcelable
+import androidx.core.os.BundleCompat
+
+inline fun <reified T : Parcelable> Bundle.parcelableArrayList(key: String?): ArrayList<T>? {
+    return BundleCompat.getParcelableArrayList(this, key, T::class.java)
+}

app/src/main/java/org/schabi/newpipe/local/LocalItemListAdapter.java

@@ -14,6 +14,7 @@ import org.schabi.newpipe.database.LocalItem;
 import org.schabi.newpipe.database.stream.model.StreamStateEntity;
 import org.schabi.newpipe.info_list.ItemViewMode;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
+import org.schabi.newpipe.local.holder.LocalBookmarkPlaylistItemHolder;
 import org.schabi.newpipe.local.holder.LocalItemHolder;
 import org.schabi.newpipe.local.holder.LocalPlaylistCardItemHolder;
 import org.schabi.newpipe.local.holder.LocalPlaylistGridItemHolder;
@@ -24,6 +25,7 @@ import org.schabi.newpipe.local.holder.LocalPlaylistStreamItemHolder;
 import org.schabi.newpipe.local.holder.LocalStatisticStreamCardItemHolder;
 import org.schabi.newpipe.local.holder.LocalStatisticStreamGridItemHolder;
 import org.schabi.newpipe.local.holder.LocalStatisticStreamItemHolder;
+import org.schabi.newpipe.local.holder.RemoteBookmarkPlaylistItemHolder;
 import org.schabi.newpipe.local.holder.RemotePlaylistCardItemHolder;
 import org.schabi.newpipe.local.holder.RemotePlaylistGridItemHolder;
 import org.schabi.newpipe.local.holder.RemotePlaylistItemHolder;
@@ -73,10 +75,12 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
     private static final int LOCAL_PLAYLIST_HOLDER_TYPE = 0x2000;
     private static final int LOCAL_PLAYLIST_GRID_HOLDER_TYPE = 0x2001;
     private static final int LOCAL_PLAYLIST_CARD_HOLDER_TYPE = 0x2002;
+    private static final int LOCAL_BOOKMARK_PLAYLIST_HOLDER_TYPE = 0x2003;
 
     private static final int REMOTE_PLAYLIST_HOLDER_TYPE = 0x3000;
     private static final int REMOTE_PLAYLIST_GRID_HOLDER_TYPE = 0x3001;
     private static final int REMOTE_PLAYLIST_CARD_HOLDER_TYPE = 0x3002;
+    private static final int REMOTE_BOOKMARK_PLAYLIST_HOLDER_TYPE = 0x3003;
 
     private final LocalItemBuilder localItemBuilder;
     private final ArrayList<LocalItem> localItems;
@@ -87,6 +91,7 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
     private View header = null;
     private View footer = null;
     private ItemViewMode itemViewMode = ItemViewMode.LIST;
+    private boolean useItemHandle = false;
 
     public LocalItemListAdapter(final Context context) {
         recordManager = new HistoryRecordManager(context);
@@ -180,6 +185,10 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
         this.itemViewMode = itemViewMode;
     }
 
+    public void setUseItemHandle(final boolean useItemHandle) {
+        this.useItemHandle = useItemHandle;
+    }
+
     public void setHeader(final View header) {
         final boolean changed = header != this.header;
         this.header = header;
@@ -257,7 +266,9 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
         final LocalItem item = localItems.get(position);
         switch (item.getLocalItemType()) {
             case PLAYLIST_LOCAL_ITEM:
-                if (itemViewMode == ItemViewMode.CARD) {
+                if (useItemHandle) {
+                    return LOCAL_BOOKMARK_PLAYLIST_HOLDER_TYPE;
+                } else if (itemViewMode == ItemViewMode.CARD) {
                     return LOCAL_PLAYLIST_CARD_HOLDER_TYPE;
                 } else if (itemViewMode == ItemViewMode.GRID) {
                     return LOCAL_PLAYLIST_GRID_HOLDER_TYPE;
@@ -265,7 +276,9 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
                     return LOCAL_PLAYLIST_HOLDER_TYPE;
                 }
             case PLAYLIST_REMOTE_ITEM:
-                if (itemViewMode == ItemViewMode.CARD) {
+                if (useItemHandle) {
+                    return REMOTE_BOOKMARK_PLAYLIST_HOLDER_TYPE;
+                } else if (itemViewMode == ItemViewMode.CARD) {
                     return REMOTE_PLAYLIST_CARD_HOLDER_TYPE;
                 } else if (itemViewMode == ItemViewMode.GRID) {
                     return REMOTE_PLAYLIST_GRID_HOLDER_TYPE;
@@ -314,12 +327,16 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
                 return new LocalPlaylistGridItemHolder(localItemBuilder, parent);
             case LOCAL_PLAYLIST_CARD_HOLDER_TYPE:
                 return new LocalPlaylistCardItemHolder(localItemBuilder, parent);
+            case LOCAL_BOOKMARK_PLAYLIST_HOLDER_TYPE:
+                return new LocalBookmarkPlaylistItemHolder(localItemBuilder, parent);
             case REMOTE_PLAYLIST_HOLDER_TYPE:
                 return new RemotePlaylistItemHolder(localItemBuilder, parent);
             case REMOTE_PLAYLIST_GRID_HOLDER_TYPE:
                 return new RemotePlaylistGridItemHolder(localItemBuilder, parent);
             case REMOTE_PLAYLIST_CARD_HOLDER_TYPE:
                 return new RemotePlaylistCardItemHolder(localItemBuilder, parent);
+            case REMOTE_BOOKMARK_PLAYLIST_HOLDER_TYPE:
+                return new RemoteBookmarkPlaylistItemHolder(localItemBuilder, parent);
             case STREAM_PLAYLIST_HOLDER_TYPE:
                 return new LocalPlaylistStreamItemHolder(localItemBuilder, parent);
             case STREAM_PLAYLIST_GRID_HOLDER_TYPE:

app/src/main/java/org/schabi/newpipe/local/bookmark/BookmarkFragment.java

@@ -1,10 +1,13 @@
 package org.schabi.newpipe.local.bookmark;
 
+import static org.schabi.newpipe.local.bookmark.MergedPlaylistManager.getMergedOrderedPlaylists;
+
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.text.InputType;
 import android.util.Log;
+import android.util.Pair;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -13,6 +16,8 @@ import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
 import androidx.fragment.app.FragmentManager;
+import androidx.recyclerview.widget.ItemTouchHelper;
+import androidx.recyclerview.widget.RecyclerView;
 
 import org.reactivestreams.Subscriber;
 import org.reactivestreams.Subscription;
@@ -27,29 +32,45 @@ import org.schabi.newpipe.databinding.DialogEditTextBinding;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.local.BaseLocalListFragment;
+import org.schabi.newpipe.local.holder.LocalBookmarkPlaylistItemHolder;
+import org.schabi.newpipe.local.holder.RemoteBookmarkPlaylistItemHolder;
 import org.schabi.newpipe.local.playlist.LocalPlaylistManager;
 import org.schabi.newpipe.local.playlist.RemotePlaylistManager;
+import org.schabi.newpipe.util.debounce.DebounceSavable;
+import org.schabi.newpipe.util.debounce.DebounceSaver;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.OnClickGesture;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import icepick.State;
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
-import io.reactivex.rxjava3.core.Flowable;
-import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import io.reactivex.rxjava3.disposables.Disposable;
 
-public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistLocalItem>, Void> {
+public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistLocalItem>, Void>
+        implements DebounceSavable {
+
+    private static final int MINIMUM_INITIAL_DRAG_VELOCITY = 12;
     @State
-    protected Parcelable itemsListState;
+    Parcelable itemsListState;
 
     private Subscription databaseSubscription;
     private CompositeDisposable disposables = new CompositeDisposable();
     private LocalPlaylistManager localPlaylistManager;
     private RemotePlaylistManager remotePlaylistManager;
+    private ItemTouchHelper itemTouchHelper;
+
+    /* Have the bookmarked playlists been fully loaded from db */
+    private AtomicBoolean isLoadingComplete;
+
+    /* Gives enough time to avoid interrupting user sorting operations */
+    @Nullable
+    private DebounceSaver debounceSaver;
+
+    private List<Pair<Long, LocalItem.LocalItemType>> deletedItems;
 
     ///////////////////////////////////////////////////////////////////////////
     // Fragment LifeCycle - Creation
@@ -65,6 +86,11 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
         localPlaylistManager = new LocalPlaylistManager(database);
         remotePlaylistManager = new RemotePlaylistManager(database);
         disposables = new CompositeDisposable();
+
+        isLoadingComplete = new AtomicBoolean();
+        debounceSaver = new DebounceSaver(3000, this);
+
+        deletedItems = new ArrayList<>();
     }
 
     @Nullable
@@ -91,10 +117,20 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
     // Fragment LifeCycle - Views
     ///////////////////////////////////////////////////////////////////////////
 
+    @Override
+    protected void initViews(final View rootView, final Bundle savedInstanceState) {
+        super.initViews(rootView, savedInstanceState);
+
+        itemListAdapter.setUseItemHandle(true);
+    }
+
     @Override
     protected void initListeners() {
         super.initListeners();
 
+        itemTouchHelper = new ItemTouchHelper(getItemTouchCallback());
+        itemTouchHelper.attachToRecyclerView(itemsList);
+
         itemListAdapter.setSelectedListener(new OnClickGesture<>() {
             @Override
             public void selected(final LocalItem selectedItem) {
@@ -102,7 +138,7 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
 
                 if (selectedItem instanceof PlaylistMetadataEntry) {
                     final PlaylistMetadataEntry entry = ((PlaylistMetadataEntry) selectedItem);
-                    NavigationHelper.openLocalPlaylistFragment(fragmentManager, entry.uid,
+                    NavigationHelper.openLocalPlaylistFragment(fragmentManager, entry.getUid(),
                             entry.name);
 
                 } else if (selectedItem instanceof PlaylistRemoteEntity) {
@@ -123,6 +159,14 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
                     showRemoteDeleteDialog((PlaylistRemoteEntity) selectedItem);
                 }
             }
+
+            @Override
+            public void drag(final LocalItem selectedItem,
+                             final RecyclerView.ViewHolder viewHolder) {
+                if (itemTouchHelper != null) {
+                    itemTouchHelper.startDrag(viewHolder);
+                }
+            }
         });
     }
 
@@ -134,8 +178,13 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
     public void startLoading(final boolean forceLoad) {
         super.startLoading(forceLoad);
 
-        Flowable.combineLatest(localPlaylistManager.getPlaylists(),
-                remotePlaylistManager.getPlaylists(), PlaylistLocalItem::merge)
+        if (debounceSaver != null) {
+            disposables.add(debounceSaver.getDebouncedSaver());
+            debounceSaver.setNoChangesToSave();
+        }
+        isLoadingComplete.set(false);
+
+        getMergedOrderedPlaylists(localPlaylistManager, remotePlaylistManager)
                 .onBackpressureLatest()
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(getPlaylistsSubscriber());
@@ -149,6 +198,9 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
     public void onPause() {
         super.onPause();
         itemsListState = itemsList.getLayoutManager().onSaveInstanceState();
+
+        // Save on exit
+        saveImmediate();
     }
 
     @Override
@@ -163,19 +215,27 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
         }
 
         databaseSubscription = null;
+        itemTouchHelper = null;
     }
 
     @Override
     public void onDestroy() {
         super.onDestroy();
+        if (debounceSaver != null) {
+            debounceSaver.getDebouncedSaveSignal().onComplete();
+        }
         if (disposables != null) {
             disposables.dispose();
         }
 
+        debounceSaver = null;
         disposables = null;
         localPlaylistManager = null;
         remotePlaylistManager = null;
         itemsListState = null;
+
+        isLoadingComplete = null;
+        deletedItems = null;
     }
 
     ///////////////////////////////////////////////////////////////////////////
@@ -183,10 +243,12 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
     ///////////////////////////////////////////////////////////////////////////
 
     private Subscriber<List<PlaylistLocalItem>> getPlaylistsSubscriber() {
-        return new Subscriber<List<PlaylistLocalItem>>() {
+        return new Subscriber<>() {
             @Override
             public void onSubscribe(final Subscription s) {
                 showLoading();
+                isLoadingComplete.set(false);
+
                 if (databaseSubscription != null) {
                     databaseSubscription.cancel();
                 }
@@ -196,7 +258,10 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
 
             @Override
             public void onNext(final List<PlaylistLocalItem> subscriptions) {
-                handleResult(subscriptions);
+                if (debounceSaver == null || !debounceSaver.getIsModified()) {
+                    handleResult(subscriptions);
+                    isLoadingComplete.set(true);
+                }
                 if (databaseSubscription != null) {
                     databaseSubscription.request(1);
                 }
@@ -209,7 +274,8 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
             }
 
             @Override
-            public void onComplete() { }
+            public void onComplete() {
+            }
         };
     }
 
@@ -244,12 +310,183 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
         }
     }
 
+    /*//////////////////////////////////////////////////////////////////////////
+    // Playlist Metadata Manipulation
+    //////////////////////////////////////////////////////////////////////////*/
+
+    private void changeLocalPlaylistName(final long id, final String name) {
+        if (localPlaylistManager == null) {
+            return;
+        }
+
+        if (DEBUG) {
+            Log.d(TAG, "Updating playlist id=[" + id + "] "
+                    + "with new name=[" + name + "] items");
+        }
+
+        final Disposable disposable = localPlaylistManager.renamePlaylist(id, name)
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(longs -> { /*Do nothing on success*/ }, throwable -> showError(
+                        new ErrorInfo(throwable,
+                                UserAction.REQUESTED_BOOKMARK,
+                                "Changing playlist name")));
+        disposables.add(disposable);
+    }
+
+    private void deleteItem(final PlaylistLocalItem item) {
+        if (itemListAdapter == null) {
+            return;
+        }
+        itemListAdapter.removeItem(item);
+
+        if (item instanceof PlaylistMetadataEntry) {
+            deletedItems.add(new Pair<>(item.getUid(),
+                    LocalItem.LocalItemType.PLAYLIST_LOCAL_ITEM));
+        } else if (item instanceof PlaylistRemoteEntity) {
+            deletedItems.add(new Pair<>(item.getUid(),
+                    LocalItem.LocalItemType.PLAYLIST_REMOTE_ITEM));
+        }
+
+        if (debounceSaver != null) {
+            debounceSaver.setHasChangesToSave();
+            saveImmediate();
+        }
+    }
+
+    @Override
+    public void saveImmediate() {
+        if (itemListAdapter == null) {
+            return;
+        }
+
+        // List must be loaded and modified in order to save
+        if (isLoadingComplete == null || debounceSaver == null
+                || !isLoadingComplete.get() || !debounceSaver.getIsModified()) {
+            return;
+        }
+
+        final List<LocalItem> items = itemListAdapter.getItemsList();
+        final List<PlaylistMetadataEntry> localItemsUpdate = new ArrayList<>();
+        final List<Long> localItemsDeleteUid = new ArrayList<>();
+        final List<PlaylistRemoteEntity> remoteItemsUpdate = new ArrayList<>();
+        final List<Long> remoteItemsDeleteUid = new ArrayList<>();
+
+        // Calculate display index
+        for (int i = 0; i < items.size(); i++) {
+            final LocalItem item = items.get(i);
+
+            if (item instanceof PlaylistMetadataEntry
+                    && ((PlaylistMetadataEntry) item).getDisplayIndex() != i) {
+                ((PlaylistMetadataEntry) item).setDisplayIndex(i);
+                localItemsUpdate.add((PlaylistMetadataEntry) item);
+            } else if (item instanceof PlaylistRemoteEntity
+                    && ((PlaylistRemoteEntity) item).getDisplayIndex() != i) {
+                ((PlaylistRemoteEntity) item).setDisplayIndex(i);
+                remoteItemsUpdate.add((PlaylistRemoteEntity) item);
+            }
+        }
+
+        // Find deleted items
+        for (final Pair<Long, LocalItem.LocalItemType> item : deletedItems) {
+            if (item.second.equals(LocalItem.LocalItemType.PLAYLIST_LOCAL_ITEM)) {
+                localItemsDeleteUid.add(item.first);
+            } else if (item.second.equals(LocalItem.LocalItemType.PLAYLIST_REMOTE_ITEM)) {
+                remoteItemsDeleteUid.add(item.first);
+            }
+        }
+
+        deletedItems.clear();
+
+        // 1. Update local playlists
+        // 2. Update remote playlists
+        // 3. Set NoChangesToSave
+        disposables.add(localPlaylistManager.updatePlaylists(localItemsUpdate, localItemsDeleteUid)
+                .mergeWith(remotePlaylistManager.updatePlaylists(
+                        remoteItemsUpdate, remoteItemsDeleteUid))
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(() -> {
+                            if (debounceSaver != null) {
+                                debounceSaver.setNoChangesToSave();
+                            }
+                        },
+                        throwable -> showError(new ErrorInfo(throwable,
+                                UserAction.REQUESTED_BOOKMARK, "Saving playlist"))
+                ));
+
+    }
+
+    private ItemTouchHelper.SimpleCallback getItemTouchCallback() {
+        // if adding grid layout, also include ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT
+        // with an `if (shouldUseGridLayout()) ...`
+        return new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN,
+                ItemTouchHelper.ACTION_STATE_IDLE) {
+            @Override
+            public int interpolateOutOfBoundsScroll(@NonNull final RecyclerView recyclerView,
+                                                    final int viewSize,
+                                                    final int viewSizeOutOfBounds,
+                                                    final int totalSize,
+                                                    final long msSinceStartScroll) {
+                final int standardSpeed = super.interpolateOutOfBoundsScroll(recyclerView,
+                        viewSize, viewSizeOutOfBounds, totalSize, msSinceStartScroll);
+                final int minimumAbsVelocity = Math.max(MINIMUM_INITIAL_DRAG_VELOCITY,
+                        Math.abs(standardSpeed));
+                return minimumAbsVelocity * (int) Math.signum(viewSizeOutOfBounds);
+            }
+
+            @Override
+            public boolean onMove(@NonNull final RecyclerView recyclerView,
+                                  @NonNull final RecyclerView.ViewHolder source,
+                                  @NonNull final RecyclerView.ViewHolder target) {
+
+                // Allow swap LocalBookmarkPlaylistItemHolder and RemoteBookmarkPlaylistItemHolder.
+                if (itemListAdapter == null
+                        || source.getItemViewType() != target.getItemViewType()
+                        && !(
+                        (
+                                (source instanceof LocalBookmarkPlaylistItemHolder)
+                                        || (source instanceof RemoteBookmarkPlaylistItemHolder)
+                        )
+                                && (
+                                (target instanceof LocalBookmarkPlaylistItemHolder)
+                                        || (target instanceof RemoteBookmarkPlaylistItemHolder)
+                        ))
+                ) {
+                    return false;
+                }
+
+                final int sourceIndex = source.getBindingAdapterPosition();
+                final int targetIndex = target.getBindingAdapterPosition();
+                final boolean isSwapped = itemListAdapter.swapItems(sourceIndex, targetIndex);
+                if (isSwapped && debounceSaver != null) {
+                    debounceSaver.setHasChangesToSave();
+                }
+                return isSwapped;
+            }
+
+            @Override
+            public boolean isLongPressDragEnabled() {
+                return false;
+            }
+
+            @Override
+            public boolean isItemViewSwipeEnabled() {
+                return false;
+            }
+
+            @Override
+            public void onSwiped(@NonNull final RecyclerView.ViewHolder viewHolder,
+                                 final int swipeDir) {
+                // Do nothing.
+            }
+        };
+    }
+
     ///////////////////////////////////////////////////////////////////////////
     // Utils
     ///////////////////////////////////////////////////////////////////////////
 
     private void showRemoteDeleteDialog(final PlaylistRemoteEntity item) {
-        showDeleteDialog(item.getName(), remotePlaylistManager.deletePlaylist(item.getUid()));
+        showDeleteDialog(item.getName(), item);
     }
 
     private void showLocalDialog(final PlaylistMetadataEntry selectedItem) {
@@ -257,7 +494,7 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
         final String delete = getString(R.string.delete);
         final String unsetThumbnail = getString(R.string.unset_playlist_thumbnail);
         final boolean isThumbnailPermanent = localPlaylistManager
-                .getIsPlaylistThumbnailPermanent(selectedItem.uid);
+                .getIsPlaylistThumbnailPermanent(selectedItem.getUid());
 
         final ArrayList<String> items = new ArrayList<>();
         items.add(rename);
@@ -270,13 +507,12 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
             if (items.get(index).equals(rename)) {
                 showRenameDialog(selectedItem);
             } else if (items.get(index).equals(delete)) {
-                showDeleteDialog(selectedItem.name,
-                        localPlaylistManager.deletePlaylist(selectedItem.uid));
+                showDeleteDialog(selectedItem.name, selectedItem);
             } else if (isThumbnailPermanent && items.get(index).equals(unsetThumbnail)) {
                 final long thumbnailStreamId = localPlaylistManager
-                        .getAutomaticPlaylistThumbnailStreamId(selectedItem.uid);
+                        .getAutomaticPlaylistThumbnailStreamId(selectedItem.getUid());
                 localPlaylistManager
-                        .changePlaylistThumbnail(selectedItem.uid, thumbnailStreamId, false)
+                        .changePlaylistThumbnail(selectedItem.getUid(), thumbnailStreamId, false)
                         .observeOn(AndroidSchedulers.mainThread())
                         .subscribe();
             }
@@ -298,13 +534,13 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
                 .setView(dialogBinding.getRoot())
                 .setPositiveButton(R.string.rename_playlist, (dialog, which) ->
                         changeLocalPlaylistName(
-                                selectedItem.uid,
+                                selectedItem.getUid(),
                                 dialogBinding.dialogEditText.getText().toString()))
                 .setNegativeButton(R.string.cancel, null)
                 .show();
     }
 
-    private void showDeleteDialog(final String name, final Single<Integer> deleteReactor) {
+    private void showDeleteDialog(final String name, final PlaylistLocalItem item) {
         if (activity == null || disposables == null) {
             return;
         }
@@ -313,35 +549,8 @@ public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistL
                 .setTitle(name)
                 .setMessage(R.string.delete_playlist_prompt)
                 .setCancelable(true)
-                .setPositiveButton(R.string.delete, (dialog, i) ->
-                        disposables.add(deleteReactor
-                                .observeOn(AndroidSchedulers.mainThread())
-                                .subscribe(ignored -> { /*Do nothing on success*/ }, throwable ->
-                                        showError(new ErrorInfo(throwable,
-                                                UserAction.REQUESTED_BOOKMARK,
-                                                "Deleting playlist")))))
+                .setPositiveButton(R.string.delete, (dialog, i) -> deleteItem(item))
                 .setNegativeButton(R.string.cancel, null)
                 .show();
     }
-
-    private void changeLocalPlaylistName(final long id, final String name) {
-        if (localPlaylistManager == null) {
-            return;
-        }
-
-        if (DEBUG) {
-            Log.d(TAG, "Updating playlist id=[" + id + "] "
-                    + "with new name=[" + name + "] items");
-        }
-
-        localPlaylistManager.renamePlaylist(id, name);
-        final Disposable disposable = localPlaylistManager.renamePlaylist(id, name)
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(longs -> { /*Do nothing on success*/ }, throwable -> showError(
-                        new ErrorInfo(throwable,
-                                UserAction.REQUESTED_BOOKMARK,
-                                "Changing playlist name")));
-        disposables.add(disposable);
-    }
 }
-

app/src/main/java/org/schabi/newpipe/local/bookmark/MergedPlaylistManager.java

@@ -0,0 +1,95 @@
+package org.schabi.newpipe.local.bookmark;
+
+import org.schabi.newpipe.database.playlist.PlaylistLocalItem;
+import org.schabi.newpipe.database.playlist.PlaylistMetadataEntry;
+import org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity;
+import org.schabi.newpipe.local.playlist.LocalPlaylistManager;
+import org.schabi.newpipe.local.playlist.RemotePlaylistManager;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+import io.reactivex.rxjava3.core.Flowable;
+
+/**
+ * Takes care of remote and local playlists at once, hence "merged".
+ */
+public final class MergedPlaylistManager {
+
+    private MergedPlaylistManager() {
+    }
+
+    public static Flowable<List<PlaylistLocalItem>> getMergedOrderedPlaylists(
+            final LocalPlaylistManager localPlaylistManager,
+            final RemotePlaylistManager remotePlaylistManager) {
+        return Flowable.combineLatest(
+                localPlaylistManager.getPlaylists(),
+                remotePlaylistManager.getPlaylists(),
+                MergedPlaylistManager::merge
+        );
+    }
+
+    /**
+     * Merge localPlaylists and remotePlaylists by the display index.
+     * If two items have the same display index, sort them in {@code CASE_INSENSITIVE_ORDER}.
+     *
+     * @param localPlaylists  local playlists, already sorted by display index
+     * @param remotePlaylists remote playlists, already sorted by display index
+     * @return merged playlists
+     */
+    public static List<PlaylistLocalItem> merge(
+            final List<PlaylistMetadataEntry> localPlaylists,
+            final List<PlaylistRemoteEntity> remotePlaylists) {
+
+        // This algorithm is similar to the merge operation in merge sort.
+        final List<PlaylistLocalItem> result = new ArrayList<>(
+                localPlaylists.size() + remotePlaylists.size());
+        final List<PlaylistLocalItem> itemsWithSameIndex = new ArrayList<>();
+
+        int i = 0;
+        int j = 0;
+        while (i < localPlaylists.size()) {
+            while (j < remotePlaylists.size()) {
+                if (remotePlaylists.get(j).getDisplayIndex()
+                        <= localPlaylists.get(i).getDisplayIndex()) {
+                    addItem(result, remotePlaylists.get(j), itemsWithSameIndex);
+                    j++;
+                } else {
+                    break;
+                }
+            }
+            addItem(result, localPlaylists.get(i), itemsWithSameIndex);
+            i++;
+        }
+        while (j < remotePlaylists.size()) {
+            addItem(result, remotePlaylists.get(j), itemsWithSameIndex);
+            j++;
+        }
+        addItemsWithSameIndex(result, itemsWithSameIndex);
+
+        return result;
+    }
+
+    private static void addItem(final List<PlaylistLocalItem> result,
+                                final PlaylistLocalItem item,
+                                final List<PlaylistLocalItem> itemsWithSameIndex) {
+        if (!itemsWithSameIndex.isEmpty()
+                && itemsWithSameIndex.get(0).getDisplayIndex() != item.getDisplayIndex()) {
+            // The new item has a different display index, add previous items with same
+            // index to the result.
+            addItemsWithSameIndex(result, itemsWithSameIndex);
+            itemsWithSameIndex.clear();
+        }
+        itemsWithSameIndex.add(item);
+    }
+
+    private static void addItemsWithSameIndex(final List<PlaylistLocalItem> result,
+                                              final List<PlaylistLocalItem> itemsWithSameIndex) {
+        Collections.sort(itemsWithSameIndex,
+                Comparator.comparing(PlaylistLocalItem::getOrderingName,
+                        Comparator.nullsLast(String.CASE_INSENSITIVE_ORDER)));
+        result.addAll(itemsWithSameIndex);
+    }
+}

app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java

@@ -155,14 +155,14 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
 
         final Toast successToast = Toast.makeText(getContext(), toastText, Toast.LENGTH_SHORT);
 
-        playlistDisposables.add(manager.appendToPlaylist(playlist.uid, streams)
+        playlistDisposables.add(manager.appendToPlaylist(playlist.getUid(), streams)
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(ignored -> {
                     successToast.show();
 
                     if (playlist.thumbnailUrl.equals(PlaylistEntity.DEFAULT_THUMBNAIL)) {
                         playlistDisposables.add(manager
-                                .changePlaylistThumbnail(playlist.uid, streams.get(0).getUid(),
+                                .changePlaylistThumbnail(playlist.getUid(), streams.get(0).getUid(),
                                         false)
                                 .observeOn(AndroidSchedulers.mainThread())
                                 .subscribe(ignore -> successToast.show()));

app/src/main/java/org/schabi/newpipe/local/feed/notifications/NotificationWorker.kt

@@ -137,7 +137,7 @@ class NotificationWorker(
                 .enqueueUniquePeriodicWork(
                     WORK_TAG,
                     if (force) {
-                        ExistingPeriodicWorkPolicy.REPLACE
+                        ExistingPeriodicWorkPolicy.CANCEL_AND_REENQUEUE
                     } else {
                         ExistingPeriodicWorkPolicy.KEEP
                     },

app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt

@@ -26,7 +26,7 @@ object FeedEventManager {
     }
 
     sealed class Event {
-        object IdleEvent : Event()
+        data object IdleEvent : Event()
         data class ProgressEvent(val currentProgress: Int = -1, val maxProgress: Int = -1, @StringRes val progressMessage: Int = 0) : Event() {
             constructor(@StringRes progressMessage: Int) : this(-1, -1, progressMessage)
         }

app/src/main/java/org/schabi/newpipe/local/feed/service/FeedUpdateInfo.kt

@@ -18,7 +18,7 @@ data class FeedUpdateInfo(
     @NotificationMode
     val notificationMode: Int,
     val name: String,
-    val avatarUrl: String,
+    val avatarUrl: String?,
     val url: String,
     val serviceId: Int,
     // description and subscriberCount are null if the constructor info is from the fast feed method

app/src/main/java/org/schabi/newpipe/local/holder/LocalBookmarkPlaylistItemHolder.java

@@ -0,0 +1,54 @@
+package org.schabi.newpipe.local.holder;
+
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.database.LocalItem;
+import org.schabi.newpipe.database.playlist.PlaylistMetadataEntry;
+import org.schabi.newpipe.local.LocalItemBuilder;
+import org.schabi.newpipe.local.history.HistoryRecordManager;
+
+import java.time.format.DateTimeFormatter;
+
+public class LocalBookmarkPlaylistItemHolder extends LocalPlaylistItemHolder {
+    private final View itemHandleView;
+
+    public LocalBookmarkPlaylistItemHolder(final LocalItemBuilder infoItemBuilder,
+                                           final ViewGroup parent) {
+        this(infoItemBuilder, R.layout.list_playlist_bookmark_item, parent);
+    }
+
+    LocalBookmarkPlaylistItemHolder(final LocalItemBuilder infoItemBuilder, final int layoutId,
+                                    final ViewGroup parent) {
+        super(infoItemBuilder, layoutId, parent);
+        itemHandleView = itemView.findViewById(R.id.itemHandle);
+    }
+
+    @Override
+    public void updateFromItem(final LocalItem localItem,
+                               final HistoryRecordManager historyRecordManager,
+                               final DateTimeFormatter dateTimeFormatter) {
+        if (!(localItem instanceof PlaylistMetadataEntry)) {
+            return;
+        }
+        final PlaylistMetadataEntry item = (PlaylistMetadataEntry) localItem;
+
+        itemHandleView.setOnTouchListener(getOnTouchListener(item));
+
+        super.updateFromItem(localItem, historyRecordManager, dateTimeFormatter);
+    }
+
+    private View.OnTouchListener getOnTouchListener(final PlaylistMetadataEntry item) {
+        return (view, motionEvent) -> {
+            view.performClick();
+            if (itemBuilder != null && itemBuilder.getOnItemSelectedListener() != null
+                    && motionEvent.getActionMasked() == MotionEvent.ACTION_DOWN) {
+                itemBuilder.getOnItemSelectedListener().drag(item,
+                        LocalBookmarkPlaylistItemHolder.this);
+            }
+            return false;
+        };
+    }
+}

app/src/main/java/org/schabi/newpipe/local/holder/RemoteBookmarkPlaylistItemHolder.java

@@ -0,0 +1,54 @@
+package org.schabi.newpipe.local.holder;
+
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.database.LocalItem;
+import org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity;
+import org.schabi.newpipe.local.LocalItemBuilder;
+import org.schabi.newpipe.local.history.HistoryRecordManager;
+
+import java.time.format.DateTimeFormatter;
+
+public class RemoteBookmarkPlaylistItemHolder extends RemotePlaylistItemHolder {
+    private final View itemHandleView;
+
+    public RemoteBookmarkPlaylistItemHolder(final LocalItemBuilder infoItemBuilder,
+                                            final ViewGroup parent) {
+        this(infoItemBuilder, R.layout.list_playlist_bookmark_item, parent);
+    }
+
+    RemoteBookmarkPlaylistItemHolder(final LocalItemBuilder infoItemBuilder, final int layoutId,
+                                     final ViewGroup parent) {
+        super(infoItemBuilder, layoutId, parent);
+        itemHandleView = itemView.findViewById(R.id.itemHandle);
+    }
+
+    @Override
+    public void updateFromItem(final LocalItem localItem,
+                               final HistoryRecordManager historyRecordManager,
+                               final DateTimeFormatter dateTimeFormatter) {
+        if (!(localItem instanceof PlaylistRemoteEntity)) {
+            return;
+        }
+        final PlaylistRemoteEntity item = (PlaylistRemoteEntity) localItem;
+
+        itemHandleView.setOnTouchListener(getOnTouchListener(item));
+
+        super.updateFromItem(localItem, historyRecordManager, dateTimeFormatter);
+    }
+
+    private View.OnTouchListener getOnTouchListener(final PlaylistRemoteEntity item) {
+        return (view, motionEvent) -> {
+            view.performClick();
+            if (itemBuilder != null && itemBuilder.getOnItemSelectedListener() != null
+                    && motionEvent.getActionMasked() == MotionEvent.ACTION_DOWN) {
+                itemBuilder.getOnItemSelectedListener().drag(item,
+                        RemoteBookmarkPlaylistItemHolder.this);
+            }
+            return false;
+        };
+    }
+}

app/src/main/java/org/schabi/newpipe/local/holder/RemotePlaylistItemHolder.java

@@ -14,6 +14,7 @@ import org.schabi.newpipe.util.ServiceHelper;
 import java.time.format.DateTimeFormatter;
 
 public class RemotePlaylistItemHolder extends PlaylistItemHolder {
+
     public RemotePlaylistItemHolder(final LocalItemBuilder infoItemBuilder,
                                     final ViewGroup parent) {
         super(infoItemBuilder, parent);

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java

@@ -49,6 +49,8 @@ import org.schabi.newpipe.local.BaseLocalListFragment;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
+import org.schabi.newpipe.util.debounce.DebounceSavable;
+import org.schabi.newpipe.util.debounce.DebounceSaver;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.OnClickGesture;
@@ -58,7 +60,6 @@ import org.schabi.newpipe.util.external_communication.ShareUtils;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.stream.Collectors;
 
@@ -68,12 +69,10 @@ import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import io.reactivex.rxjava3.disposables.Disposable;
 import io.reactivex.rxjava3.schedulers.Schedulers;
-import io.reactivex.rxjava3.subjects.PublishSubject;
 
 public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistStreamEntry>, Void>
-        implements PlaylistControlViewHolder {
-    /** Save the list 10 seconds after the last change occurred. */
-    private static final long SAVE_DEBOUNCE_MILLIS = 10000;
+        implements PlaylistControlViewHolder, DebounceSavable {
+
     private static final int MINIMUM_INITIAL_DRAG_VELOCITY = 12;
     @State
     protected Long playlistId;
@@ -90,13 +89,12 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     private LocalPlaylistManager playlistManager;
     private Subscription databaseSubscription;
 
-    private PublishSubject<Long> debouncedSaveSignal;
     private CompositeDisposable disposables;
 
     /** Whether the playlist has been fully loaded from db. */
     private AtomicBoolean isLoadingComplete;
-    /** Whether the playlist has been modified (e.g. items reordered or deleted) */
-    private AtomicBoolean isModified;
+    /** Used to debounce saving playlist edits to disk. */
+    private DebounceSaver debounceSaver;
     /** Flag to prevent simultaneous rewrites of the playlist. */
     private boolean isRewritingPlaylist = false;
 
@@ -121,12 +119,11 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     public void onCreate(final Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         playlistManager = new LocalPlaylistManager(NewPipeDatabase.getInstance(requireContext()));
-        debouncedSaveSignal = PublishSubject.create();
 
         disposables = new CompositeDisposable();
 
         isLoadingComplete = new AtomicBoolean();
-        isModified = new AtomicBoolean();
+        debounceSaver = new DebounceSaver(this);
     }
 
     @Override
@@ -166,17 +163,6 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         return headerBinding;
     }
 
-    /**
-     * <p>Commit changes immediately if the playlist has been modified.</p>
-     *  Delete operations and other modifications will be committed to ensure that the database
-     *  is up to date, e.g. when the user adds the just deleted stream from another fragment.
-     */
-    public void commitChanges() {
-        if (isModified != null && isModified.get()) {
-            saveImmediate();
-        }
-    }
-
     @Override
     protected void initListeners() {
         super.initListeners();
@@ -243,10 +229,13 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         if (disposables != null) {
             disposables.clear();
         }
-        disposables.add(getDebouncedSaver());
+
+        if (debounceSaver != null) {
+            disposables.add(debounceSaver.getDebouncedSaver());
+            debounceSaver.setNoChangesToSave();
+        }
 
         isLoadingComplete.set(false);
-        isModified.set(false);
 
         playlistManager.getPlaylistStreams(playlistId)
                 .onBackpressureLatest()
@@ -304,8 +293,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
     @Override
     public void onDestroy() {
         super.onDestroy();
-        if (debouncedSaveSignal != null) {
-            debouncedSaveSignal.onComplete();
+        if (debounceSaver != null) {
+            debounceSaver.getDebouncedSaveSignal().onComplete();
         }
         if (disposables != null) {
             disposables.dispose();
@@ -314,12 +303,11 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
             tabsPagerAdapter.getLocalPlaylistFragments().remove(this);
         }
 
-        debouncedSaveSignal = null;
+        debounceSaver = null;
         playlistManager = null;
         disposables = null;
 
         isLoadingComplete = null;
-        isModified = null;
     }
 
     ///////////////////////////////////////////////////////////////////////////
@@ -343,7 +331,7 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
             @Override
             public void onNext(final List<PlaylistStreamEntry> streams) {
                 // Skip handling the result after it has been modified
-                if (isModified == null || !isModified.get()) {
+                if (debounceSaver == null || !debounceSaver.getIsModified()) {
                     handleResult(streams);
                     isLoadingComplete.set(true);
                 }
@@ -495,14 +483,14 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
 
                     itemListAdapter.clearStreamItemList();
                     itemListAdapter.addItems(itemsToKeep);
-                    saveChanges();
+                    debounceSaver.setHasChangesToSave();
 
                     if (thumbnailVideoRemoved) {
                         updateThumbnailUrl();
                     }
 
                     final long videoCount = itemListAdapter.getItemsList().size();
-                    setVideoCount(videoCount);
+                    setStreamCountAndOverallDuration(itemListAdapter.getItemsList());
                     if (videoCount == 0) {
                         showEmptyState();
                     }
@@ -532,7 +520,7 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
             itemsList.getLayoutManager().onRestoreInstanceState(itemsListState);
             itemsListState = null;
         }
-        setVideoCount(itemListAdapter.getItemsList().size());
+        setStreamCountAndOverallDuration(itemListAdapter.getItemsList());
 
         PlayButtonHelper.initPlaylistControlClickListener(activity, playlistControlBinding, this);
 
@@ -665,8 +653,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
                 .subscribe(itemsToKeep -> {
                     itemListAdapter.clearStreamItemList();
                     itemListAdapter.addItems(itemsToKeep);
-                    setVideoCount(itemListAdapter.getItemsList().size());
-                    saveChanges();
+                    setStreamCountAndOverallDuration(itemListAdapter.getItemsList());
+                    debounceSaver.setHasChangesToSave();
 
                     hideLoading();
                     isRewritingPlaylist = false;
@@ -684,42 +672,24 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
             updateThumbnailUrl();
         }
 
-        setVideoCount(itemListAdapter.getItemsList().size());
-        saveChanges();
+        setStreamCountAndOverallDuration(itemListAdapter.getItemsList());
+        debounceSaver.setHasChangesToSave();
     }
 
-    private void saveChanges() {
-        if (isModified == null || debouncedSaveSignal == null) {
-            return;
-        }
-
-        isModified.set(true);
-        debouncedSaveSignal.onNext(System.currentTimeMillis());
-    }
-
-    private Disposable getDebouncedSaver() {
-        if (debouncedSaveSignal == null) {
-            return Disposable.empty();
-        }
-
-        return debouncedSaveSignal
-                .debounce(SAVE_DEBOUNCE_MILLIS, TimeUnit.MILLISECONDS)
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(ignored -> saveImmediate(), throwable ->
-                        showError(new ErrorInfo(throwable, UserAction.SOMETHING_ELSE,
-                                "Debounced saver")));
-    }
-
-    private void saveImmediate() {
+    /**
+     * <p>Commit changes immediately if the playlist has been modified.</p>
+     *  Delete operations and other modifications will be committed to ensure that the database
+     *  is up to date, e.g. when the user adds the just deleted stream from another fragment.
+     */
+    @Override
+    public void saveImmediate() {
         if (playlistManager == null || itemListAdapter == null) {
             return;
         }
 
         // List must be loaded and modified in order to save
-        if (isLoadingComplete == null || isModified == null
-                || !isLoadingComplete.get() || !isModified.get()) {
-            Log.w(TAG, "Attempting to save playlist when local playlist "
-                    + "is not loaded or not modified: playlist id=[" + playlistId + "]");
+        if (isLoadingComplete == null || debounceSaver == null
+                || !isLoadingComplete.get() || !debounceSaver.getIsModified()) {
             return;
         }
 
@@ -740,8 +710,8 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(
                         () -> {
-                            if (isModified != null) {
-                                isModified.set(false);
+                            if (debounceSaver != null) {
+                                debounceSaver.setNoChangesToSave();
                             }
                         },
                         throwable -> showError(new ErrorInfo(throwable,
@@ -784,7 +754,7 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
                 final int targetIndex = target.getBindingAdapterPosition();
                 final boolean isSwapped = itemListAdapter.swapItems(sourceIndex, targetIndex);
                 if (isSwapped) {
-                    saveChanges();
+                    debounceSaver.setHasChangesToSave();
                 }
                 return isSwapped;
             }
@@ -855,10 +825,21 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         this.name = !TextUtils.isEmpty(title) ? title : "";
     }
 
-    private void setVideoCount(final long count) {
+    private void setStreamCountAndOverallDuration(final ArrayList<LocalItem> itemsList) {
         if (activity != null && headerBinding != null) {
-            headerBinding.playlistStreamCount.setText(Localization
-                    .localizeStreamCount(activity, count));
+            final long streamCount = itemsList.size();
+            final long playlistOverallDurationSeconds = itemsList.stream()
+                    .filter(PlaylistStreamEntry.class::isInstance)
+                    .map(PlaylistStreamEntry.class::cast)
+                    .map(PlaylistStreamEntry::getStreamEntity)
+                    .mapToLong(StreamEntity::getDuration)
+                    .sum();
+            headerBinding.playlistStreamCount.setText(
+                    Localization.concatenateStrings(
+                            Localization.localizeStreamCount(activity, streamCount),
+                            Localization.getDurationString(playlistOverallDurationSeconds,
+                                                            true, true))
+            );
         }
     }
 

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java

@@ -19,7 +19,6 @@ import java.util.List;
 import io.reactivex.rxjava3.core.Completable;
 import io.reactivex.rxjava3.core.Flowable;
 import io.reactivex.rxjava3.core.Maybe;
-import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class LocalPlaylistManager {
@@ -43,10 +42,13 @@ public class LocalPlaylistManager {
             return Maybe.empty();
         }
 
+        // Save to the database directly.
+        // Make sure the new playlist is always on the top of bookmark.
+        // The index will be reassigned to non-negative number in BookmarkFragment.
         return Maybe.fromCallable(() -> database.runInTransaction(() -> {
                     final List<Long> streamIds = streamTable.upsertAll(streams);
                     final PlaylistEntity newPlaylist = new PlaylistEntity(name, false,
-                            streamIds.get(0));
+                            streamIds.get(0), -1);
 
                     return insertJoinEntities(playlistTable.insert(newPlaylist),
                             streamIds, 0);
@@ -89,8 +91,20 @@ public class LocalPlaylistManager {
         })).subscribeOn(Schedulers.io());
     }
 
-    public Flowable<List<PlaylistMetadataEntry>> getPlaylists() {
-        return playlistStreamTable.getPlaylistMetadata().subscribeOn(Schedulers.io());
+    public Completable updatePlaylists(final List<PlaylistMetadataEntry> updateItems,
+                                       final List<Long> deletedItems) {
+        final List<PlaylistEntity> items = new ArrayList<>(updateItems.size());
+        for (final PlaylistMetadataEntry item : updateItems) {
+            items.add(new PlaylistEntity(item));
+        }
+        return Completable.fromRunnable(() -> database.runInTransaction(() -> {
+            for (final Long uid : deletedItems) {
+                playlistTable.deletePlaylist(uid);
+            }
+            for (final PlaylistEntity item : items) {
+                playlistTable.upsertPlaylist(item);
+            }
+        })).subscribeOn(Schedulers.io());
     }
 
     public Flowable<List<PlaylistStreamEntry>> getDistinctPlaylistStreams(final long playlistId) {
@@ -110,13 +124,12 @@ public class LocalPlaylistManager {
                 .subscribeOn(Schedulers.io());
     }
 
-    public Flowable<List<PlaylistStreamEntry>> getPlaylistStreams(final long playlistId) {
-        return playlistStreamTable.getOrderedStreamsOf(playlistId).subscribeOn(Schedulers.io());
+    public Flowable<List<PlaylistMetadataEntry>> getPlaylists() {
+        return playlistStreamTable.getPlaylistMetadata().subscribeOn(Schedulers.io());
     }
 
-    public Single<Integer> deletePlaylist(final long playlistId) {
-        return Single.fromCallable(() -> playlistTable.deletePlaylist(playlistId))
-                .subscribeOn(Schedulers.io());
+    public Flowable<List<PlaylistStreamEntry>> getPlaylistStreams(final long playlistId) {
+        return playlistStreamTable.getOrderedStreamsOf(playlistId).subscribeOn(Schedulers.io());
     }
 
     public Maybe<Integer> renamePlaylist(final long playlistId, final String name) {

app/src/main/java/org/schabi/newpipe/local/playlist/RemotePlaylistManager.java

@@ -7,20 +7,23 @@ import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
 
 import java.util.List;
 
+import io.reactivex.rxjava3.core.Completable;
 import io.reactivex.rxjava3.core.Flowable;
 import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class RemotePlaylistManager {
 
+    private final AppDatabase database;
     private final PlaylistRemoteDAO playlistRemoteTable;
 
     public RemotePlaylistManager(final AppDatabase db) {
+        database = db;
         playlistRemoteTable = db.playlistRemoteDAO();
     }
 
     public Flowable<List<PlaylistRemoteEntity>> getPlaylists() {
-        return playlistRemoteTable.getAll().subscribeOn(Schedulers.io());
+        return playlistRemoteTable.getPlaylists().subscribeOn(Schedulers.io());
     }
 
     public Flowable<List<PlaylistRemoteEntity>> getPlaylist(final PlaylistInfo info) {
@@ -33,6 +36,18 @@ public class RemotePlaylistManager {
                 .subscribeOn(Schedulers.io());
     }
 
+    public Completable updatePlaylists(final List<PlaylistRemoteEntity> updateItems,
+                                       final List<Long> deletedItems) {
+        return Completable.fromRunnable(() -> database.runInTransaction(() -> {
+            for (final Long uid: deletedItems) {
+                playlistRemoteTable.deletePlaylist(uid);
+            }
+            for (final PlaylistRemoteEntity item: updateItems) {
+                playlistRemoteTable.upsert(item);
+            }
+        })).subscribeOn(Schedulers.io());
+    }
+
     public Single<Long> onBookmark(final PlaylistInfo playlistInfo) {
         return Single.fromCallable(() -> {
             final PlaylistRemoteEntity playlist = new PlaylistRemoteEntity(playlistInfo);

app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt

@@ -100,7 +100,9 @@ class SubscriptionManager(context: Context) {
         val subscriptionEntity = subscriptionTable.getSubscription(info.uid)
 
         subscriptionEntity.name = info.name
-        subscriptionEntity.avatarUrl = info.avatarUrl
+
+        // some services do not provide an avatar URL
+        info.avatarUrl?.let { subscriptionEntity.avatarUrl = it }
 
         // these two fields are null if the feed info was fetched using the fast feed method
         info.description?.let { subscriptionEntity.description = it }

app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt

@@ -55,10 +55,10 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
     private var groupSortOrder: Long = -1
 
     sealed class ScreenState : Serializable {
-        object InitialScreen : ScreenState()
-        object IconPickerScreen : ScreenState()
-        object SubscriptionsPickerScreen : ScreenState()
-        object DeleteScreen : ScreenState()
+        data object InitialScreen : ScreenState()
+        data object IconPickerScreen : ScreenState()
+        data object SubscriptionsPickerScreen : ScreenState()
+        data object DeleteScreen : ScreenState()
     }
 
     @State @JvmField var selectedIcon: FeedGroupIcon? = null
@@ -370,7 +370,7 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
 
     private fun setupIconPicker() {
         val groupAdapter = GroupieAdapter()
-        groupAdapter.addAll(FeedGroupIcon.values().map { PickerIconItem(it) })
+        groupAdapter.addAll(FeedGroupIcon.entries.map { PickerIconItem(it) })
 
         feedGroupCreateBinding.iconSelector.apply {
             layoutManager = GridLayoutManager(requireContext(), 7, RecyclerView.VERTICAL, false)

app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt

@@ -110,8 +110,8 @@ class FeedGroupDialogViewModel(
     }
 
     sealed class DialogEvent {
-        object ProcessingEvent : DialogEvent()
-        object SuccessEvent : DialogEvent()
+        data object ProcessingEvent : DialogEvent()
+        data object SuccessEvent : DialogEvent()
     }
 
     data class Filter(val query: String, val showOnlyUngrouped: Boolean)

app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsExportService.java

@@ -25,6 +25,7 @@ import android.content.Intent;
 import android.net.Uri;
 import android.util.Log;
 
+import androidx.core.content.IntentCompat;
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
 
 import org.reactivestreams.Subscriber;
@@ -65,7 +66,7 @@ public class SubscriptionsExportService extends BaseImportExportService {
             return START_NOT_STICKY;
         }
 
-        final Uri path = intent.getParcelableExtra(KEY_FILE_PATH);
+        final Uri path = IntentCompat.getParcelableExtra(intent, KEY_FILE_PATH, Uri.class);
         if (path == null) {
             stopAndReportError(new IllegalStateException(
                     "Exporting to a file, but the path is null"),

app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsImportService.java

@@ -30,6 +30,7 @@ import android.util.Pair;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.content.IntentCompat;
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
 
 import org.reactivestreams.Subscriber;
@@ -108,7 +109,7 @@ public class SubscriptionsImportService extends BaseImportExportService {
         if (currentMode == CHANNEL_URL_MODE) {
             channelUrl = intent.getStringExtra(KEY_VALUE);
         } else {
-            final Uri uri = intent.getParcelableExtra(KEY_VALUE);
+            final Uri uri = IntentCompat.getParcelableExtra(intent, KEY_VALUE, Uri.class);
             if (uri == null) {
                 stopAndReportError(new IllegalStateException(
                         "Importing from input stream, but file path is null"),

app/src/main/java/org/schabi/newpipe/player/gesture/MainPlayerGestureListener.kt

@@ -160,13 +160,12 @@ class MainPlayerGestureListener(
     }
 
     override fun onScroll(
-        initialEvent: MotionEvent,
+        initialEvent: MotionEvent?,
         movingEvent: MotionEvent,
         distanceX: Float,
         distanceY: Float
     ): Boolean {
-
-        if (!playerUi.isFullscreen) {
+        if (initialEvent == null || !playerUi.isFullscreen) {
             return false
         }
 

app/src/main/java/org/schabi/newpipe/player/gesture/PopupPlayerGestureListener.kt

@@ -167,7 +167,7 @@ class PopupPlayerGestureListener(
     }
 
     override fun onFling(
-        e1: MotionEvent,
+        e1: MotionEvent?,
         e2: MotionEvent,
         velocityX: Float,
         velocityY: Float
@@ -218,11 +218,14 @@ class PopupPlayerGestureListener(
     }
 
     override fun onScroll(
-        initialEvent: MotionEvent,
+        initialEvent: MotionEvent?,
         movingEvent: MotionEvent,
         distanceX: Float,
         distanceY: Float
     ): Boolean {
+        if (initialEvent == null) {
+            return false
+        }
 
         if (isResizing) {
             return super.onScroll(initialEvent, movingEvent, distanceX, distanceY)

app/src/main/java/org/schabi/newpipe/player/mediasession/MediaSessionPlayerUi.java

@@ -1,10 +1,12 @@
 package org.schabi.newpipe.player.mediasession;
 
 import static org.schabi.newpipe.MainActivity.DEBUG;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_RECREATE_NOTIFICATION;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.graphics.Bitmap;
+import android.os.Build;
 import android.support.v4.media.MediaMetadataCompat;
 import android.support.v4.media.session.MediaSessionCompat;
 import android.util.Log;
@@ -14,15 +16,23 @@ import androidx.annotation.Nullable;
 import androidx.media.session.MediaButtonReceiver;
 
 import com.google.android.exoplayer2.ForwardingPlayer;
+import com.google.android.exoplayer2.Player.RepeatMode;
 import com.google.android.exoplayer2.ext.mediasession.MediaSessionConnector;
 
 import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.player.Player;
+import org.schabi.newpipe.player.notification.NotificationActionData;
+import org.schabi.newpipe.player.notification.NotificationConstants;
 import org.schabi.newpipe.player.ui.PlayerUi;
 import org.schabi.newpipe.player.ui.VideoPlayerUi;
 import org.schabi.newpipe.util.StreamTypeUtil;
 
+import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
 
 public class MediaSessionPlayerUi extends PlayerUi
         implements SharedPreferences.OnSharedPreferenceChangeListener {
@@ -34,6 +44,10 @@ public class MediaSessionPlayerUi extends PlayerUi
     private final String ignoreHardwareMediaButtonsKey;
     private boolean shouldIgnoreHardwareMediaButtons = false;
 
+    // used to check whether any notification action changed, before sending costly updates
+    private List<NotificationActionData> prevNotificationActions = List.of();
+
+
     public MediaSessionPlayerUi(@NonNull final Player player) {
         super(player);
         ignoreHardwareMediaButtonsKey =
@@ -63,6 +77,10 @@ public class MediaSessionPlayerUi extends PlayerUi
 
         sessionConnector.setMetadataDeduplicationEnabled(true);
         sessionConnector.setMediaMetadataProvider(exoPlayer -> buildMediaMetadata());
+
+        // force updating media session actions by resetting the previous ones
+        prevNotificationActions = List.of();
+        updateMediaSessionActions();
     }
 
     @Override
@@ -80,6 +98,7 @@ public class MediaSessionPlayerUi extends PlayerUi
             mediaSession.release();
             mediaSession = null;
         }
+        prevNotificationActions = List.of();
     }
 
     @Override
@@ -163,4 +182,109 @@ public class MediaSessionPlayerUi extends PlayerUi
 
         return builder.build();
     }
+
+
+    private void updateMediaSessionActions() {
+        // On Android 13+ (or Android T or API 33+) the actions in the player notification can't be
+        // controlled directly anymore, but are instead derived from custom media session actions.
+        // However the system allows customizing only two of these actions, since the other three
+        // are fixed to play-pause-buffering, previous, next.
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
+            // Although setting media session actions on older android versions doesn't seem to
+            // cause any trouble, it also doesn't seem to do anything, so we don't do anything to
+            // save battery. Check out NotificationUtil.updateActions() to see what happens on
+            // older android versions.
+            return;
+        }
+
+        // only use the fourth and fifth actions (the settings page also shows only the last 2 on
+        // Android 13+)
+        final List<NotificationActionData> newNotificationActions = IntStream.of(3, 4)
+                .map(i -> player.getPrefs().getInt(
+                        player.getContext().getString(NotificationConstants.SLOT_PREF_KEYS[i]),
+                        NotificationConstants.SLOT_DEFAULTS[i]))
+                .mapToObj(action -> NotificationActionData
+                        .fromNotificationActionEnum(player, action))
+                .filter(Objects::nonNull)
+                .collect(Collectors.toList());
+
+        // avoid costly notification actions update, if nothing changed from last time
+        if (!newNotificationActions.equals(prevNotificationActions)) {
+            prevNotificationActions = newNotificationActions;
+            sessionConnector.setCustomActionProviders(
+                    newNotificationActions.stream()
+                            .map(data -> new SessionConnectorActionProvider(data, context))
+                            .toArray(SessionConnectorActionProvider[]::new));
+        }
+    }
+
+    @Override
+    public void onBlocked() {
+        super.onBlocked();
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onPlaying() {
+        super.onPlaying();
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onBuffering() {
+        super.onBuffering();
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onPaused() {
+        super.onPaused();
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onPausedSeek() {
+        super.onPausedSeek();
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onCompleted() {
+        super.onCompleted();
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onRepeatModeChanged(@RepeatMode final int repeatMode) {
+        super.onRepeatModeChanged(repeatMode);
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onShuffleModeEnabledChanged(final boolean shuffleModeEnabled) {
+        super.onShuffleModeEnabledChanged(shuffleModeEnabled);
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onBroadcastReceived(final Intent intent) {
+        super.onBroadcastReceived(intent);
+        if (ACTION_RECREATE_NOTIFICATION.equals(intent.getAction())) {
+            // the notification actions changed
+            updateMediaSessionActions();
+        }
+    }
+
+    @Override
+    public void onMetadataChanged(@NonNull final StreamInfo info) {
+        super.onMetadataChanged(info);
+        updateMediaSessionActions();
+    }
+
+    @Override
+    public void onPlayQueueEdited() {
+        super.onPlayQueueEdited();
+        updateMediaSessionActions();
+    }
 }

app/src/main/java/org/schabi/newpipe/player/mediasession/SessionConnectorActionProvider.java

@@ -0,0 +1,47 @@
+package org.schabi.newpipe.player.mediasession;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v4.media.session.PlaybackStateCompat;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import com.google.android.exoplayer2.Player;
+import com.google.android.exoplayer2.ext.mediasession.MediaSessionConnector;
+
+import org.schabi.newpipe.player.notification.NotificationActionData;
+
+import java.lang.ref.WeakReference;
+
+public class SessionConnectorActionProvider implements MediaSessionConnector.CustomActionProvider {
+
+    private final NotificationActionData data;
+    @NonNull
+    private final WeakReference<Context> context;
+
+    public SessionConnectorActionProvider(final NotificationActionData notificationActionData,
+                                          @NonNull final Context context) {
+        this.data = notificationActionData;
+        this.context = new WeakReference<>(context);
+    }
+
+    @Override
+    public void onCustomAction(@NonNull final Player player,
+                               @NonNull final String action,
+                               @Nullable final Bundle extras) {
+        final Context actualContext = context.get();
+        if (actualContext != null) {
+            actualContext.sendBroadcast(new Intent(action));
+        }
+    }
+
+    @Nullable
+    @Override
+    public PlaybackStateCompat.CustomAction getCustomAction(@NonNull final Player player) {
+        return new PlaybackStateCompat.CustomAction.Builder(
+                data.action(), data.name(), data.icon()
+        ).build();
+    }
+}

app/src/main/java/org/schabi/newpipe/player/notification/NotificationActionData.java

@@ -0,0 +1,187 @@
+package org.schabi.newpipe.player.notification;
+
+import static com.google.android.exoplayer2.Player.REPEAT_MODE_ALL;
+import static com.google.android.exoplayer2.Player.REPEAT_MODE_ONE;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_CLOSE;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_FAST_FORWARD;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_FAST_REWIND;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_PLAY_NEXT;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_PLAY_PAUSE;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_PLAY_PREVIOUS;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_REPEAT;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_SHUFFLE;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+
+import androidx.annotation.DrawableRes;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.player.Player;
+
+import java.util.Objects;
+
+public final class NotificationActionData {
+
+    @NonNull
+    private final String action;
+    @NonNull
+    private final String name;
+    @DrawableRes
+    private final int icon;
+
+
+    public NotificationActionData(@NonNull final String action, @NonNull final String name,
+                                  @DrawableRes final int icon) {
+        this.action = action;
+        this.name = name;
+        this.icon = icon;
+    }
+
+    @NonNull
+    public String action() {
+        return action;
+    }
+
+    @NonNull
+    public String name() {
+        return name;
+    }
+
+    @DrawableRes
+    public int icon() {
+        return icon;
+    }
+
+
+    @SuppressLint("PrivateResource") // we currently use Exoplayer's internal strings and icons
+    @Nullable
+    public static NotificationActionData fromNotificationActionEnum(
+            @NonNull final Player player,
+            @NotificationConstants.Action final int selectedAction
+    ) {
+
+        final int baseActionIcon = NotificationConstants.ACTION_ICONS[selectedAction];
+        final Context ctx = player.getContext();
+
+        switch (selectedAction) {
+            case NotificationConstants.PREVIOUS:
+                return new NotificationActionData(ACTION_PLAY_PREVIOUS,
+                        ctx.getString(R.string.exo_controls_previous_description), baseActionIcon);
+
+            case NotificationConstants.NEXT:
+                return new NotificationActionData(ACTION_PLAY_NEXT,
+                        ctx.getString(R.string.exo_controls_next_description), baseActionIcon);
+
+            case NotificationConstants.REWIND:
+                return new NotificationActionData(ACTION_FAST_REWIND,
+                        ctx.getString(R.string.exo_controls_rewind_description), baseActionIcon);
+
+            case NotificationConstants.FORWARD:
+                return new NotificationActionData(ACTION_FAST_FORWARD,
+                        ctx.getString(R.string.exo_controls_fastforward_description),
+                        baseActionIcon);
+
+            case NotificationConstants.SMART_REWIND_PREVIOUS:
+                if (player.getPlayQueue() != null && player.getPlayQueue().size() > 1) {
+                    return new NotificationActionData(ACTION_PLAY_PREVIOUS,
+                            ctx.getString(R.string.exo_controls_previous_description),
+                            R.drawable.exo_notification_previous);
+                } else {
+                    return new NotificationActionData(ACTION_FAST_REWIND,
+                            ctx.getString(R.string.exo_controls_rewind_description),
+                            R.drawable.exo_controls_rewind);
+                }
+
+            case NotificationConstants.SMART_FORWARD_NEXT:
+                if (player.getPlayQueue() != null && player.getPlayQueue().size() > 1) {
+                    return new NotificationActionData(ACTION_PLAY_NEXT,
+                            ctx.getString(R.string.exo_controls_next_description),
+                            R.drawable.exo_notification_next);
+                } else {
+                    return new NotificationActionData(ACTION_FAST_FORWARD,
+                            ctx.getString(R.string.exo_controls_fastforward_description),
+                            R.drawable.exo_controls_fastforward);
+                }
+
+            case NotificationConstants.PLAY_PAUSE_BUFFERING:
+                if (player.getCurrentState() == Player.STATE_PREFLIGHT
+                        || player.getCurrentState() == Player.STATE_BLOCKED
+                        || player.getCurrentState() == Player.STATE_BUFFERING) {
+                    return new NotificationActionData(ACTION_PLAY_PAUSE,
+                            ctx.getString(R.string.notification_action_buffering),
+                            R.drawable.ic_hourglass_top);
+                }
+
+                // fallthrough
+            case NotificationConstants.PLAY_PAUSE:
+                if (player.getCurrentState() == Player.STATE_COMPLETED) {
+                    return new NotificationActionData(ACTION_PLAY_PAUSE,
+                            ctx.getString(R.string.exo_controls_pause_description),
+                            R.drawable.ic_replay);
+                } else if (player.isPlaying()
+                        || player.getCurrentState() == Player.STATE_PREFLIGHT
+                        || player.getCurrentState() == Player.STATE_BLOCKED
+                        || player.getCurrentState() == Player.STATE_BUFFERING) {
+                    return new NotificationActionData(ACTION_PLAY_PAUSE,
+                            ctx.getString(R.string.exo_controls_pause_description),
+                            R.drawable.exo_notification_pause);
+                } else {
+                    return new NotificationActionData(ACTION_PLAY_PAUSE,
+                            ctx.getString(R.string.exo_controls_play_description),
+                            R.drawable.exo_notification_play);
+                }
+
+            case NotificationConstants.REPEAT:
+                if (player.getRepeatMode() == REPEAT_MODE_ALL) {
+                    return new NotificationActionData(ACTION_REPEAT,
+                            ctx.getString(R.string.exo_controls_repeat_all_description),
+                            R.drawable.exo_media_action_repeat_all);
+                } else if (player.getRepeatMode() == REPEAT_MODE_ONE) {
+                    return new NotificationActionData(ACTION_REPEAT,
+                            ctx.getString(R.string.exo_controls_repeat_one_description),
+                            R.drawable.exo_media_action_repeat_one);
+                } else /* player.getRepeatMode() == REPEAT_MODE_OFF */ {
+                    return new NotificationActionData(ACTION_REPEAT,
+                            ctx.getString(R.string.exo_controls_repeat_off_description),
+                            R.drawable.exo_media_action_repeat_off);
+                }
+
+            case NotificationConstants.SHUFFLE:
+                if (player.getPlayQueue() != null && player.getPlayQueue().isShuffled()) {
+                    return new NotificationActionData(ACTION_SHUFFLE,
+                            ctx.getString(R.string.exo_controls_shuffle_on_description),
+                            R.drawable.exo_controls_shuffle_on);
+                } else {
+                    return new NotificationActionData(ACTION_SHUFFLE,
+                            ctx.getString(R.string.exo_controls_shuffle_off_description),
+                            R.drawable.exo_controls_shuffle_off);
+                }
+
+            case NotificationConstants.CLOSE:
+                return new NotificationActionData(ACTION_CLOSE, ctx.getString(R.string.close),
+                        R.drawable.ic_close);
+
+            case NotificationConstants.NOTHING:
+            default:
+                // do nothing
+                return null;
+        }
+    }
+
+
+    @Override
+    public boolean equals(@Nullable final Object obj) {
+        return (obj instanceof NotificationActionData other)
+                && this.action.equals(other.action)
+                && this.name.equals(other.name)
+                && this.icon == other.icon;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(action, name, icon);
+    }
+}

app/src/main/java/org/schabi/newpipe/player/notification/NotificationConstants.java

@@ -13,7 +13,7 @@ import org.schabi.newpipe.util.Localization;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
-import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import java.util.SortedSet;
 import java.util.TreeSet;
@@ -65,10 +65,16 @@ public final class NotificationConstants {
     public static final int CLOSE = 11;
 
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({NOTHING, PREVIOUS, NEXT, REWIND, FORWARD, SMART_REWIND_PREVIOUS, SMART_FORWARD_NEXT,
-            PLAY_PAUSE, PLAY_PAUSE_BUFFERING, REPEAT, SHUFFLE, CLOSE})
+    @IntDef({NOTHING, PREVIOUS, NEXT, REWIND, FORWARD,
+            SMART_REWIND_PREVIOUS, SMART_FORWARD_NEXT, PLAY_PAUSE, PLAY_PAUSE_BUFFERING, REPEAT,
+            SHUFFLE, CLOSE})
     public @interface Action { }
 
+    @Action
+    public static final int[] ALL_ACTIONS = {NOTHING, PREVIOUS, NEXT, REWIND, FORWARD,
+            SMART_REWIND_PREVIOUS, SMART_FORWARD_NEXT, PLAY_PAUSE, PLAY_PAUSE_BUFFERING, REPEAT,
+            SHUFFLE, CLOSE};
+
     @DrawableRes
     public static final int[] ACTION_ICONS = {
             0,
@@ -95,16 +101,6 @@ public final class NotificationConstants {
             CLOSE,
     };
 
-    @Action
-    public static final int[][] SLOT_ALLOWED_ACTIONS = {
-            new int[] {PREVIOUS, REWIND, SMART_REWIND_PREVIOUS},
-            new int[] {REWIND, PLAY_PAUSE, PLAY_PAUSE_BUFFERING},
-            new int[] {NEXT, FORWARD, SMART_FORWARD_NEXT, PLAY_PAUSE, PLAY_PAUSE_BUFFERING},
-            new int[] {NOTHING, PREVIOUS, NEXT, REWIND, FORWARD, SMART_REWIND_PREVIOUS,
-                    SMART_FORWARD_NEXT, REPEAT, SHUFFLE, CLOSE},
-            new int[] {NOTHING, NEXT, FORWARD, SMART_FORWARD_NEXT, REPEAT, SHUFFLE, CLOSE},
-    };
-
     public static final int[] SLOT_PREF_KEYS = {
             R.string.notification_slot_0_key,
             R.string.notification_slot_1_key,
@@ -165,14 +161,11 @@ public final class NotificationConstants {
     /**
      * @param context the context to use
      * @param sharedPreferences the shared preferences to query values from
-     * @param slotCount remove indices >= than this value (set to {@code 5} to do nothing, or make
-     *                  it lower if there are slots with empty actions)
      * @return a sorted list of the indices of the slots to use as compact slots
      */
-    public static List<Integer> getCompactSlotsFromPreferences(
+    public static Collection<Integer> getCompactSlotsFromPreferences(
             @NonNull final Context context,
-            final SharedPreferences sharedPreferences,
-            final int slotCount) {
+            final SharedPreferences sharedPreferences) {
         final SortedSet<Integer> compactSlots = new TreeSet<>();
         for (int i = 0; i < 3; i++) {
             final int compactSlot = sharedPreferences.getInt(
@@ -180,14 +173,14 @@ public final class NotificationConstants {
 
             if (compactSlot == Integer.MAX_VALUE) {
                 // settings not yet populated, return default values
-                return new ArrayList<>(SLOT_COMPACT_DEFAULTS);
+                return SLOT_COMPACT_DEFAULTS;
             }
 
-            // a negative value (-1) is set when the user does not want a particular compact slot
-            if (compactSlot >= 0 && compactSlot < slotCount) {
+            if (compactSlot >= 0) {
+                // compact slot is < 0 if there are less than 3 checked checkboxes
                 compactSlots.add(compactSlot);
             }
         }
-        return new ArrayList<>(compactSlots);
+        return compactSlots;
     }
 }

app/src/main/java/org/schabi/newpipe/player/notification/NotificationUtil.java

@@ -1,16 +1,19 @@
 package org.schabi.newpipe.player.notification;
 
+import static android.app.PendingIntent.FLAG_UPDATE_CURRENT;
+import static androidx.media.app.NotificationCompat.MediaStyle;
+import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_CLOSE;
+
 import android.annotation.SuppressLint;
+import android.app.PendingIntent;
 import android.content.Intent;
 import android.content.pm.ServiceInfo;
 import android.graphics.Bitmap;
 import android.os.Build;
 import android.util.Log;
 
-import androidx.annotation.DrawableRes;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.annotation.StringRes;
 import androidx.core.app.NotificationCompat;
 import androidx.core.app.NotificationManagerCompat;
 import androidx.core.app.PendingIntentCompat;
@@ -23,23 +26,12 @@ import org.schabi.newpipe.player.Player;
 import org.schabi.newpipe.player.mediasession.MediaSessionPlayerUi;
 import org.schabi.newpipe.util.NavigationHelper;
 
+import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
 
-import static android.app.PendingIntent.FLAG_UPDATE_CURRENT;
-import static androidx.media.app.NotificationCompat.MediaStyle;
-import static com.google.android.exoplayer2.Player.REPEAT_MODE_ALL;
-import static com.google.android.exoplayer2.Player.REPEAT_MODE_ONE;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_CLOSE;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_FAST_FORWARD;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_FAST_REWIND;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_PLAY_NEXT;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_PLAY_PAUSE;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_PLAY_PREVIOUS;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_REPEAT;
-import static org.schabi.newpipe.player.notification.NotificationConstants.ACTION_SHUFFLE;
-
 /**
  * This is a utility class for player notifications.
  */
@@ -100,29 +92,21 @@ public final class NotificationUtil {
         final NotificationCompat.Builder builder =
                 new NotificationCompat.Builder(player.getContext(),
                 player.getContext().getString(R.string.notification_channel_id));
+        final MediaStyle mediaStyle = new MediaStyle();
 
-        initializeNotificationSlots();
-
-        // count the number of real slots, to make sure compact slots indices are not out of bound
-        int nonNothingSlotCount = 5;
-        if (notificationSlots[3] == NotificationConstants.NOTHING) {
-            --nonNothingSlotCount;
+        // setup media style (compact notification slots and media session)
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
+            // notification actions are ignored on Android 13+, and are replaced by code in
+            // MediaSessionPlayerUi
+            final int[] compactSlots = initializeNotificationSlots();
+            mediaStyle.setShowActionsInCompactView(compactSlots);
         }
-        if (notificationSlots[4] == NotificationConstants.NOTHING) {
-            --nonNothingSlotCount;
-        }
-
-        // build the compact slot indices array (need code to convert from Integer... because Java)
-        final List<Integer> compactSlotList = NotificationConstants.getCompactSlotsFromPreferences(
-                player.getContext(), player.getPrefs(), nonNothingSlotCount);
-        final int[] compactSlots = compactSlotList.stream().mapToInt(Integer::intValue).toArray();
-
-        final MediaStyle mediaStyle = new MediaStyle().setShowActionsInCompactView(compactSlots);
         player.UIs()
                 .get(MediaSessionPlayerUi.class)
                 .flatMap(MediaSessionPlayerUi::getSessionToken)
                 .ifPresent(mediaStyle::setMediaSession);
 
+        // setup notification builder
         builder.setStyle(mediaStyle)
                 .setPriority(NotificationCompat.PRIORITY_HIGH)
                 .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
@@ -157,7 +141,11 @@ public final class NotificationUtil {
         notificationBuilder.setContentText(player.getUploaderName());
         notificationBuilder.setTicker(player.getVideoTitle());
 
-        updateActions(notificationBuilder);
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU) {
+            // notification actions are ignored on Android 13+, and are replaced by code in
+            // MediaSessionPlayerUi
+            updateActions(notificationBuilder);
+        }
     }
 
 
@@ -209,12 +197,35 @@ public final class NotificationUtil {
     // ACTIONS
     /////////////////////////////////////////////////////
 
-    private void initializeNotificationSlots() {
+    /**
+     * The compact slots array from settings contains indices from 0 to 4, each referring to one of
+     * the five actions configurable by the user. However, if the user sets an action to "Nothing",
+     * then all of the actions coming after will have a "settings index" different than the index
+     * of the corresponding action when sent to the system.
+     *
+     * @return the indices of compact slots referred to the list of non-nothing actions that will be
+     *         sent to the system
+     */
+    private int[] initializeNotificationSlots() {
+        final Collection<Integer> settingsCompactSlots = NotificationConstants
+                .getCompactSlotsFromPreferences(player.getContext(), player.getPrefs());
+        final List<Integer> adjustedCompactSlots = new ArrayList<>();
+
+        int nonNothingIndex = 0;
         for (int i = 0; i < 5; ++i) {
             notificationSlots[i] = player.getPrefs().getInt(
                     player.getContext().getString(NotificationConstants.SLOT_PREF_KEYS[i]),
                     NotificationConstants.SLOT_DEFAULTS[i]);
+
+            if (notificationSlots[i] != NotificationConstants.NOTHING) {
+                if (settingsCompactSlots.contains(i)) {
+                    adjustedCompactSlots.add(nonNothingIndex);
+                }
+                nonNothingIndex += 1;
+            }
         }
+
+        return adjustedCompactSlots.stream().mapToInt(Integer::intValue).toArray();
     }
 
     @SuppressLint("RestrictedApi")
@@ -227,115 +238,15 @@ public final class NotificationUtil {
 
     private void addAction(final NotificationCompat.Builder builder,
                            @NotificationConstants.Action final int slot) {
-        final NotificationCompat.Action action = getAction(slot);
-        if (action != null) {
-            builder.addAction(action);
+        @Nullable final NotificationActionData data =
+                NotificationActionData.fromNotificationActionEnum(player, slot);
+        if (data == null) {
+            return;
         }
-    }
 
-    @Nullable
-    private NotificationCompat.Action getAction(
-            @NotificationConstants.Action final int selectedAction) {
-        final int baseActionIcon = NotificationConstants.ACTION_ICONS[selectedAction];
-        switch (selectedAction) {
-            case NotificationConstants.PREVIOUS:
-                return getAction(baseActionIcon,
-                        R.string.exo_controls_previous_description, ACTION_PLAY_PREVIOUS);
-
-            case NotificationConstants.NEXT:
-                return getAction(baseActionIcon,
-                        R.string.exo_controls_next_description, ACTION_PLAY_NEXT);
-
-            case NotificationConstants.REWIND:
-                return getAction(baseActionIcon,
-                        R.string.exo_controls_rewind_description, ACTION_FAST_REWIND);
-
-            case NotificationConstants.FORWARD:
-                return getAction(baseActionIcon,
-                        R.string.exo_controls_fastforward_description, ACTION_FAST_FORWARD);
-
-            case NotificationConstants.SMART_REWIND_PREVIOUS:
-                if (player.getPlayQueue() != null && player.getPlayQueue().size() > 1) {
-                    return getAction(R.drawable.exo_notification_previous,
-                            R.string.exo_controls_previous_description, ACTION_PLAY_PREVIOUS);
-                } else {
-                    return getAction(R.drawable.exo_controls_rewind,
-                            R.string.exo_controls_rewind_description, ACTION_FAST_REWIND);
-                }
-
-            case NotificationConstants.SMART_FORWARD_NEXT:
-                if (player.getPlayQueue() != null && player.getPlayQueue().size() > 1) {
-                    return getAction(R.drawable.exo_notification_next,
-                            R.string.exo_controls_next_description, ACTION_PLAY_NEXT);
-                } else {
-                    return getAction(R.drawable.exo_controls_fastforward,
-                            R.string.exo_controls_fastforward_description, ACTION_FAST_FORWARD);
-                }
-
-            case NotificationConstants.PLAY_PAUSE_BUFFERING:
-                if (player.getCurrentState() == Player.STATE_PREFLIGHT
-                        || player.getCurrentState() == Player.STATE_BLOCKED
-                        || player.getCurrentState() == Player.STATE_BUFFERING) {
-                    // null intent -> show hourglass icon that does nothing when clicked
-                    return new NotificationCompat.Action(R.drawable.ic_hourglass_top,
-                            player.getContext().getString(R.string.notification_action_buffering),
-                            null);
-                }
-
-                // fallthrough
-            case NotificationConstants.PLAY_PAUSE:
-                if (player.getCurrentState() == Player.STATE_COMPLETED) {
-                    return getAction(R.drawable.ic_replay,
-                            R.string.exo_controls_pause_description, ACTION_PLAY_PAUSE);
-                } else if (player.isPlaying()
-                        || player.getCurrentState() == Player.STATE_PREFLIGHT
-                        || player.getCurrentState() == Player.STATE_BLOCKED
-                        || player.getCurrentState() == Player.STATE_BUFFERING) {
-                    return getAction(R.drawable.exo_notification_pause,
-                            R.string.exo_controls_pause_description, ACTION_PLAY_PAUSE);
-                } else {
-                    return getAction(R.drawable.exo_notification_play,
-                            R.string.exo_controls_play_description, ACTION_PLAY_PAUSE);
-                }
-
-            case NotificationConstants.REPEAT:
-                if (player.getRepeatMode() == REPEAT_MODE_ALL) {
-                    return getAction(R.drawable.exo_media_action_repeat_all,
-                            R.string.exo_controls_repeat_all_description, ACTION_REPEAT);
-                } else if (player.getRepeatMode() == REPEAT_MODE_ONE) {
-                    return getAction(R.drawable.exo_media_action_repeat_one,
-                            R.string.exo_controls_repeat_one_description, ACTION_REPEAT);
-                } else /* player.getRepeatMode() == REPEAT_MODE_OFF */ {
-                    return getAction(R.drawable.exo_media_action_repeat_off,
-                            R.string.exo_controls_repeat_off_description, ACTION_REPEAT);
-                }
-
-            case NotificationConstants.SHUFFLE:
-                if (player.getPlayQueue() != null && player.getPlayQueue().isShuffled()) {
-                    return getAction(R.drawable.exo_controls_shuffle_on,
-                            R.string.exo_controls_shuffle_on_description, ACTION_SHUFFLE);
-                } else {
-                    return getAction(R.drawable.exo_controls_shuffle_off,
-                            R.string.exo_controls_shuffle_off_description, ACTION_SHUFFLE);
-                }
-
-            case NotificationConstants.CLOSE:
-                return getAction(R.drawable.ic_close,
-                        R.string.close, ACTION_CLOSE);
-
-            case NotificationConstants.NOTHING:
-            default:
-                // do nothing
-                return null;
-        }
-    }
-
-    private NotificationCompat.Action getAction(@DrawableRes final int drawable,
-                                                @StringRes final int title,
-                                                final String intentAction) {
-        return new NotificationCompat.Action(drawable, player.getContext().getString(title),
-                PendingIntentCompat.getBroadcast(player.getContext(), NOTIFICATION_ID,
-                        new Intent(intentAction), FLAG_UPDATE_CURRENT, false));
+        final PendingIntent intent = PendingIntentCompat.getBroadcast(player.getContext(),
+                NOTIFICATION_ID, new Intent(data.action()), FLAG_UPDATE_CURRENT, false);
+        builder.addAction(new NotificationCompat.Action(data.icon(), data.name(), intent));
     }
 
     private Intent getIntentForNotification() {
@@ -364,7 +275,7 @@ public final class NotificationUtil {
         final Bitmap thumbnail = player.getThumbnail();
         if (thumbnail == null || !showThumbnail) {
             // since the builder is reused, make sure the thumbnail is unset if there is not one
-            builder.setLargeIcon(null);
+            builder.setLargeIcon((Bitmap) null);
             return;
         }
 

app/src/main/java/org/schabi/newpipe/settings/BackupRestoreSettingsFragment.java

@@ -0,0 +1,301 @@
+package org.schabi.newpipe.settings;
+
+import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
+import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.net.Uri;
+import android.os.Bundle;
+import android.widget.Toast;
+
+import androidx.activity.result.ActivityResult;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceManager;
+
+import com.grack.nanojson.JsonParserException;
+
+import org.schabi.newpipe.NewPipeDatabase;
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.error.ErrorInfo;
+import org.schabi.newpipe.error.ErrorUtil;
+import org.schabi.newpipe.error.UserAction;
+import org.schabi.newpipe.settings.export.BackupFileLocator;
+import org.schabi.newpipe.settings.export.ImportExportManager;
+import org.schabi.newpipe.streams.io.NoFileManagerSafeGuard;
+import org.schabi.newpipe.streams.io.StoredFileHelper;
+import org.schabi.newpipe.util.NavigationHelper;
+import org.schabi.newpipe.util.ZipHelper;
+
+import java.io.File;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.Objects;
+
+public class BackupRestoreSettingsFragment extends BasePreferenceFragment {
+
+    private static final String ZIP_MIME_TYPE = "application/zip";
+
+    private final SimpleDateFormat exportDateFormat =
+            new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
+    private ImportExportManager manager;
+    private String importExportDataPathKey;
+    private final ActivityResultLauncher<Intent> requestImportPathLauncher =
+            registerForActivityResult(new ActivityResultContracts.StartActivityForResult(),
+                    this::requestImportPathResult);
+    private final ActivityResultLauncher<Intent> requestExportPathLauncher =
+            registerForActivityResult(new ActivityResultContracts.StartActivityForResult(),
+                    this::requestExportPathResult);
+
+
+    @Override
+    public void onCreatePreferences(@Nullable final Bundle savedInstanceState,
+                                    @Nullable final String rootKey) {
+        final File homeDir = ContextCompat.getDataDir(requireContext());
+        Objects.requireNonNull(homeDir);
+        manager = new ImportExportManager(new BackupFileLocator(homeDir));
+
+        importExportDataPathKey = getString(R.string.import_export_data_path);
+
+
+        addPreferencesFromResourceRegistry();
+
+        final Preference importDataPreference = requirePreference(R.string.import_data);
+        importDataPreference.setOnPreferenceClickListener((Preference p) -> {
+            NoFileManagerSafeGuard.launchSafe(
+                    requestImportPathLauncher,
+                    StoredFileHelper.getPicker(requireContext(),
+                            ZIP_MIME_TYPE, getImportExportDataUri()),
+                    TAG,
+                    getContext()
+            );
+
+            return true;
+        });
+
+        final Preference exportDataPreference = requirePreference(R.string.export_data);
+        exportDataPreference.setOnPreferenceClickListener((final Preference p) -> {
+            NoFileManagerSafeGuard.launchSafe(
+                    requestExportPathLauncher,
+                    StoredFileHelper.getNewPicker(requireContext(),
+                            "NewPipeData-" + exportDateFormat.format(new Date()) + ".zip",
+                            ZIP_MIME_TYPE, getImportExportDataUri()),
+                    TAG,
+                    getContext()
+            );
+
+            return true;
+        });
+
+        final Preference resetSettings = findPreference(getString(R.string.reset_settings));
+        // Resets all settings by deleting shared preference and restarting the app
+        // A dialogue will pop up to confirm if user intends to reset all settings
+        assert resetSettings != null;
+        resetSettings.setOnPreferenceClickListener(preference -> {
+            // Show Alert Dialogue
+            final AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
+            builder.setMessage(R.string.reset_all_settings);
+            builder.setCancelable(true);
+            builder.setPositiveButton(R.string.ok, (dialogInterface, i) -> {
+                // Deletes all shared preferences xml files.
+                final SharedPreferences sharedPreferences =
+                        PreferenceManager.getDefaultSharedPreferences(requireContext());
+                sharedPreferences.edit().clear().apply();
+                // Restarts the app
+                if (getActivity() == null) {
+                    return;
+                }
+                NavigationHelper.restartApp(getActivity());
+            });
+            builder.setNegativeButton(R.string.cancel, (dialogInterface, i) -> {
+            });
+            final AlertDialog alertDialog = builder.create();
+            alertDialog.show();
+            return true;
+        });
+    }
+
+    private void requestExportPathResult(final ActivityResult result) {
+        assureCorrectAppLanguage(requireContext());
+        if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
+            // will be saved only on success
+            final Uri lastExportDataUri = result.getData().getData();
+
+            final StoredFileHelper file = new StoredFileHelper(
+                    requireContext(), result.getData().getData(), ZIP_MIME_TYPE);
+
+            exportDatabase(file, lastExportDataUri);
+        }
+    }
+
+    private void requestImportPathResult(final ActivityResult result) {
+        assureCorrectAppLanguage(requireContext());
+        if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
+            // will be saved only on success
+            final Uri lastImportDataUri = result.getData().getData();
+
+            final StoredFileHelper file = new StoredFileHelper(
+                    requireContext(), result.getData().getData(), ZIP_MIME_TYPE);
+
+            new androidx.appcompat.app.AlertDialog.Builder(requireActivity())
+                    .setMessage(R.string.override_current_data)
+                    .setPositiveButton(R.string.ok, (d, id) ->
+                            importDatabase(file, lastImportDataUri))
+                    .setNegativeButton(R.string.cancel, (d, id) ->
+                            d.cancel())
+                    .show();
+        }
+    }
+
+    private void exportDatabase(final StoredFileHelper file, final Uri exportDataUri) {
+        try {
+            //checkpoint before export
+            NewPipeDatabase.checkpoint();
+
+            final SharedPreferences preferences = PreferenceManager
+                    .getDefaultSharedPreferences(requireContext());
+            manager.exportDatabase(preferences, file);
+
+            saveLastImportExportDataUri(exportDataUri); // save export path only on success
+            Toast.makeText(requireContext(), R.string.export_complete_toast, Toast.LENGTH_SHORT)
+                    .show();
+        } catch (final Exception e) {
+            showErrorSnackbar(e, "Exporting database and settings");
+        }
+    }
+
+    private void importDatabase(final StoredFileHelper file, final Uri importDataUri) {
+        // check if file is supported
+        if (!ZipHelper.isValidZipFile(file)) {
+            Toast.makeText(requireContext(), R.string.no_valid_zip_file, Toast.LENGTH_SHORT)
+                    .show();
+            return;
+        }
+
+        try {
+            if (!manager.ensureDbDirectoryExists()) {
+                throw new IOException("Could not create databases dir");
+            }
+
+            // replace the current database
+            if (!manager.extractDb(file)) {
+                Toast.makeText(requireContext(), R.string.could_not_import_all_files,
+                                Toast.LENGTH_LONG)
+                        .show();
+            }
+
+            // if settings file exist, ask if it should be imported.
+            final boolean hasJsonPrefs = manager.exportHasJsonPrefs(file);
+            if (hasJsonPrefs || manager.exportHasSerializedPrefs(file)) {
+                new androidx.appcompat.app.AlertDialog.Builder(requireContext())
+                        .setTitle(R.string.import_settings)
+                        .setMessage(hasJsonPrefs ? null : requireContext()
+                                .getString(R.string.import_settings_vulnerable_format))
+                        .setOnDismissListener(dialog -> finishImport(importDataUri))
+                        .setNegativeButton(R.string.cancel, (dialog, which) -> {
+                            dialog.dismiss();
+                            finishImport(importDataUri);
+                        })
+                        .setPositiveButton(R.string.ok, (dialog, which) -> {
+                            dialog.dismiss();
+                            final Context context = requireContext();
+                            final SharedPreferences prefs = PreferenceManager
+                                    .getDefaultSharedPreferences(context);
+                            try {
+                                if (hasJsonPrefs) {
+                                    manager.loadJsonPrefs(file, prefs);
+                                } else {
+                                    manager.loadSerializedPrefs(file, prefs);
+                                }
+                            } catch (IOException | ClassNotFoundException | JsonParserException e) {
+                                createErrorNotification(e, "Importing preferences");
+                                return;
+                            }
+                            cleanImport(context, prefs);
+                            finishImport(importDataUri);
+                        })
+                        .show();
+            } else {
+                finishImport(importDataUri);
+            }
+        } catch (final Exception e) {
+            showErrorSnackbar(e, "Importing database and settings");
+        }
+    }
+
+    /**
+     * Remove settings that are not supposed to be imported on different devices
+     * and reset them to default values.
+     * @param context the context used for the import
+     * @param prefs the preferences used while running the import
+     */
+    private void cleanImport(@NonNull final Context context,
+                             @NonNull final SharedPreferences prefs) {
+        // Check if media tunnelling needs to be disabled automatically,
+        // if it was disabled automatically in the imported preferences.
+        final String tunnelingKey = context.getString(R.string.disable_media_tunneling_key);
+        final String automaticTunnelingKey =
+                context.getString(R.string.disabled_media_tunneling_automatically_key);
+        // R.string.disable_media_tunneling_key should always be true
+        // if R.string.disabled_media_tunneling_automatically_key equals 1,
+        // but we double check here just to be sure and to avoid regressions
+        // caused by possible later modification of the media tunneling functionality.
+        // R.string.disabled_media_tunneling_automatically_key == 0:
+        //     automatic value overridden by user in settings
+        // R.string.disabled_media_tunneling_automatically_key == -1: not set
+        final boolean wasMediaTunnelingDisabledAutomatically =
+                prefs.getInt(automaticTunnelingKey, -1) == 1
+                        && prefs.getBoolean(tunnelingKey, false);
+        if (wasMediaTunnelingDisabledAutomatically) {
+            prefs.edit()
+                    .putInt(automaticTunnelingKey, -1)
+                    .putBoolean(tunnelingKey, false)
+                    .apply();
+            NewPipeSettings.setMediaTunneling(context);
+        }
+    }
+
+    /**
+     * Save import path and restart app.
+     *
+     * @param importDataUri The import path to save
+     */
+    private void finishImport(final Uri importDataUri) {
+        // save import path only on success
+        saveLastImportExportDataUri(importDataUri);
+        // restart app to properly load db
+        NavigationHelper.restartApp(requireActivity());
+    }
+
+    private Uri getImportExportDataUri() {
+        final String path = defaultPreferences.getString(importExportDataPathKey, null);
+        return isBlank(path) ? null : Uri.parse(path);
+    }
+
+    private void saveLastImportExportDataUri(final Uri importExportDataUri) {
+        final SharedPreferences.Editor editor = defaultPreferences.edit()
+                .putString(importExportDataPathKey, importExportDataUri.toString());
+        editor.apply();
+    }
+
+    private void showErrorSnackbar(final Throwable e, final String request) {
+        ErrorUtil.showSnackbar(this, new ErrorInfo(e, UserAction.DATABASE_IMPORT_EXPORT, request));
+    }
+
+    private void createErrorNotification(final Throwable e, final String request) {
+        ErrorUtil.createNotification(
+                requireContext(),
+                new ErrorInfo(e, UserAction.DATABASE_IMPORT_EXPORT, request)
+        );
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/ContentSettingsFragment.java

@@ -1,106 +1,36 @@
 package org.schabi.newpipe.settings;
 
-import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
-import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
-
-import android.app.Activity;
 import android.content.Context;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.net.Uri;
 import android.os.Bundle;
 import android.util.Log;
 import android.widget.Toast;
 
-import androidx.activity.result.ActivityResult;
-import androidx.activity.result.ActivityResultLauncher;
-import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult;
-import androidx.annotation.NonNull;
-import androidx.appcompat.app.AlertDialog;
-import androidx.core.content.ContextCompat;
 import androidx.preference.Preference;
-import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.DownloaderImpl;
-import org.schabi.newpipe.NewPipeDatabase;
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.localization.ContentCountry;
 import org.schabi.newpipe.extractor.localization.Localization;
-import org.schabi.newpipe.streams.io.NoFileManagerSafeGuard;
-import org.schabi.newpipe.streams.io.StoredFileHelper;
-import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.image.ImageStrategy;
 import org.schabi.newpipe.util.image.PicassoHelper;
-import org.schabi.newpipe.util.ZipHelper;
 import org.schabi.newpipe.util.image.PreferredImageQuality;
 
-import java.io.File;
 import java.io.IOException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.Locale;
-import java.util.Objects;
 
 public class ContentSettingsFragment extends BasePreferenceFragment {
-    private static final String ZIP_MIME_TYPE = "application/zip";
-
-    private final SimpleDateFormat exportDateFormat =
-            new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
-
-    private ContentSettingsManager manager;
-
-    private String importExportDataPathKey;
     private String youtubeRestrictedModeEnabledKey;
 
     private Localization initialSelectedLocalization;
     private ContentCountry initialSelectedContentCountry;
     private String initialLanguage;
-    private final ActivityResultLauncher<Intent> requestImportPathLauncher =
-            registerForActivityResult(new StartActivityForResult(), this::requestImportPathResult);
-    private final ActivityResultLauncher<Intent> requestExportPathLauncher =
-            registerForActivityResult(new StartActivityForResult(), this::requestExportPathResult);
 
     @Override
     public void onCreatePreferences(final Bundle savedInstanceState, final String rootKey) {
-        final File homeDir = ContextCompat.getDataDir(requireContext());
-        Objects.requireNonNull(homeDir);
-        manager = new ContentSettingsManager(new NewPipeFileLocator(homeDir));
-        manager.deleteSettingsFile();
-
-        importExportDataPathKey = getString(R.string.import_export_data_path);
         youtubeRestrictedModeEnabledKey = getString(R.string.youtube_restricted_mode_enabled);
 
         addPreferencesFromResourceRegistry();
 
-        final Preference importDataPreference = requirePreference(R.string.import_data);
-        importDataPreference.setOnPreferenceClickListener((Preference p) -> {
-            NoFileManagerSafeGuard.launchSafe(
-                    requestImportPathLauncher,
-                    StoredFileHelper.getPicker(requireContext(),
-                            ZIP_MIME_TYPE, getImportExportDataUri()),
-                    TAG,
-                    getContext()
-            );
-
-            return true;
-        });
-
-        final Preference exportDataPreference = requirePreference(R.string.export_data);
-        exportDataPreference.setOnPreferenceClickListener((final Preference p) -> {
-            NoFileManagerSafeGuard.launchSafe(
-                    requestExportPathLauncher,
-                    StoredFileHelper.getNewPicker(requireContext(),
-                            "NewPipeData-" + exportDateFormat.format(new Date()) + ".zip",
-                            ZIP_MIME_TYPE, getImportExportDataUri()),
-                    TAG,
-                    getContext()
-            );
-
-            return true;
-        });
-
         initialSelectedLocalization = org.schabi.newpipe.util.Localization
                 .getPreferredLocalization(requireContext());
         initialSelectedContentCountry = org.schabi.newpipe.util.Localization
@@ -158,151 +88,4 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
             NewPipe.setupLocalization(selectedLocalization, selectedContentCountry);
         }
     }
-
-    private void requestExportPathResult(final ActivityResult result) {
-        assureCorrectAppLanguage(getContext());
-        if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
-            // will be saved only on success
-            final Uri lastExportDataUri = result.getData().getData();
-
-            final StoredFileHelper file =
-                    new StoredFileHelper(getContext(), result.getData().getData(), ZIP_MIME_TYPE);
-
-            exportDatabase(file, lastExportDataUri);
-        }
-    }
-
-    private void requestImportPathResult(final ActivityResult result) {
-        assureCorrectAppLanguage(getContext());
-        if (result.getResultCode() == Activity.RESULT_OK && result.getData() != null) {
-            // will be saved only on success
-            final Uri lastImportDataUri = result.getData().getData();
-
-            final StoredFileHelper file =
-                    new StoredFileHelper(getContext(), result.getData().getData(), ZIP_MIME_TYPE);
-
-            new AlertDialog.Builder(requireActivity())
-                    .setMessage(R.string.override_current_data)
-                    .setPositiveButton(R.string.ok, (d, id) ->
-                            importDatabase(file, lastImportDataUri))
-                    .setNegativeButton(R.string.cancel, (d, id) ->
-                            d.cancel())
-                    .show();
-        }
-    }
-
-    private void exportDatabase(final StoredFileHelper file, final Uri exportDataUri) {
-        try {
-            //checkpoint before export
-            NewPipeDatabase.checkpoint();
-
-            final SharedPreferences preferences = PreferenceManager
-                    .getDefaultSharedPreferences(requireContext());
-            manager.exportDatabase(preferences, file);
-
-            saveLastImportExportDataUri(exportDataUri); // save export path only on success
-            Toast.makeText(getContext(), R.string.export_complete_toast, Toast.LENGTH_SHORT).show();
-        } catch (final Exception e) {
-            ErrorUtil.showUiErrorSnackbar(this, "Exporting database", e);
-        }
-    }
-
-    private void importDatabase(final StoredFileHelper file, final Uri importDataUri) {
-        // check if file is supported
-        if (!ZipHelper.isValidZipFile(file)) {
-            Toast.makeText(getContext(), R.string.no_valid_zip_file, Toast.LENGTH_SHORT)
-                    .show();
-            return;
-        }
-
-        try {
-            if (!manager.ensureDbDirectoryExists()) {
-                throw new IOException("Could not create databases dir");
-            }
-
-            if (!manager.extractDb(file)) {
-                Toast.makeText(getContext(), R.string.could_not_import_all_files, Toast.LENGTH_LONG)
-                    .show();
-            }
-
-            // if settings file exist, ask if it should be imported.
-            if (manager.extractSettings(file)) {
-                new AlertDialog.Builder(requireContext())
-                        .setTitle(R.string.import_settings)
-                        .setNegativeButton(R.string.cancel, (dialog, which) -> {
-                            dialog.dismiss();
-                            finishImport(importDataUri);
-                        })
-                        .setPositiveButton(R.string.ok, (dialog, which) -> {
-                            dialog.dismiss();
-                            final Context context = requireContext();
-                            final SharedPreferences prefs = PreferenceManager
-                                    .getDefaultSharedPreferences(context);
-                            manager.loadSharedPreferences(prefs);
-                            cleanImport(context, prefs);
-                            finishImport(importDataUri);
-                        })
-                        .show();
-            } else {
-                finishImport(importDataUri);
-            }
-        } catch (final Exception e) {
-            ErrorUtil.showUiErrorSnackbar(this, "Importing database", e);
-        }
-    }
-
-    /**
-     * Remove settings that are not supposed to be imported on different devices
-     * and reset them to default values.
-     * @param context the context used for the import
-     * @param prefs the preferences used while running the import
-     */
-    private void cleanImport(@NonNull final Context context,
-                             @NonNull final SharedPreferences prefs) {
-        // Check if media tunnelling needs to be disabled automatically,
-        // if it was disabled automatically in the imported preferences.
-        final String tunnelingKey = context.getString(R.string.disable_media_tunneling_key);
-        final String automaticTunnelingKey =
-                context.getString(R.string.disabled_media_tunneling_automatically_key);
-        // R.string.disable_media_tunneling_key should always be true
-        // if R.string.disabled_media_tunneling_automatically_key equals 1,
-        // but we double check here just to be sure and to avoid regressions
-        // caused by possible later modification of the media tunneling functionality.
-        // R.string.disabled_media_tunneling_automatically_key == 0:
-        //     automatic value overridden by user in settings
-        // R.string.disabled_media_tunneling_automatically_key == -1: not set
-        final boolean wasMediaTunnelingDisabledAutomatically =
-                prefs.getInt(automaticTunnelingKey, -1) == 1
-                        && prefs.getBoolean(tunnelingKey, false);
-        if (wasMediaTunnelingDisabledAutomatically) {
-            prefs.edit()
-                    .putInt(automaticTunnelingKey, -1)
-                    .putBoolean(tunnelingKey, false)
-                    .apply();
-            NewPipeSettings.setMediaTunneling(context);
-        }
-    }
-
-    /**
-     * Save import path and restart system.
-     *
-     * @param importDataUri The import path to save
-     */
-    private void finishImport(final Uri importDataUri) {
-        // save import path only on success
-        saveLastImportExportDataUri(importDataUri);
-        // restart app to properly load db
-        NavigationHelper.restartApp(requireActivity());
-    }
-
-    private Uri getImportExportDataUri() {
-        final String path = defaultPreferences.getString(importExportDataPathKey, null);
-        return isBlank(path) ? null : Uri.parse(path);
-    }
-
-    private void saveLastImportExportDataUri(final Uri importExportDataUri) {
-        final SharedPreferences.Editor editor = defaultPreferences.edit()
-                .putString(importExportDataPathKey, importExportDataUri.toString());
-        editor.apply();
-    }
 }

app/src/main/java/org/schabi/newpipe/settings/ContentSettingsManager.kt

@@ -1,120 +0,0 @@
-package org.schabi.newpipe.settings
-
-import android.content.SharedPreferences
-import android.util.Log
-import org.schabi.newpipe.MainActivity.DEBUG
-import org.schabi.newpipe.streams.io.SharpOutputStream
-import org.schabi.newpipe.streams.io.StoredFileHelper
-import org.schabi.newpipe.util.ZipHelper
-import java.io.IOException
-import java.io.ObjectInputStream
-import java.io.ObjectOutputStream
-import java.util.zip.ZipOutputStream
-
-class ContentSettingsManager(private val fileLocator: NewPipeFileLocator) {
-    companion object {
-        const val TAG = "ContentSetManager"
-    }
-
-    /**
-     * Exports given [SharedPreferences] to the file in given outputPath.
-     * It also creates the file.
-     */
-    @Throws(Exception::class)
-    fun exportDatabase(preferences: SharedPreferences, file: StoredFileHelper) {
-        file.create()
-        ZipOutputStream(SharpOutputStream(file.stream).buffered())
-            .use { outZip ->
-                ZipHelper.addFileToZip(outZip, fileLocator.db.path, "newpipe.db")
-
-                try {
-                    ObjectOutputStream(fileLocator.settings.outputStream()).use { output ->
-                        output.writeObject(preferences.all)
-                        output.flush()
-                    }
-                } catch (e: IOException) {
-                    if (DEBUG) {
-                        Log.e(TAG, "Unable to exportDatabase", e)
-                    }
-                }
-
-                ZipHelper.addFileToZip(outZip, fileLocator.settings.path, "newpipe.settings")
-            }
-    }
-
-    fun deleteSettingsFile() {
-        fileLocator.settings.delete()
-    }
-
-    /**
-     * Tries to create database directory if it does not exist.
-     *
-     * @return Whether the directory exists afterwards.
-     */
-    fun ensureDbDirectoryExists(): Boolean {
-        return fileLocator.dbDir.exists() || fileLocator.dbDir.mkdir()
-    }
-
-    fun extractDb(file: StoredFileHelper): Boolean {
-        val success = ZipHelper.extractFileFromZip(file, fileLocator.db.path, "newpipe.db")
-        if (success) {
-            fileLocator.dbJournal.delete()
-            fileLocator.dbWal.delete()
-            fileLocator.dbShm.delete()
-        }
-
-        return success
-    }
-
-    fun extractSettings(file: StoredFileHelper): Boolean {
-        return ZipHelper.extractFileFromZip(file, fileLocator.settings.path, "newpipe.settings")
-    }
-
-    /**
-     * Remove all shared preferences from the app and load the preferences supplied to the manager.
-     */
-    fun loadSharedPreferences(preferences: SharedPreferences) {
-        try {
-            val preferenceEditor = preferences.edit()
-
-            ObjectInputStream(fileLocator.settings.inputStream()).use { input ->
-                preferenceEditor.clear()
-                @Suppress("UNCHECKED_CAST")
-                val entries = input.readObject() as Map<String, *>
-                for ((key, value) in entries) {
-                    when (value) {
-                        is Boolean -> {
-                            preferenceEditor.putBoolean(key, value)
-                        }
-                        is Float -> {
-                            preferenceEditor.putFloat(key, value)
-                        }
-                        is Int -> {
-                            preferenceEditor.putInt(key, value)
-                        }
-                        is Long -> {
-                            preferenceEditor.putLong(key, value)
-                        }
-                        is String -> {
-                            preferenceEditor.putString(key, value)
-                        }
-                        is Set<*> -> {
-                            // There are currently only Sets with type String possible
-                            @Suppress("UNCHECKED_CAST")
-                            preferenceEditor.putStringSet(key, value as Set<String>?)
-                        }
-                    }
-                }
-                preferenceEditor.commit()
-            }
-        } catch (e: IOException) {
-            if (DEBUG) {
-                Log.e(TAG, "Unable to loadSharedPreferences", e)
-            }
-        } catch (e: ClassNotFoundException) {
-            if (DEBUG) {
-                Log.e(TAG, "Unable to loadSharedPreferences", e)
-            }
-        }
-    }
-}

app/src/main/java/org/schabi/newpipe/settings/MainSettingsFragment.java

@@ -23,7 +23,7 @@ public class MainSettingsFragment extends BasePreferenceFragment {
         setHasOptionsMenu(true); // Otherwise onCreateOptionsMenu is not called
 
         // Check if the app is updatable
-        if (!ReleaseVersionUtil.isReleaseApk()) {
+        if (!ReleaseVersionUtil.INSTANCE.isReleaseApk()) {
             getPreferenceScreen().removePreference(
                     findPreference(getString(R.string.update_pref_screen_key)));
 

app/src/main/java/org/schabi/newpipe/settings/NewPipeFileLocator.kt

@@ -1,21 +0,0 @@
-package org.schabi.newpipe.settings
-
-import java.io.File
-
-/**
- * Locates specific files of NewPipe based on the home directory of the app.
- */
-class NewPipeFileLocator(private val homeDir: File) {
-
-    val dbDir by lazy { File(homeDir, "/databases") }
-
-    val db by lazy { File(homeDir, "/databases/newpipe.db") }
-
-    val dbJournal by lazy { File(homeDir, "/databases/newpipe.db-journal") }
-
-    val dbShm by lazy { File(homeDir, "/databases/newpipe.db-shm") }
-
-    val dbWal by lazy { File(homeDir, "/databases/newpipe.db-wal") }
-
-    val settings by lazy { File(homeDir, "/databases/newpipe.settings") }
-}

app/src/main/java/org/schabi/newpipe/settings/NewPipeSettings.java

@@ -11,6 +11,7 @@ import androidx.annotation.NonNull;
 import androidx.annotation.StringRes;
 import androidx.preference.PreferenceManager;
 
+import org.schabi.newpipe.App;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.util.DeviceUtils;
 
@@ -44,14 +45,8 @@ public final class NewPipeSettings {
     private NewPipeSettings() { }
 
     public static void initSettings(final Context context) {
-        // check if the last used preference version is set
-        // to determine whether this is the first app run
-        final int lastUsedPrefVersion = PreferenceManager.getDefaultSharedPreferences(context)
-                .getInt(context.getString(R.string.last_used_preferences_version), -1);
-        final boolean isFirstRun = lastUsedPrefVersion == -1;
-
         // first run migrations, then setDefaultValues, since the latter requires the correct types
-        SettingMigrations.runMigrationsIfNeeded(context, isFirstRun);
+        SettingMigrations.runMigrationsIfNeeded(context);
 
         // readAgain is true so that if new settings are added their default value is set
         PreferenceManager.setDefaultValues(context, R.xml.main_settings, true);
@@ -63,11 +58,12 @@ public final class NewPipeSettings {
         PreferenceManager.setDefaultValues(context, R.xml.player_notification_settings, true);
         PreferenceManager.setDefaultValues(context, R.xml.update_settings, true);
         PreferenceManager.setDefaultValues(context, R.xml.debug_settings, true);
+        PreferenceManager.setDefaultValues(context, R.xml.backup_restore_settings, true);
 
         saveDefaultVideoDownloadDirectory(context);
         saveDefaultAudioDownloadDirectory(context);
 
-        disableMediaTunnelingIfNecessary(context, isFirstRun);
+        disableMediaTunnelingIfNecessary(context);
     }
 
     static void saveDefaultVideoDownloadDirectory(final Context context) {
@@ -145,8 +141,7 @@ public final class NewPipeSettings {
                 R.string.show_remote_search_suggestions_key);
     }
 
-    private static void disableMediaTunnelingIfNecessary(@NonNull final Context context,
-                                                         final boolean isFirstRun) {
+    private static void disableMediaTunnelingIfNecessary(@NonNull final Context context) {
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         final String disabledTunnelingKey = context.getString(R.string.disable_media_tunneling_key);
         final String disabledTunnelingAutomaticallyKey =
@@ -161,7 +156,7 @@ public final class NewPipeSettings {
                 prefs.getInt(disabledTunnelingAutomaticallyKey, -1) == 0
                         && !prefs.getBoolean(disabledTunnelingKey, false);
 
-        if (Boolean.TRUE.equals(isFirstRun)
+        if (App.getApp().isFirstRun()
                 || (wasDeviceBlacklistUpdated && !wasMediaTunnelingEnabledByUser)) {
             setMediaTunneling(context);
         }

app/src/main/java/org/schabi/newpipe/settings/SelectPlaylistFragment.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe.settings;
 
+import static org.schabi.newpipe.local.bookmark.MergedPlaylistManager.getMergedOrderedPlaylists;
+
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -31,7 +33,6 @@ import java.util.List;
 import java.util.Vector;
 
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
-import io.reactivex.rxjava3.core.Flowable;
 import io.reactivex.rxjava3.disposables.Disposable;
 
 public class SelectPlaylistFragment extends DialogFragment {
@@ -90,8 +91,7 @@ public class SelectPlaylistFragment extends DialogFragment {
         final LocalPlaylistManager localPlaylistManager = new LocalPlaylistManager(database);
         final RemotePlaylistManager remotePlaylistManager = new RemotePlaylistManager(database);
 
-        disposable = Flowable.combineLatest(localPlaylistManager.getPlaylists(),
-                remotePlaylistManager.getPlaylists(), PlaylistLocalItem::merge)
+        disposable = getMergedOrderedPlaylists(localPlaylistManager, remotePlaylistManager)
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(this::displayPlaylists, this::onError);
     }
@@ -118,7 +118,7 @@ public class SelectPlaylistFragment extends DialogFragment {
 
             if (selectedItem instanceof PlaylistMetadataEntry) {
                 final PlaylistMetadataEntry entry = ((PlaylistMetadataEntry) selectedItem);
-                onSelectedListener.onLocalPlaylistSelected(entry.uid, entry.name);
+                onSelectedListener.onLocalPlaylistSelected(entry.getUid(), entry.name);
 
             } else if (selectedItem instanceof PlaylistRemoteEntity) {
                 final PlaylistRemoteEntity entry = ((PlaylistRemoteEntity) selectedItem);

app/src/main/java/org/schabi/newpipe/settings/SettingMigrations.java

@@ -7,6 +7,7 @@ import android.util.Log;
 import androidx.annotation.NonNull;
 import androidx.preference.PreferenceManager;
 
+import org.schabi.newpipe.App;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.ErrorUtil;
@@ -163,15 +164,14 @@ public final class SettingMigrations {
     private static final int VERSION = 6;
 
 
-    public static void runMigrationsIfNeeded(@NonNull final Context context,
-                                             final boolean isFirstRun) {
+    public static void runMigrationsIfNeeded(@NonNull final Context context) {
         // setup migrations and check if there is something to do
         sp = PreferenceManager.getDefaultSharedPreferences(context);
         final String lastPrefVersionKey = context.getString(R.string.last_used_preferences_version);
         final int lastPrefVersion = sp.getInt(lastPrefVersionKey, 0);
 
         // no migration to run, already up to date
-        if (isFirstRun) {
+        if (App.getApp().isFirstRun()) {
             sp.edit().putInt(lastPrefVersionKey, VERSION).apply();
             return;
         } else if (lastPrefVersion == VERSION) {

app/src/main/java/org/schabi/newpipe/settings/SettingsActivity.java

@@ -266,7 +266,7 @@ public class SettingsActivity extends AppCompatActivity implements
      */
     private void ensureSearchRepresentsApplicationState() {
         // Check if the update settings are available
-        if (!ReleaseVersionUtil.isReleaseApk()) {
+        if (!ReleaseVersionUtil.INSTANCE.isReleaseApk()) {
             SettingsResourceRegistry.getInstance()
                     .getEntryByPreferencesResId(R.xml.update_settings)
                     .setSearchable(false);

app/src/main/java/org/schabi/newpipe/settings/SettingsResourceRegistry.java

@@ -41,6 +41,7 @@ public final class SettingsResourceRegistry {
         add(UpdateSettingsFragment.class, R.xml.update_settings);
         add(VideoAudioSettingsFragment.class, R.xml.video_audio_settings);
         add(ExoPlayerSettingsFragment.class, R.xml.exoplayer_settings);
+        add(BackupRestoreSettingsFragment.class, R.xml.backup_restore_settings);
     }
 
     private SettingRegistryEntry add(

app/src/main/java/org/schabi/newpipe/settings/UpdateSettingsFragment.java

@@ -1,9 +1,12 @@
 package org.schabi.newpipe.settings;
 
+import android.app.AlertDialog;
+import android.content.Context;
 import android.os.Bundle;
 import android.widget.Toast;
 
 import androidx.preference.Preference;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.NewVersionWorker;
 import org.schabi.newpipe.R;
@@ -36,4 +39,38 @@ public class UpdateSettingsFragment extends BasePreferenceFragment {
         findPreference(getString(R.string.manual_update_key))
                 .setOnPreferenceClickListener(manualUpdateClick);
     }
+
+    public static void askForConsentToUpdateChecks(final Context context) {
+        new AlertDialog.Builder(context)
+                .setTitle(context.getString(R.string.check_for_updates))
+                .setMessage(context.getString(R.string.auto_update_check_description))
+                .setPositiveButton(context.getString(R.string.yes), (d, w) -> {
+                    d.dismiss();
+                    setAutoUpdateCheckEnabled(context, true);
+                })
+                .setNegativeButton(R.string.no, (d, w) -> {
+                    d.dismiss();
+                    // set explicitly to false, since the default is true on previous versions
+                    setAutoUpdateCheckEnabled(context, false);
+                })
+                .show();
+    }
+
+    private static void setAutoUpdateCheckEnabled(final Context context, final boolean enabled) {
+        PreferenceManager.getDefaultSharedPreferences(context)
+                .edit()
+                .putBoolean(context.getString(R.string.update_app_key), enabled)
+                .putBoolean(context.getString(R.string.update_check_consent_key), true)
+                .apply();
+    }
+
+    /**
+     * Whether the user was asked for consent to automatically check for app updates.
+     * @param context
+     * @return true if the user was asked for consent, false otherwise
+     */
+    public static boolean wasUserAskedForConsent(final Context context) {
+        return PreferenceManager.getDefaultSharedPreferences(context)
+                .getBoolean(context.getString(R.string.update_check_consent_key), false);
+    }
 }

app/src/main/java/org/schabi/newpipe/settings/custom/NotificationActionsPreference.java

@@ -5,35 +5,22 @@ import static org.schabi.newpipe.player.notification.NotificationConstants.ACTIO
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.content.res.ColorStateList;
+import android.os.Build;
 import android.util.AttributeSet;
-import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
 import android.widget.CheckBox;
-import android.widget.ImageView;
-import android.widget.RadioButton;
-import android.widget.RadioGroup;
 import android.widget.TextView;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.appcompat.app.AlertDialog;
-import androidx.appcompat.content.res.AppCompatResources;
-import androidx.core.widget.TextViewCompat;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceViewHolder;
 
 import org.schabi.newpipe.App;
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.databinding.ListRadioIconItemBinding;
-import org.schabi.newpipe.databinding.SingleChoiceDialogViewBinding;
 import org.schabi.newpipe.player.notification.NotificationConstants;
-import org.schabi.newpipe.util.DeviceUtils;
-import org.schabi.newpipe.util.ThemeHelper;
-import org.schabi.newpipe.views.FocusOverlayView;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.IntStream;
 
@@ -45,8 +32,9 @@ public class NotificationActionsPreference extends Preference {
     }
 
 
-    @Nullable private NotificationSlot[] notificationSlots = null;
-    @Nullable private List<Integer> compactSlots = null;
+    private NotificationSlot[] notificationSlots;
+    private List<Integer> compactSlots;
+
 
     ////////////////////////////////////////////////////////////////////////////
     // Lifecycle
@@ -56,6 +44,11 @@ public class NotificationActionsPreference extends Preference {
     public void onBindViewHolder(@NonNull final PreferenceViewHolder holder) {
         super.onBindViewHolder(holder);
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            ((TextView) holder.itemView.findViewById(R.id.summary))
+                    .setText(R.string.notification_actions_summary_android13);
+        }
+
         holder.itemView.setClickable(false);
         setupActions(holder.itemView);
     }
@@ -75,13 +68,29 @@ public class NotificationActionsPreference extends Preference {
     ////////////////////////////////////////////////////////////////////////////
 
     private void setupActions(@NonNull final View view) {
-        compactSlots = NotificationConstants.getCompactSlotsFromPreferences(getContext(),
-                getSharedPreferences(), 5);
+        compactSlots = new ArrayList<>(NotificationConstants.getCompactSlotsFromPreferences(
+                getContext(), getSharedPreferences()));
         notificationSlots = IntStream.range(0, 5)
-                .mapToObj(i -> new NotificationSlot(i, view))
+                .mapToObj(i -> new NotificationSlot(getContext(), getSharedPreferences(), i, view,
+                        compactSlots.contains(i), this::onToggleCompactSlot))
                 .toArray(NotificationSlot[]::new);
     }
 
+    private void onToggleCompactSlot(final int i, final CheckBox checkBox) {
+        if (checkBox.isChecked()) {
+            compactSlots.remove((Integer) i);
+        } else if (compactSlots.size() < 3) {
+            compactSlots.add(i);
+        } else {
+            Toast.makeText(getContext(),
+                    R.string.notification_actions_at_most_three,
+                    Toast.LENGTH_SHORT).show();
+            return;
+        }
+
+        checkBox.toggle();
+    }
+
 
     ////////////////////////////////////////////////////////////////////////////
     // Saving
@@ -99,143 +108,10 @@ public class NotificationActionsPreference extends Preference {
 
             for (int i = 0; i < 5; i++) {
                 editor.putInt(getContext().getString(NotificationConstants.SLOT_PREF_KEYS[i]),
-                        notificationSlots[i].selectedAction);
+                        notificationSlots[i].getSelectedAction());
             }
 
             editor.apply();
         }
     }
-
-
-    ////////////////////////////////////////////////////////////////////////////
-    // Notification action
-    ////////////////////////////////////////////////////////////////////////////
-
-    private static final int[] SLOT_ITEMS = {
-            R.id.notificationAction0,
-            R.id.notificationAction1,
-            R.id.notificationAction2,
-            R.id.notificationAction3,
-            R.id.notificationAction4,
-    };
-
-    private static final int[] SLOT_TITLES = {
-            R.string.notification_action_0_title,
-            R.string.notification_action_1_title,
-            R.string.notification_action_2_title,
-            R.string.notification_action_3_title,
-            R.string.notification_action_4_title,
-    };
-
-    private class NotificationSlot {
-
-        final int i;
-        @NotificationConstants.Action int selectedAction;
-
-        ImageView icon;
-        TextView summary;
-
-        NotificationSlot(final int actionIndex, final View parentView) {
-            this.i = actionIndex;
-
-            final View view = parentView.findViewById(SLOT_ITEMS[i]);
-            setupSelectedAction(view);
-            setupTitle(view);
-            setupCheckbox(view);
-        }
-
-        void setupTitle(final View view) {
-            ((TextView) view.findViewById(R.id.notificationActionTitle))
-                    .setText(SLOT_TITLES[i]);
-            view.findViewById(R.id.notificationActionClickableArea).setOnClickListener(
-                    v -> openActionChooserDialog());
-        }
-
-        void setupCheckbox(final View view) {
-            final CheckBox compactSlotCheckBox = view.findViewById(R.id.notificationActionCheckBox);
-            compactSlotCheckBox.setChecked(compactSlots.contains(i));
-            view.findViewById(R.id.notificationActionCheckBoxClickableArea).setOnClickListener(
-                    v -> {
-                        if (compactSlotCheckBox.isChecked()) {
-                            compactSlots.remove((Integer) i);
-                        } else if (compactSlots.size() < 3) {
-                            compactSlots.add(i);
-                        } else {
-                            Toast.makeText(getContext(),
-                                    R.string.notification_actions_at_most_three,
-                                    Toast.LENGTH_SHORT).show();
-                            return;
-                        }
-
-                        compactSlotCheckBox.toggle();
-                    });
-        }
-
-        void setupSelectedAction(final View view) {
-            icon = view.findViewById(R.id.notificationActionIcon);
-            summary = view.findViewById(R.id.notificationActionSummary);
-            selectedAction = getSharedPreferences().getInt(
-                    getContext().getString(NotificationConstants.SLOT_PREF_KEYS[i]),
-                    NotificationConstants.SLOT_DEFAULTS[i]);
-            updateInfo();
-        }
-
-        void updateInfo() {
-            if (NotificationConstants.ACTION_ICONS[selectedAction] == 0) {
-                icon.setImageDrawable(null);
-            } else {
-                icon.setImageDrawable(AppCompatResources.getDrawable(getContext(),
-                        NotificationConstants.ACTION_ICONS[selectedAction]));
-            }
-
-            summary.setText(NotificationConstants.getActionName(getContext(), selectedAction));
-        }
-
-        void openActionChooserDialog() {
-            final LayoutInflater inflater = LayoutInflater.from(getContext());
-            final SingleChoiceDialogViewBinding binding =
-                    SingleChoiceDialogViewBinding.inflate(inflater);
-
-            final AlertDialog alertDialog = new AlertDialog.Builder(getContext())
-                    .setTitle(SLOT_TITLES[i])
-                    .setView(binding.getRoot())
-                    .setCancelable(true)
-                    .create();
-
-            final View.OnClickListener radioButtonsClickListener = v -> {
-                selectedAction = NotificationConstants.SLOT_ALLOWED_ACTIONS[i][v.getId()];
-                updateInfo();
-                alertDialog.dismiss();
-            };
-
-            for (int id = 0; id < NotificationConstants.SLOT_ALLOWED_ACTIONS[i].length; ++id) {
-                final int action = NotificationConstants.SLOT_ALLOWED_ACTIONS[i][id];
-                final RadioButton radioButton = ListRadioIconItemBinding.inflate(inflater)
-                        .getRoot();
-
-                // if present set action icon with correct color
-                final int iconId = NotificationConstants.ACTION_ICONS[action];
-                if (iconId != 0) {
-                    radioButton.setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, iconId, 0);
-
-                    final var color = ColorStateList.valueOf(ThemeHelper
-                            .resolveColorFromAttr(getContext(), android.R.attr.textColorPrimary));
-                    TextViewCompat.setCompoundDrawableTintList(radioButton, color);
-                }
-
-                radioButton.setText(NotificationConstants.getActionName(getContext(), action));
-                radioButton.setChecked(action == selectedAction);
-                radioButton.setId(id);
-                radioButton.setLayoutParams(new RadioGroup.LayoutParams(
-                        ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
-                radioButton.setOnClickListener(radioButtonsClickListener);
-                binding.list.addView(radioButton);
-            }
-            alertDialog.show();
-
-            if (DeviceUtils.isTv(getContext())) {
-                FocusOverlayView.setupFocusObserver(alertDialog);
-            }
-        }
-    }
 }

app/src/main/java/org/schabi/newpipe/settings/custom/NotificationSlot.java

@@ -0,0 +1,172 @@
+package org.schabi.newpipe.settings.custom;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.res.ColorStateList;
+import android.os.Build;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CheckBox;
+import android.widget.ImageView;
+import android.widget.RadioButton;
+import android.widget.RadioGroup;
+import android.widget.TextView;
+
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.content.res.AppCompatResources;
+import androidx.core.widget.TextViewCompat;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.databinding.ListRadioIconItemBinding;
+import org.schabi.newpipe.databinding.SingleChoiceDialogViewBinding;
+import org.schabi.newpipe.player.notification.NotificationConstants;
+import org.schabi.newpipe.util.DeviceUtils;
+import org.schabi.newpipe.util.ThemeHelper;
+import org.schabi.newpipe.views.FocusOverlayView;
+
+import java.util.Objects;
+import java.util.function.BiConsumer;
+
+class NotificationSlot {
+
+    private static final int[] SLOT_ITEMS = {
+            R.id.notificationAction0,
+            R.id.notificationAction1,
+            R.id.notificationAction2,
+            R.id.notificationAction3,
+            R.id.notificationAction4,
+    };
+
+    private static final int[] SLOT_TITLES = {
+            R.string.notification_action_0_title,
+            R.string.notification_action_1_title,
+            R.string.notification_action_2_title,
+            R.string.notification_action_3_title,
+            R.string.notification_action_4_title,
+    };
+
+    private final int i;
+    private @NotificationConstants.Action int selectedAction;
+    private final Context context;
+    private final BiConsumer<Integer, CheckBox> onToggleCompactSlot;
+
+    private ImageView icon;
+    private TextView summary;
+
+    NotificationSlot(final Context context,
+                     final SharedPreferences prefs,
+                     final int actionIndex,
+                     final View parentView,
+                     final boolean isCompactSlotChecked,
+                     final BiConsumer<Integer, CheckBox> onToggleCompactSlot) {
+        this.context = context;
+        this.i = actionIndex;
+        this.onToggleCompactSlot = onToggleCompactSlot;
+
+        selectedAction = Objects.requireNonNull(prefs).getInt(
+                context.getString(NotificationConstants.SLOT_PREF_KEYS[i]),
+                NotificationConstants.SLOT_DEFAULTS[i]);
+        final View view = parentView.findViewById(SLOT_ITEMS[i]);
+
+        // only show the last two notification slots on Android 13+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.TIRAMISU || i >= 3) {
+            setupSelectedAction(view);
+            setupTitle(view);
+            setupCheckbox(view, isCompactSlotChecked);
+        } else {
+            view.setVisibility(View.GONE);
+        }
+    }
+
+    void setupTitle(final View view) {
+        ((TextView) view.findViewById(R.id.notificationActionTitle))
+                .setText(SLOT_TITLES[i]);
+        view.findViewById(R.id.notificationActionClickableArea).setOnClickListener(
+                v -> openActionChooserDialog());
+    }
+
+    void setupCheckbox(final View view, final boolean isCompactSlotChecked) {
+        final CheckBox compactSlotCheckBox = view.findViewById(R.id.notificationActionCheckBox);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            // there are no compact slots to customize on Android 13+
+            compactSlotCheckBox.setVisibility(View.GONE);
+            view.findViewById(R.id.notificationActionCheckBoxClickableArea)
+                    .setVisibility(View.GONE);
+            return;
+        }
+
+        compactSlotCheckBox.setChecked(isCompactSlotChecked);
+        view.findViewById(R.id.notificationActionCheckBoxClickableArea).setOnClickListener(
+                v -> onToggleCompactSlot.accept(i, compactSlotCheckBox));
+    }
+
+    void setupSelectedAction(final View view) {
+        icon = view.findViewById(R.id.notificationActionIcon);
+        summary = view.findViewById(R.id.notificationActionSummary);
+        updateInfo();
+    }
+
+    void updateInfo() {
+        if (NotificationConstants.ACTION_ICONS[selectedAction] == 0) {
+            icon.setImageDrawable(null);
+        } else {
+            icon.setImageDrawable(AppCompatResources.getDrawable(context,
+                    NotificationConstants.ACTION_ICONS[selectedAction]));
+        }
+
+        summary.setText(NotificationConstants.getActionName(context, selectedAction));
+    }
+
+    void openActionChooserDialog() {
+        final LayoutInflater inflater = LayoutInflater.from(context);
+        final SingleChoiceDialogViewBinding binding =
+                SingleChoiceDialogViewBinding.inflate(inflater);
+
+        final AlertDialog alertDialog = new AlertDialog.Builder(context)
+                .setTitle(SLOT_TITLES[i])
+                .setView(binding.getRoot())
+                .setCancelable(true)
+                .create();
+
+        final View.OnClickListener radioButtonsClickListener = v -> {
+            selectedAction = NotificationConstants.ALL_ACTIONS[v.getId()];
+            updateInfo();
+            alertDialog.dismiss();
+        };
+
+        for (int id = 0; id < NotificationConstants.ALL_ACTIONS.length; ++id) {
+            final int action = NotificationConstants.ALL_ACTIONS[id];
+            final RadioButton radioButton = ListRadioIconItemBinding.inflate(inflater)
+                    .getRoot();
+
+            // if present set action icon with correct color
+            final int iconId = NotificationConstants.ACTION_ICONS[action];
+            if (iconId != 0) {
+                radioButton.setCompoundDrawablesRelativeWithIntrinsicBounds(0, 0, iconId, 0);
+
+                final var color = ColorStateList.valueOf(ThemeHelper
+                        .resolveColorFromAttr(context, android.R.attr.textColorPrimary));
+                TextViewCompat.setCompoundDrawableTintList(radioButton, color);
+            }
+
+            radioButton.setText(NotificationConstants.getActionName(context, action));
+            radioButton.setChecked(action == selectedAction);
+            radioButton.setId(id);
+            radioButton.setLayoutParams(new RadioGroup.LayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
+            radioButton.setOnClickListener(radioButtonsClickListener);
+            binding.list.addView(radioButton);
+        }
+        alertDialog.show();
+
+        if (DeviceUtils.isTv(context)) {
+            FocusOverlayView.setupFocusObserver(alertDialog);
+        }
+    }
+
+    @NotificationConstants.Action
+    public int getSelectedAction() {
+        return selectedAction;
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/export/BackupFileLocator.kt

@@ -0,0 +1,28 @@
+package org.schabi.newpipe.settings.export
+
+import java.io.File
+
+/**
+ * Locates specific files of NewPipe based on the home directory of the app.
+ */
+class BackupFileLocator(private val homeDir: File) {
+    companion object {
+        const val FILE_NAME_DB = "newpipe.db"
+        @Deprecated(
+            "Serializing preferences with Java's ObjectOutputStream is vulnerable to injections",
+            replaceWith = ReplaceWith("FILE_NAME_JSON_PREFS")
+        )
+        const val FILE_NAME_SERIALIZED_PREFS = "newpipe.settings"
+        const val FILE_NAME_JSON_PREFS = "preferences.json"
+    }
+
+    val dbDir by lazy { File(homeDir, "/databases") }
+
+    val db by lazy { File(dbDir, FILE_NAME_DB) }
+
+    val dbJournal by lazy { File(dbDir, "$FILE_NAME_DB-journal") }
+
+    val dbShm by lazy { File(dbDir, "$FILE_NAME_DB-shm") }
+
+    val dbWal by lazy { File(dbDir, "$FILE_NAME_DB-wal") }
+}

app/src/main/java/org/schabi/newpipe/settings/export/ImportExportManager.kt

@@ -0,0 +1,180 @@
+package org.schabi.newpipe.settings.export
+
+import android.content.SharedPreferences
+import com.grack.nanojson.JsonArray
+import com.grack.nanojson.JsonParser
+import com.grack.nanojson.JsonParserException
+import com.grack.nanojson.JsonWriter
+import org.schabi.newpipe.streams.io.SharpOutputStream
+import org.schabi.newpipe.streams.io.StoredFileHelper
+import org.schabi.newpipe.util.ZipHelper
+import java.io.FileNotFoundException
+import java.io.IOException
+import java.io.ObjectOutputStream
+import java.util.zip.ZipOutputStream
+
+class ImportExportManager(private val fileLocator: BackupFileLocator) {
+    companion object {
+        const val TAG = "ImportExportManager"
+    }
+
+    /**
+     * Exports given [SharedPreferences] to the file in given outputPath.
+     * It also creates the file.
+     */
+    @Throws(Exception::class)
+    fun exportDatabase(preferences: SharedPreferences, file: StoredFileHelper) {
+        file.create()
+        ZipOutputStream(SharpOutputStream(file.stream).buffered()).use { outZip ->
+            // add the database
+            ZipHelper.addFileToZip(
+                outZip,
+                BackupFileLocator.FILE_NAME_DB,
+                fileLocator.db.path,
+            )
+
+            // add the legacy vulnerable serialized preferences (will be removed in the future)
+            ZipHelper.addFileToZip(
+                outZip,
+                BackupFileLocator.FILE_NAME_SERIALIZED_PREFS
+            ) { byteOutput ->
+                ObjectOutputStream(byteOutput).use { output ->
+                    output.writeObject(preferences.all)
+                    output.flush()
+                }
+            }
+
+            // add the JSON preferences
+            ZipHelper.addFileToZip(
+                outZip,
+                BackupFileLocator.FILE_NAME_JSON_PREFS
+            ) { byteOutput ->
+                JsonWriter
+                    .indent("")
+                    .on(byteOutput)
+                    .`object`(preferences.all)
+                    .done()
+            }
+        }
+    }
+
+    /**
+     * Tries to create database directory if it does not exist.
+     *
+     * @return Whether the directory exists afterwards.
+     */
+    fun ensureDbDirectoryExists(): Boolean {
+        return fileLocator.dbDir.exists() || fileLocator.dbDir.mkdir()
+    }
+
+    /**
+     * Extracts the database from the given file to the app's database directory.
+     * The current app's database will be overwritten.
+     * @param file the .zip file to extract the database from
+     * @return true if the database was successfully extracted, false otherwise
+     */
+    fun extractDb(file: StoredFileHelper): Boolean {
+        val success = ZipHelper.extractFileFromZip(
+            file,
+            BackupFileLocator.FILE_NAME_DB,
+            fileLocator.db.path,
+        )
+
+        if (success) {
+            fileLocator.dbJournal.delete()
+            fileLocator.dbWal.delete()
+            fileLocator.dbShm.delete()
+        }
+
+        return success
+    }
+
+    @Deprecated(
+        "Serializing preferences with Java's ObjectOutputStream is vulnerable to injections",
+        replaceWith = ReplaceWith("exportHasJsonPrefs")
+    )
+    fun exportHasSerializedPrefs(zipFile: StoredFileHelper): Boolean {
+        return ZipHelper.zipContainsFile(zipFile, BackupFileLocator.FILE_NAME_SERIALIZED_PREFS)
+    }
+
+    fun exportHasJsonPrefs(zipFile: StoredFileHelper): Boolean {
+        return ZipHelper.zipContainsFile(zipFile, BackupFileLocator.FILE_NAME_JSON_PREFS)
+    }
+
+    /**
+     * Remove all shared preferences from the app and load the preferences supplied to the manager.
+     */
+    @Deprecated(
+        "Serializing preferences with Java's ObjectOutputStream is vulnerable to injections",
+        replaceWith = ReplaceWith("loadJsonPrefs")
+    )
+    @Throws(IOException::class, ClassNotFoundException::class)
+    fun loadSerializedPrefs(zipFile: StoredFileHelper, preferences: SharedPreferences) {
+        ZipHelper.extractFileFromZip(zipFile, BackupFileLocator.FILE_NAME_SERIALIZED_PREFS) {
+            PreferencesObjectInputStream(it).use { input ->
+                @Suppress("UNCHECKED_CAST")
+                val entries = input.readObject() as Map<String, *>
+
+                val editor = preferences.edit()
+                editor.clear()
+
+                for ((key, value) in entries) {
+                    when (value) {
+                        is Boolean -> editor.putBoolean(key, value)
+                        is Float -> editor.putFloat(key, value)
+                        is Int -> editor.putInt(key, value)
+                        is Long -> editor.putLong(key, value)
+                        is String -> editor.putString(key, value)
+                        is Set<*> -> {
+                            // There are currently only Sets with type String possible
+                            @Suppress("UNCHECKED_CAST")
+                            editor.putStringSet(key, value as Set<String>?)
+                        }
+                    }
+                }
+
+                if (!editor.commit()) {
+                    throw IOException("Unable to commit loadSerializedPrefs")
+                }
+            }
+        }.let { fileExists ->
+            if (!fileExists) {
+                throw FileNotFoundException(BackupFileLocator.FILE_NAME_SERIALIZED_PREFS)
+            }
+        }
+    }
+
+    /**
+     * Remove all shared preferences from the app and load the preferences supplied to the manager.
+     */
+    @Throws(IOException::class, JsonParserException::class)
+    fun loadJsonPrefs(zipFile: StoredFileHelper, preferences: SharedPreferences) {
+        ZipHelper.extractFileFromZip(zipFile, BackupFileLocator.FILE_NAME_JSON_PREFS) {
+            val jsonObject = JsonParser.`object`().from(it)
+
+            val editor = preferences.edit()
+            editor.clear()
+
+            for ((key, value) in jsonObject) {
+                when (value) {
+                    is Boolean -> editor.putBoolean(key, value)
+                    is Float -> editor.putFloat(key, value)
+                    is Int -> editor.putInt(key, value)
+                    is Long -> editor.putLong(key, value)
+                    is String -> editor.putString(key, value)
+                    is JsonArray -> {
+                        editor.putStringSet(key, value.mapNotNull { e -> e as? String }.toSet())
+                    }
+                }
+            }
+
+            if (!editor.commit()) {
+                throw IOException("Unable to commit loadJsonPrefs")
+            }
+        }.let { fileExists ->
+            if (!fileExists) {
+                throw FileNotFoundException(BackupFileLocator.FILE_NAME_JSON_PREFS)
+            }
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/export/PreferencesObjectInputStream.java

@@ -0,0 +1,58 @@
+package org.schabi.newpipe.settings.export;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectStreamClass;
+import java.util.Set;
+
+/**
+ * An {@link ObjectInputStream} that only allows preferences-related types to be deserialized, to
+ * prevent injections. The only allowed types are: all primitive types, all boxed primitive types,
+ * null, strings. HashMap, HashSet and arrays of previously defined types are also allowed. Sources:
+ * <a href="https://wiki.sei.cmu.edu/confluence/display/java/SER00-J.+Enable+serialization+compatibility+during+class+evolution">
+ * cmu.edu
+ * </a>,
+ * <a href="https://cheatsheetseries.owasp.org/cheatsheets/Deserialization_Cheat_Sheet.html#harden-your-own-javaioobjectinputstream">
+ * OWASP cheatsheet
+ * </a>,
+ * <a href="https://commons.apache.org/proper/commons-io/apidocs/src-html/org/apache/commons/io/serialization/ValidatingObjectInputStream.html#line-118">
+ * Apache's {@code ValidatingObjectInputStream}
+ * </a>
+ */
+public class PreferencesObjectInputStream extends ObjectInputStream {
+
+    /**
+     * Primitive types, strings and other built-in types do not pass through resolveClass() but
+     * instead have a custom encoding; see
+     * <a href="https://docs.oracle.com/javase/6/docs/platform/serialization/spec/protocol.html#10152">
+     * official docs</a>.
+     */
+    private static final Set<String> CLASS_WHITELIST = Set.of(
+            "java.lang.Boolean",
+            "java.lang.Byte",
+            "java.lang.Character",
+            "java.lang.Short",
+            "java.lang.Integer",
+            "java.lang.Long",
+            "java.lang.Float",
+            "java.lang.Double",
+            "java.lang.Void",
+            "java.util.HashMap",
+            "java.util.HashSet"
+    );
+
+    public PreferencesObjectInputStream(final InputStream in) throws IOException {
+        super(in);
+    }
+
+    @Override
+    protected Class<?> resolveClass(final ObjectStreamClass desc)
+            throws ClassNotFoundException, IOException {
+        if (CLASS_WHITELIST.contains(desc.getName())) {
+            return super.resolveClass(desc);
+        } else {
+            throw new ClassNotFoundException("Class not allowed: " + desc.getName());
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/streams/io/StoredDirectoryHelper.java

@@ -1,11 +1,18 @@
 package org.schabi.newpipe.streams.io;
 
+import static android.provider.DocumentsContract.Document.COLUMN_DISPLAY_NAME;
+import static android.provider.DocumentsContract.Root.COLUMN_DOCUMENT_ID;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.ParcelFileDescriptor;
 import android.provider.DocumentsContract;
+import android.system.Os;
+import android.system.StructStatVfs;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -15,6 +22,7 @@ import androidx.documentfile.provider.DocumentFile;
 import org.schabi.newpipe.settings.NewPipeSettings;
 import org.schabi.newpipe.util.FilePickerActivityHelper;
 
+import java.io.FileDescriptor;
 import java.io.IOException;
 import java.net.URI;
 import java.nio.file.Files;
@@ -26,10 +34,6 @@ import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-import static android.provider.DocumentsContract.Document.COLUMN_DISPLAY_NAME;
-import static android.provider.DocumentsContract.Root.COLUMN_DOCUMENT_ID;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
-
 public class StoredDirectoryHelper {
     private static final String TAG = StoredDirectoryHelper.class.getSimpleName();
     public static final int PERMISSION_FLAGS = Intent.FLAG_GRANT_READ_URI_PERMISSION
@@ -38,6 +42,10 @@ public class StoredDirectoryHelper {
     private Path ioTree;
     private DocumentFile docTree;
 
+    /**
+     * Context is `null` for non-SAF files, i.e. files that use `ioTree`.
+     */
+    @Nullable
     private Context context;
 
     private final String tag;
@@ -168,6 +176,46 @@ public class StoredDirectoryHelper {
         return docTree == null;
     }
 
+    /**
+     * Get free memory of the storage partition this file belongs to (root of the directory).
+     * See <a href="https://stackoverflow.com/q/31171838">StackOverflow</a> and
+     * <a href="https://pubs.opengroup.org/onlinepubs/9699919799/functions/fstatvfs.html">
+     *     {@code statvfs()} and {@code fstatvfs()} docs</a>
+     *
+     * @return amount of free memory in the volume of current directory (bytes), or {@link
+     * Long#MAX_VALUE} if an error occurred
+     */
+    public long getFreeStorageSpace() {
+        try {
+            final StructStatVfs stat;
+
+            if (ioTree != null) {
+                // non-SAF file, use statvfs with the path directly (also, `context` would be null
+                // for non-SAF files, so we wouldn't be able to call `getContentResolver` anyway)
+                stat = Os.statvfs(ioTree.toString());
+
+            } else {
+                // SAF file, we can't get a path directly, so obtain a file descriptor first
+                // and then use fstatvfs with the file descriptor
+                try (ParcelFileDescriptor parcelFileDescriptor =
+                             context.getContentResolver().openFileDescriptor(getUri(), "r")) {
+                    if (parcelFileDescriptor == null) {
+                        return Long.MAX_VALUE;
+                    }
+                    final FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
+                    stat = Os.fstatvfs(fileDescriptor);
+                }
+            }
+
+            // this is the same formula used inside the FsStat class
+            return stat.f_bavail * stat.f_frsize;
+        } catch (final Throwable e) {
+            // ignore any error
+            Log.e(TAG, "Could not get free storage space", e);
+            return Long.MAX_VALUE;
+        }
+    }
+
     /**
      * Only using Java I/O. Creates the directory named by this abstract pathname, including any
      * necessary but nonexistent parent directories.

app/src/main/java/org/schabi/newpipe/util/ExtractorHelper.java

@@ -27,6 +27,7 @@ import android.util.Log;
 import android.view.View;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.core.text.HtmlCompat;
 import androidx.preference.PreferenceManager;
@@ -113,14 +114,14 @@ public final class ExtractorHelper {
     public static Single<StreamInfo> getStreamInfo(final int serviceId, final String url,
                                                    final boolean forceLoad) {
         checkServiceId(serviceId);
-        return checkCache(forceLoad, serviceId, url, InfoItem.InfoType.STREAM,
+        return checkCache(forceLoad, serviceId, url, InfoCache.Type.STREAM,
                 Single.fromCallable(() -> StreamInfo.getInfo(NewPipe.getService(serviceId), url)));
     }
 
     public static Single<ChannelInfo> getChannelInfo(final int serviceId, final String url,
                                                      final boolean forceLoad) {
         checkServiceId(serviceId);
-        return checkCache(forceLoad, serviceId, url, InfoItem.InfoType.CHANNEL,
+        return checkCache(forceLoad, serviceId, url, InfoCache.Type.CHANNEL,
                 Single.fromCallable(() ->
                         ChannelInfo.getInfo(NewPipe.getService(serviceId), url)));
     }
@@ -130,7 +131,7 @@ public final class ExtractorHelper {
                                                        final boolean forceLoad) {
         checkServiceId(serviceId);
         return checkCache(forceLoad, serviceId,
-                listLinkHandler.getUrl(), InfoItem.InfoType.CHANNEL,
+                listLinkHandler.getUrl(), InfoCache.Type.CHANNEL_TAB,
                 Single.fromCallable(() ->
                         ChannelTabInfo.getInfo(NewPipe.getService(serviceId), listLinkHandler)));
     }
@@ -145,10 +146,11 @@ public final class ExtractorHelper {
                         listLinkHandler, nextPage));
     }
 
-    public static Single<CommentsInfo> getCommentsInfo(final int serviceId, final String url,
+    public static Single<CommentsInfo> getCommentsInfo(final int serviceId,
+                                                       final String url,
                                                        final boolean forceLoad) {
         checkServiceId(serviceId);
-        return checkCache(forceLoad, serviceId, url, InfoItem.InfoType.COMMENT,
+        return checkCache(forceLoad, serviceId, url, InfoCache.Type.COMMENTS,
                 Single.fromCallable(() ->
                         CommentsInfo.getInfo(NewPipe.getService(serviceId), url)));
     }
@@ -162,11 +164,20 @@ public final class ExtractorHelper {
                 CommentsInfo.getMoreItems(NewPipe.getService(serviceId), info, nextPage));
     }
 
+    public static Single<InfoItemsPage<CommentsInfoItem>> getMoreCommentItems(
+            final int serviceId,
+            final String url,
+            final Page nextPage) {
+        checkServiceId(serviceId);
+        return Single.fromCallable(() ->
+                CommentsInfo.getMoreItems(NewPipe.getService(serviceId), url, nextPage));
+    }
+
     public static Single<PlaylistInfo> getPlaylistInfo(final int serviceId,
                                                        final String url,
                                                        final boolean forceLoad) {
         checkServiceId(serviceId);
-        return checkCache(forceLoad, serviceId, url, InfoItem.InfoType.PLAYLIST,
+        return checkCache(forceLoad, serviceId, url, InfoCache.Type.PLAYLIST,
                 Single.fromCallable(() ->
                         PlaylistInfo.getInfo(NewPipe.getService(serviceId), url)));
     }
@@ -179,9 +190,10 @@ public final class ExtractorHelper {
                 PlaylistInfo.getMoreItems(NewPipe.getService(serviceId), url, nextPage));
     }
 
-    public static Single<KioskInfo> getKioskInfo(final int serviceId, final String url,
+    public static Single<KioskInfo> getKioskInfo(final int serviceId,
+                                                 final String url,
                                                  final boolean forceLoad) {
-        return checkCache(forceLoad, serviceId, url, InfoItem.InfoType.PLAYLIST,
+        return checkCache(forceLoad, serviceId, url, InfoCache.Type.KIOSK,
                 Single.fromCallable(() -> KioskInfo.getInfo(NewPipe.getService(serviceId), url)));
     }
 
@@ -193,7 +205,7 @@ public final class ExtractorHelper {
     }
 
     /*//////////////////////////////////////////////////////////////////////////
-    // Utils
+    // Cache
     //////////////////////////////////////////////////////////////////////////*/
 
     /**
@@ -205,24 +217,25 @@ public final class ExtractorHelper {
      * @param forceLoad       whether to force loading from the network instead of from the cache
      * @param serviceId       the service to load from
      * @param url             the URL to load
-     * @param infoType        the {@link InfoItem.InfoType} of the item
+     * @param cacheType       the {@link InfoCache.Type} of the item
      * @param loadFromNetwork the {@link Single} to load the item from the network
      * @return a {@link Single} that loads the item
      */
     private static <I extends Info> Single<I> checkCache(final boolean forceLoad,
-                                                         final int serviceId, final String url,
-                                                         final InfoItem.InfoType infoType,
-                                                         final Single<I> loadFromNetwork) {
+                                                         final int serviceId,
+                                                         @NonNull final String url,
+                                                         @NonNull final InfoCache.Type cacheType,
+                                                         @NonNull final Single<I> loadFromNetwork) {
         checkServiceId(serviceId);
         final Single<I> actualLoadFromNetwork = loadFromNetwork
-                .doOnSuccess(info -> CACHE.putInfo(serviceId, url, info, infoType));
+                .doOnSuccess(info -> CACHE.putInfo(serviceId, url, info, cacheType));
 
         final Single<I> load;
         if (forceLoad) {
-            CACHE.removeInfo(serviceId, url, infoType);
+            CACHE.removeInfo(serviceId, url, cacheType);
             load = actualLoadFromNetwork;
         } else {
-            load = Maybe.concat(ExtractorHelper.loadFromCache(serviceId, url, infoType),
+            load = Maybe.concat(ExtractorHelper.loadFromCache(serviceId, url, cacheType),
                             actualLoadFromNetwork.toMaybe())
                     .firstElement() // Take the first valid
                     .toSingle();
@@ -237,15 +250,17 @@ public final class ExtractorHelper {
      * @param <I>       the item type's class that extends {@link Info}
      * @param serviceId the service to load from
      * @param url       the URL to load
-     * @param infoType  the {@link InfoItem.InfoType} of the item
+     * @param cacheType the {@link InfoCache.Type} of the item
      * @return a {@link Single} that loads the item
      */
-    private static <I extends Info> Maybe<I> loadFromCache(final int serviceId, final String url,
-                                                           final InfoItem.InfoType infoType) {
+    private static <I extends Info> Maybe<I> loadFromCache(
+            final int serviceId,
+            @NonNull final String url,
+            @NonNull final InfoCache.Type cacheType) {
         checkServiceId(serviceId);
         return Maybe.defer(() -> {
             //noinspection unchecked
-            final I info = (I) CACHE.getFromKey(serviceId, url, infoType);
+            final I info = (I) CACHE.getFromKey(serviceId, url, cacheType);
             if (MainActivity.DEBUG) {
                 Log.d(TAG, "loadFromCache() called, info > " + info);
             }
@@ -259,11 +274,17 @@ public final class ExtractorHelper {
         });
     }
 
-    public static boolean isCached(final int serviceId, final String url,
-                                   final InfoItem.InfoType infoType) {
-        return null != loadFromCache(serviceId, url, infoType).blockingGet();
+    public static boolean isCached(final int serviceId,
+                                   @NonNull final String url,
+                                   @NonNull final InfoCache.Type cacheType) {
+        return null != loadFromCache(serviceId, url, cacheType).blockingGet();
     }
 
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // Utils
+    //////////////////////////////////////////////////////////////////////////*/
+
     /**
      * Formats the text contained in the meta info list as HTML and puts it into the text view,
      * while also making the separator visible. If the list is null or empty, or the user chose not

app/src/main/java/org/schabi/newpipe/util/InfoCache.java

@@ -27,7 +27,6 @@ import androidx.collection.LruCache;
 
 import org.schabi.newpipe.MainActivity;
 import org.schabi.newpipe.extractor.Info;
-import org.schabi.newpipe.extractor.InfoItem;
 
 import java.util.Map;
 
@@ -48,14 +47,27 @@ public final class InfoCache {
         // no instance
     }
 
+    /**
+     * Identifies the type of {@link Info} to put into the cache.
+     */
+    public enum Type {
+        STREAM,
+        CHANNEL,
+        CHANNEL_TAB,
+        COMMENTS,
+        PLAYLIST,
+        KIOSK,
+    }
+
     public static InfoCache getInstance() {
         return INSTANCE;
     }
 
     @NonNull
-    private static String keyOf(final int serviceId, @NonNull final String url,
-                                @NonNull final InfoItem.InfoType infoType) {
-        return serviceId + url + infoType.toString();
+    private static String keyOf(final int serviceId,
+                                @NonNull final String url,
+                                @NonNull final Type cacheType) {
+        return serviceId + ":" + cacheType.ordinal() + ":" + url;
     }
 
     private static void removeStaleCache() {
@@ -83,19 +95,22 @@ public final class InfoCache {
     }
 
     @Nullable
-    public Info getFromKey(final int serviceId, @NonNull final String url,
-                           @NonNull final InfoItem.InfoType infoType) {
+    public Info getFromKey(final int serviceId,
+                           @NonNull final String url,
+                           @NonNull final Type cacheType) {
         if (DEBUG) {
             Log.d(TAG, "getFromKey() called with: "
                     + "serviceId = [" + serviceId + "], url = [" + url + "]");
         }
         synchronized (LRU_CACHE) {
-            return getInfo(keyOf(serviceId, url, infoType));
+            return getInfo(keyOf(serviceId, url, cacheType));
         }
     }
 
-    public void putInfo(final int serviceId, @NonNull final String url, @NonNull final Info info,
-                        @NonNull final InfoItem.InfoType infoType) {
+    public void putInfo(final int serviceId,
+                        @NonNull final String url,
+                        @NonNull final Info info,
+                        @NonNull final Type cacheType) {
         if (DEBUG) {
             Log.d(TAG, "putInfo() called with: info = [" + info + "]");
         }
@@ -103,18 +118,19 @@ public final class InfoCache {
         final long expirationMillis = ServiceHelper.getCacheExpirationMillis(info.getServiceId());
         synchronized (LRU_CACHE) {
             final CacheData data = new CacheData(info, expirationMillis);
-            LRU_CACHE.put(keyOf(serviceId, url, infoType), data);
+            LRU_CACHE.put(keyOf(serviceId, url, cacheType), data);
         }
     }
 
-    public void removeInfo(final int serviceId, @NonNull final String url,
-                           @NonNull final InfoItem.InfoType infoType) {
+    public void removeInfo(final int serviceId,
+                           @NonNull final String url,
+                           @NonNull final Type cacheType) {
         if (DEBUG) {
             Log.d(TAG, "removeInfo() called with: "
                     + "serviceId = [" + serviceId + "], url = [" + url + "]");
         }
         synchronized (LRU_CACHE) {
-            LRU_CACHE.remove(keyOf(serviceId, url, infoType));
+            LRU_CACHE.remove(keyOf(serviceId, url, cacheType));
         }
     }
 

app/src/main/java/org/schabi/newpipe/util/ListHelper.java

@@ -643,6 +643,7 @@ public final class ListHelper {
                 context.getString(R.string.best_resolution_key), defaultFormat, videoStreams);
     }
 
+    @Nullable
     private static MediaFormat getDefaultFormat(@NonNull final Context context,
                                                 @StringRes final int defaultFormatKey,
                                                 @StringRes final int defaultFormatValueKey) {
@@ -651,18 +652,14 @@ public final class ListHelper {
 
         final String defaultFormat = context.getString(defaultFormatValueKey);
         final String defaultFormatString = preferences.getString(
-                context.getString(defaultFormatKey), defaultFormat);
+                context.getString(defaultFormatKey),
+                defaultFormat
+        );
 
-        MediaFormat defaultMediaFormat = getMediaFormatFromKey(context, defaultFormatString);
-        if (defaultMediaFormat == null) {
-            preferences.edit().putString(context.getString(defaultFormatKey), defaultFormat)
-                    .apply();
-            defaultMediaFormat = getMediaFormatFromKey(context, defaultFormat);
-        }
-
-        return defaultMediaFormat;
+        return getMediaFormatFromKey(context, defaultFormatString);
     }
 
+    @Nullable
     private static MediaFormat getMediaFormatFromKey(@NonNull final Context context,
                                                      @NonNull final String formatKey) {
         MediaFormat format = null;
@@ -877,6 +874,7 @@ public final class ListHelper {
 
         return Comparator.comparing(AudioStream::getAudioLocale, Comparator.nullsLast(
                         Comparator.comparing(locale -> locale.getDisplayName(appLoc))))
-                .thenComparing(AudioStream::getAudioTrackType);
+                .thenComparing(AudioStream::getAudioTrackType, Comparator.nullsLast(
+                        Comparator.naturalOrder()));
     }
 }

app/src/main/java/org/schabi/newpipe/util/Localization.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe.util;
 
+import static org.schabi.newpipe.MainActivity.DEBUG;
+
 import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.SharedPreferences;
@@ -22,6 +24,7 @@ import org.ocpsoft.prettytime.units.Decade;
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.localization.ContentCountry;
+import org.schabi.newpipe.extractor.localization.DateWrapper;
 import org.schabi.newpipe.extractor.stream.AudioStream;
 import org.schabi.newpipe.extractor.stream.AudioTrackType;
 
@@ -82,7 +85,7 @@ public final class Localization {
                 .fromLocale(getPreferredLocale(context));
     }
 
-    public static ContentCountry getPreferredContentCountry(final Context context) {
+    public static ContentCountry getPreferredContentCountry(@NonNull final Context context) {
         final String contentCountry = PreferenceManager.getDefaultSharedPreferences(context)
                 .getString(context.getString(R.string.content_country_key),
                         context.getString(R.string.default_localization_key));
@@ -92,41 +95,43 @@ public final class Localization {
         return new ContentCountry(contentCountry);
     }
 
-    public static Locale getPreferredLocale(final Context context) {
+    public static Locale getPreferredLocale(@NonNull final Context context) {
         return getLocaleFromPrefs(context, R.string.content_language_key);
     }
 
-    public static Locale getAppLocale(final Context context) {
+    public static Locale getAppLocale(@NonNull final Context context) {
         return getLocaleFromPrefs(context, R.string.app_language_key);
     }
 
-    public static String localizeNumber(final Context context, final long number) {
+    public static String localizeNumber(@NonNull final Context context, final long number) {
         return localizeNumber(context, (double) number);
     }
 
-    public static String localizeNumber(final Context context, final double number) {
+    public static String localizeNumber(@NonNull final Context context, final double number) {
         final NumberFormat nf = NumberFormat.getInstance(getAppLocale(context));
         return nf.format(number);
     }
 
-    public static String formatDate(final OffsetDateTime offsetDateTime, final Context context) {
+    public static String formatDate(@NonNull final Context context,
+                                    @NonNull final OffsetDateTime offsetDateTime) {
         return DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM)
                 .withLocale(getAppLocale(context)).format(offsetDateTime
                         .atZoneSameInstant(ZoneId.systemDefault()));
     }
 
     @SuppressLint("StringFormatInvalid")
-    public static String localizeUploadDate(final Context context,
-                                            final OffsetDateTime offsetDateTime) {
-        return context.getString(R.string.upload_date_text, formatDate(offsetDateTime, context));
+    public static String localizeUploadDate(@NonNull final Context context,
+                                            @NonNull final OffsetDateTime offsetDateTime) {
+        return context.getString(R.string.upload_date_text, formatDate(context, offsetDateTime));
     }
 
-    public static String localizeViewCount(final Context context, final long viewCount) {
+    public static String localizeViewCount(@NonNull final Context context, final long viewCount) {
         return getQuantity(context, R.plurals.views, R.string.no_views, viewCount,
                 localizeNumber(context, viewCount));
     }
 
-    public static String localizeStreamCount(final Context context, final long streamCount) {
+    public static String localizeStreamCount(@NonNull final Context context,
+                                             final long streamCount) {
         switch ((int) streamCount) {
             case (int) ListExtractor.ITEM_COUNT_UNKNOWN:
                 return "";
@@ -140,7 +145,8 @@ public final class Localization {
         }
     }
 
-    public static String localizeStreamCountMini(final Context context, final long streamCount) {
+    public static String localizeStreamCountMini(@NonNull final Context context,
+                                                 final long streamCount) {
         switch ((int) streamCount) {
             case (int) ListExtractor.ITEM_COUNT_UNKNOWN:
                 return "";
@@ -153,12 +159,13 @@ public final class Localization {
         }
     }
 
-    public static String localizeWatchingCount(final Context context, final long watchingCount) {
+    public static String localizeWatchingCount(@NonNull final Context context,
+                                               final long watchingCount) {
         return getQuantity(context, R.plurals.watching, R.string.no_one_watching, watchingCount,
                 localizeNumber(context, watchingCount));
     }
 
-    public static String shortCount(final Context context, final long count) {
+    public static String shortCount(@NonNull final Context context, final long count) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
             return CompactDecimalFormat.getInstance(getAppLocale(context),
                     CompactDecimalFormat.CompactStyle.SHORT).format(count);
@@ -179,37 +186,79 @@ public final class Localization {
         }
     }
 
-    public static String listeningCount(final Context context, final long listeningCount) {
+    public static String listeningCount(@NonNull final Context context, final long listeningCount) {
         return getQuantity(context, R.plurals.listening, R.string.no_one_listening, listeningCount,
                 shortCount(context, listeningCount));
     }
 
-    public static String shortWatchingCount(final Context context, final long watchingCount) {
+    public static String shortWatchingCount(@NonNull final Context context,
+                                            final long watchingCount) {
         return getQuantity(context, R.plurals.watching, R.string.no_one_watching, watchingCount,
                 shortCount(context, watchingCount));
     }
 
-    public static String shortViewCount(final Context context, final long viewCount) {
+    public static String shortViewCount(@NonNull final Context context, final long viewCount) {
         return getQuantity(context, R.plurals.views, R.string.no_views, viewCount,
                 shortCount(context, viewCount));
     }
 
-    public static String shortSubscriberCount(final Context context, final long subscriberCount) {
+    public static String shortSubscriberCount(@NonNull final Context context,
+                                              final long subscriberCount) {
         return getQuantity(context, R.plurals.subscribers, R.string.no_subscribers, subscriberCount,
                 shortCount(context, subscriberCount));
     }
 
-    public static String downloadCount(final Context context, final int downloadCount) {
+    public static String downloadCount(@NonNull final Context context, final int downloadCount) {
         return getQuantity(context, R.plurals.download_finished_notification, 0,
                 downloadCount, shortCount(context, downloadCount));
     }
 
-    public static String deletedDownloadCount(final Context context, final int deletedCount) {
+    public static String deletedDownloadCount(@NonNull final Context context,
+                                              final int deletedCount) {
         return getQuantity(context, R.plurals.deleted_downloads_toast, 0,
                 deletedCount, shortCount(context, deletedCount));
     }
 
+    public static String replyCount(@NonNull final Context context, final int replyCount) {
+        return getQuantity(context, R.plurals.replies, 0, replyCount,
+                String.valueOf(replyCount));
+    }
+
+    /**
+     * @param context the Android context
+     * @param likeCount the like count, possibly negative if unknown
+     * @return if {@code likeCount} is smaller than {@code 0}, the string {@code "-"}, otherwise
+     *         the result of calling {@link #shortCount(Context, long)} on the like count
+     */
+    public static String likeCount(@NonNull final Context context, final int likeCount) {
+        if (likeCount < 0) {
+            return "-";
+        } else {
+            return shortCount(context, likeCount);
+        }
+    }
+
+    /**
+     * Get a readable text for a duration in the format {@code days:hours:minutes:seconds}.
+     * Prepended zeros are removed.
+     * @param duration the duration in seconds
+     * @return a formatted duration String or {@code 0:00} if the duration is zero.
+     */
     public static String getDurationString(final long duration) {
+        return getDurationString(duration, true, false);
+    }
+
+    /**
+     * Get a readable text for a duration in the format {@code days:hours:minutes:seconds+}.
+     * Prepended zeros are removed. If the given duration is incomplete, a plus is appended to the
+     * duration string.
+     * @param duration the duration in seconds
+     * @param isDurationComplete whether the given duration is complete or whether info is missing
+     * @param showDurationPrefix whether the duration-prefix shall be shown
+     * @return a formatted duration String or {@code 0:00} if the duration is zero.
+     */
+    public static String getDurationString(final long duration, final boolean isDurationComplete,
+                                           final boolean showDurationPrefix) {
         final String output;
 
         final long days = duration / (24 * 60 * 60L); /* greater than a day */
@@ -227,7 +276,9 @@ public final class Localization {
         } else {
             output = String.format(Locale.US, "%d:%02d", minutes, seconds);
         }
-        return output;
+        final String durationPrefix = showDurationPrefix ? "⏱ " : "";
+        final String durationPostfix = isDurationComplete ? "" : "+";
+        return durationPrefix + output + durationPostfix;
     }
 
     /**
@@ -241,7 +292,8 @@ public final class Localization {
      * @return duration in a human readable string.
      */
     @NonNull
-    public static String localizeDuration(final Context context, final int durationInSecs) {
+    public static String localizeDuration(@NonNull final Context context,
+                                          final int durationInSecs) {
         if (durationInSecs < 0) {
             throw new IllegalArgumentException("duration can not be negative");
         }
@@ -278,7 +330,7 @@ public final class Localization {
      * @param track   an {@link AudioStream} of the track
      * @return the localized name of the audio track
      */
-    public static String audioTrackName(final Context context, final AudioStream track) {
+    public static String audioTrackName(@NonNull final Context context, final AudioStream track) {
         final String name;
         if (track.getAudioLocale() != null) {
             name = track.getAudioLocale().getDisplayLanguage(getAppLocale(context));
@@ -298,7 +350,8 @@ public final class Localization {
     }
 
     @Nullable
-    private static String audioTrackType(final Context context, final AudioTrackType trackType) {
+    private static String audioTrackType(@NonNull final Context context,
+                                         final AudioTrackType trackType) {
         switch (trackType) {
             case ORIGINAL:
                 return context.getString(R.string.audio_track_type_original);
@@ -314,20 +367,45 @@ public final class Localization {
     // Pretty Time
     //////////////////////////////////////////////////////////////////////////*/
 
-    public static void initPrettyTime(final PrettyTime time) {
+    public static void initPrettyTime(@NonNull final PrettyTime time) {
         prettyTime = time;
         // Do not use decades as YouTube doesn't either.
         prettyTime.removeUnit(Decade.class);
     }
 
-    public static PrettyTime resolvePrettyTime(final Context context) {
+    public static PrettyTime resolvePrettyTime(@NonNull final Context context) {
         return new PrettyTime(getAppLocale(context));
     }
 
-    public static String relativeTime(final OffsetDateTime offsetDateTime) {
+    public static String relativeTime(@NonNull final OffsetDateTime offsetDateTime) {
         return prettyTime.formatUnrounded(offsetDateTime);
     }
 
+    /**
+     * @param context the Android context; if {@code null} then even if in debug mode and the
+     *                setting is enabled, {@code textual} will not be shown next to {@code parsed}
+     * @param parsed  the textual date or time ago parsed by NewPipeExtractor, or {@code null} if
+     *                the extractor could not parse it
+     * @param textual the original textual date or time ago string as provided by services
+     * @return {@link #relativeTime(OffsetDateTime)} is used if {@code parsed != null}, otherwise
+     *         {@code textual} is returned. If in debug mode, {@code context != null},
+     *         {@code parsed != null} and the relevant setting is enabled, {@code textual} will
+     *         be appended to the returned string for debugging purposes.
+     */
+    public static String relativeTimeOrTextual(@Nullable final Context context,
+                                               @Nullable final DateWrapper parsed,
+                                               final String textual) {
+        if (parsed == null) {
+            return textual;
+        } else if (DEBUG && context != null && PreferenceManager
+                .getDefaultSharedPreferences(context)
+                .getBoolean(context.getString(R.string.show_original_time_ago_key), false)) {
+            return relativeTime(parsed.offsetDateTime()) + " (" + textual + ")";
+        } else {
+            return relativeTime(parsed.offsetDateTime());
+        }
+    }
+
     public static void assureCorrectAppLanguage(final Context c) {
         final Resources res = c.getResources();
         final DisplayMetrics dm = res.getDisplayMetrics();
@@ -336,7 +414,8 @@ public final class Localization {
         res.updateConfiguration(conf, dm);
     }
 
-    private static Locale getLocaleFromPrefs(final Context context, @StringRes final int prefKey) {
+    private static Locale getLocaleFromPrefs(@NonNull final Context context,
+                                             @StringRes final int prefKey) {
         final SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
         final String defaultKey = context.getString(R.string.default_localization_key);
         final String languageCode = sp.getString(context.getString(prefKey), defaultKey);
@@ -352,8 +431,10 @@ public final class Localization {
         return new BigDecimal(value).setScale(1, RoundingMode.HALF_UP).doubleValue();
     }
 
-    private static String getQuantity(final Context context, @PluralsRes final int pluralId,
-                                      @StringRes final int zeroCaseStringId, final long count,
+    private static String getQuantity(@NonNull final Context context,
+                                      @PluralsRes final int pluralId,
+                                      @StringRes final int zeroCaseStringId,
+                                      final long count,
                                       final String formattedCount) {
         if (count == 0) {
             return context.getString(zeroCaseStringId);

app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java

@@ -1,5 +1,6 @@
 package org.schabi.newpipe.util;
 
+import static android.text.TextUtils.isEmpty;
 import static org.schabi.newpipe.util.ListHelper.getUrlAndNonTorrentStreams;
 
 import android.annotation.SuppressLint;
@@ -17,6 +18,7 @@ import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.content.ContextCompat;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentTransaction;
 
@@ -29,8 +31,10 @@ import org.schabi.newpipe.RouterActivity;
 import org.schabi.newpipe.about.AboutActivity;
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity;
 import org.schabi.newpipe.download.DownloadActivity;
+import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.stream.AudioStream;
 import org.schabi.newpipe.extractor.stream.DeliveryMethod;
@@ -41,6 +45,7 @@ import org.schabi.newpipe.extractor.stream.VideoStream;
 import org.schabi.newpipe.fragments.MainFragment;
 import org.schabi.newpipe.fragments.detail.VideoDetailFragment;
 import org.schabi.newpipe.fragments.list.channel.ChannelFragment;
+import org.schabi.newpipe.fragments.list.comments.CommentRepliesFragment;
 import org.schabi.newpipe.fragments.list.kiosk.KioskFragment;
 import org.schabi.newpipe.fragments.list.playlist.PlaylistFragment;
 import org.schabi.newpipe.fragments.list.search.SearchFragment;
@@ -476,6 +481,35 @@ public final class NavigationHelper {
                 item.getServiceId(), uploaderUrl, item.getUploaderName());
     }
 
+    /**
+     * Opens the comment author channel fragment, if the {@link CommentsInfoItem#getUploaderUrl()}
+     * of {@code comment} is non-null. Shows a UI-error snackbar if something goes wrong.
+     *
+     * @param activity the activity with the fragment manager and in which to show the snackbar
+     * @param comment the comment whose uploader/author will be opened
+     */
+    public static void openCommentAuthorIfPresent(@NonNull final FragmentActivity activity,
+                                                  @NonNull final CommentsInfoItem comment) {
+        if (isEmpty(comment.getUploaderUrl())) {
+            return;
+        }
+        try {
+            openChannelFragment(activity.getSupportFragmentManager(), comment.getServiceId(),
+                    comment.getUploaderUrl(), comment.getUploaderName());
+        } catch (final Exception e) {
+            ErrorUtil.showUiErrorSnackbar(activity, "Opening channel fragment", e);
+        }
+    }
+
+    public static void openCommentRepliesFragment(@NonNull final FragmentActivity activity,
+                                                  @NonNull final CommentsInfoItem comment) {
+        defaultTransaction(activity.getSupportFragmentManager())
+                .replace(R.id.fragment_holder, new CommentRepliesFragment(comment),
+                        CommentRepliesFragment.TAG)
+                .addToBackStack(CommentRepliesFragment.TAG)
+                .commit();
+    }
+
     public static void openPlaylistFragment(final FragmentManager fragmentManager,
                                             final int serviceId, final String url,
                                             @NonNull final String name) {