Refactoring + deduplicated code

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

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.download;
 
 import android.app.Activity;
-import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -54,7 +53,7 @@ import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.extractor.stream.SubtitlesStream;
 import org.schabi.newpipe.extractor.stream.VideoStream;
 import org.schabi.newpipe.settings.NewPipeSettings;
-import org.schabi.newpipe.streams.io.NoFileManagerHelper;
+import org.schabi.newpipe.streams.io.NoFileManagerSafeGuard;
 import org.schabi.newpipe.streams.io.StoredDirectoryHelper;
 import org.schabi.newpipe.streams.io.StoredFileHelper;
 import org.schabi.newpipe.util.FilePickerActivityHelper;
@@ -689,12 +688,12 @@ public class DownloadDialog extends DialogFragment
     }
 
     private void launchDirectoryPicker(final ActivityResultLauncher<Intent> launcher) {
-        try {
-            launcher.launch(StoredDirectoryHelper.getPicker(context));
-        } catch (final ActivityNotFoundException aex) {
-            Log.w(TAG, "Unable to launch directory picker", aex);
-            NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-        }
+        NoFileManagerSafeGuard.launchSafe(
+                launcher,
+                StoredDirectoryHelper.getPicker(context),
+                TAG,
+                context
+        );
     }
 
     private void prepareSelectedDownload() {
@@ -773,13 +772,12 @@ public class DownloadDialog extends DialogFragment
                 initialPath = Uri.parse(initialSavePath.getAbsolutePath());
             }
 
-            try {
-                requestDownloadSaveAsLauncher.launch(StoredFileHelper.getNewPicker(context,
-                        filenameTmp, mimeTmp, initialPath));
-            } catch (final ActivityNotFoundException aex) {
-                Log.w(TAG, "Unable to launch file picker", aex);
-                NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-            }
+            NoFileManagerSafeGuard.launchSafe(
+                    requestDownloadSaveAsLauncher,
+                    StoredFileHelper.getNewPicker(context, filenameTmp, mimeTmp, initialPath),
+                    TAG,
+                    context
+            );
 
             return;
         }

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

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.local.subscription
 
 import android.app.Activity
-import android.content.ActivityNotFoundException
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.DialogInterface
@@ -9,7 +8,6 @@ import android.content.Intent
 import android.content.IntentFilter
 import android.os.Bundle
 import android.os.Parcelable
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuInflater
@@ -57,7 +55,7 @@ import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService
 import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService.KEY_MODE
 import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService.KEY_VALUE
 import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService.PREVIOUS_EXPORT_MODE
-import org.schabi.newpipe.streams.io.NoFileManagerHelper
+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.OnClickGesture
@@ -182,26 +180,24 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
     }
 
     private fun onImportPreviousSelected() {
-        try {
-            requestImportLauncher.launch(StoredFileHelper.getPicker(activity, JSON_MIME_TYPE))
-        } catch (aex: ActivityNotFoundException) {
-            Log.w(TAG, "Unable to launch file picker", aex)
-            NoFileManagerHelper.showActivityNotFoundAlert(context)
-        }
+        NoFileManagerSafeGuard.launchSafe(
+            requestImportLauncher,
+            StoredFileHelper.getPicker(activity, JSON_MIME_TYPE),
+            TAG,
+            requireContext()
+        )
     }
 
     private fun onExportSelected() {
         val date = SimpleDateFormat("yyyyMMddHHmm", Locale.ENGLISH).format(Date())
         val exportName = "newpipe_subscriptions_$date.json"
 
-        try {
-            requestExportLauncher.launch(
-                StoredFileHelper.getNewPicker(activity, exportName, JSON_MIME_TYPE, null)
-            )
-        } catch (aex: ActivityNotFoundException) {
-            Log.w(TAG, "Unable to launch file picker", aex)
-            NoFileManagerHelper.showActivityNotFoundAlert(context)
-        }
+        NoFileManagerSafeGuard.launchSafe(
+            requestExportLauncher,
+            StoredFileHelper.getNewPicker(activity, exportName, JSON_MIME_TYPE, null),
+            TAG,
+            requireContext()
+        )
     }
 
     private fun openReorderDialog() {

app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionsImportFragment.java

@@ -1,12 +1,10 @@
 package org.schabi.newpipe.local.subscription;
 
 import android.app.Activity;
-import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.text.util.Linkify;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -32,7 +30,7 @@ import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
 import org.schabi.newpipe.local.subscription.services.SubscriptionsImportService;
-import org.schabi.newpipe.streams.io.NoFileManagerHelper;
+import org.schabi.newpipe.streams.io.NoFileManagerSafeGuard;
 import org.schabi.newpipe.streams.io.StoredFileHelper;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.ServiceHelper;
@@ -178,14 +176,14 @@ public class SubscriptionsImportFragment extends BaseFragment {
     }
 
     public void onImportFile() {
-        try {
-            // leave */* mime type to support all services
-            // with different mime types and file extensions
-            requestImportFileLauncher.launch(StoredFileHelper.getPicker(activity, "*/*"));
-        } catch (final ActivityNotFoundException aex) {
-            Log.w(TAG, "Unable to launch file picker", aex);
-            NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-        }
+        NoFileManagerSafeGuard.launchSafe(
+                requestImportFileLauncher,
+                // leave */* mime type to support all services
+                // with different mime types and file extensions
+                StoredFileHelper.getPicker(activity, "*/*"),
+                TAG,
+                getContext()
+        );
     }
 
     private void requestImportFileResult(final ActivityResult result) {

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

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.settings;
 
 import android.app.Activity;
-import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -26,7 +25,7 @@ import org.schabi.newpipe.error.ReCaptchaActivity;
 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.NoFileManagerHelper;
+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.PicassoHelper;
@@ -75,29 +74,28 @@ public class ContentSettingsFragment extends BasePreferenceFragment {
 
         final Preference importDataPreference = requirePreference(R.string.import_data);
         importDataPreference.setOnPreferenceClickListener((Preference p) -> {
-            try {
-                requestImportPathLauncher.launch(
-                        StoredFileHelper.getPicker(requireContext(),
-                                ZIP_MIME_TYPE, getImportExportDataUri()));
-            } catch (final ActivityNotFoundException aex) {
-                Log.w(TAG, "Unable to launch file picker", aex);
-                NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-            }
+            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()
+            );
 
-            try {
-                requestExportPathLauncher.launch(
-                        StoredFileHelper.getNewPicker(requireContext(),
-                                "NewPipeData-" + exportDateFormat.format(new Date()) + ".zip",
-                                ZIP_MIME_TYPE, getImportExportDataUri()));
-            } catch (final ActivityNotFoundException aex) {
-                Log.w(TAG, "Unable to launch file picker", aex);
-                NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-            }
             return true;
         });
 

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

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.settings;
 
 import android.app.Activity;
-import android.content.ActivityNotFoundException;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
@@ -22,7 +21,7 @@ import androidx.preference.SwitchPreferenceCompat;
 import com.nononsenseapps.filepicker.Utils;
 
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.streams.io.NoFileManagerHelper;
+import org.schabi.newpipe.streams.io.NoFileManagerSafeGuard;
 import org.schabi.newpipe.streams.io.StoredDirectoryHelper;
 import org.schabi.newpipe.util.FilePickerActivityHelper;
 
@@ -216,12 +215,12 @@ public class DownloadSettingsFragment extends BasePreferenceFragment {
     }
 
     private void launchDirectoryPicker(final ActivityResultLauncher<Intent> launcher) {
-        try {
-            launcher.launch(StoredDirectoryHelper.getPicker(ctx));
-        } catch (final ActivityNotFoundException aex) {
-            Log.w(TAG, "Unable to launch directory picker", aex);
-            NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-        }
+        NoFileManagerSafeGuard.launchSafe(
+                launcher,
+                StoredDirectoryHelper.getPicker(ctx),
+                TAG,
+                ctx
+        );
     }
 
     private void requestDownloadVideoPathResult(final ActivityResult result) {

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

@@ -1,31 +0,0 @@
-package org.schabi.newpipe.streams.io;
-
-import android.content.Context;
-
-import androidx.appcompat.app.AlertDialog;
-
-import org.schabi.newpipe.R;
-
-/**
- * Helper for when no file-manager/activity was found.
- */
-public final class NoFileManagerHelper {
-    private NoFileManagerHelper() {
-        // No impl
-    }
-
-    /**
-     * Shows an alert dialog when no file-manager is found.
-     * @param context Context
-     */
-    public static void showActivityNotFoundAlert(final Context context) {
-        new AlertDialog.Builder(context)
-                .setTitle(R.string.no_app_to_open_intent)
-                .setMessage(
-                        context.getString(
-                                R.string.no_appropriate_file_manager_message,
-                                context.getString(R.string.downloads_storage_use_saf_title)))
-                .setPositiveButton(R.string.ok, null)
-                .show();
-    }
-}

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

@@ -0,0 +1,67 @@
+package org.schabi.newpipe.streams.io;
+
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.util.Log;
+
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
+
+import org.schabi.newpipe.R;
+
+/**
+ * Helper for when no file-manager/activity was found.
+ */
+public final class NoFileManagerSafeGuard {
+    private NoFileManagerSafeGuard() {
+        // No impl
+    }
+
+    /**
+     * Shows an alert dialog when no file-manager is found.
+     * @param context Context
+     */
+    private static void showActivityNotFoundAlert(@NonNull final Context context) {
+        if (context == null) {
+            throw new IllegalArgumentException(
+                    "Unable to open no file manager alert dialog: Context is null");
+        }
+
+        new AlertDialog.Builder(context)
+                .setTitle(R.string.no_app_to_open_intent)
+                .setMessage(
+                        context.getString(
+                                R.string.no_appropriate_file_manager_message,
+                                context.getString(R.string.downloads_storage_use_saf_title)))
+                .setPositiveButton(R.string.ok, null)
+                .show();
+    }
+
+    /**
+     * Launches the file manager safely.
+     *
+     * If no file manager is found (which is normally only the case when the user uninstalled
+     * the default file manager or the OS lacks one) an alert dialog shows up, asking the user
+     * to fix the situation.
+     *
+     * @param activityResultLauncher see {@link ActivityResultLauncher#launch(Object)}
+     * @param input see {@link ActivityResultLauncher#launch(Object)}
+     * @param tag Tag used for logging
+     * @param context Context
+     * @param <I> see {@link ActivityResultLauncher#launch(Object)}
+     */
+    public static <I> void launchSafe(
+            final ActivityResultLauncher<I> activityResultLauncher,
+            final I input,
+            @NonNull final String tag,
+            @NonNull final Context context
+    ) {
+        try {
+            activityResultLauncher.launch(input);
+        } catch (final ActivityNotFoundException aex) {
+            Log.w(tag, "Unable to launch file/directory picker", aex);
+            NoFileManagerSafeGuard.showActivityNotFoundAlert(context);
+        }
+    }
+}

app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java

@@ -1,7 +1,6 @@
 package us.shandian.giga.ui.fragment;
 
 import android.app.Activity;
-import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
@@ -11,7 +10,6 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.IBinder;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -34,7 +32,7 @@ import com.nononsenseapps.filepicker.Utils;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.settings.NewPipeSettings;
-import org.schabi.newpipe.streams.io.NoFileManagerHelper;
+import org.schabi.newpipe.streams.io.NoFileManagerSafeGuard;
 import org.schabi.newpipe.streams.io.StoredFileHelper;
 import org.schabi.newpipe.util.FilePickerActivityHelper;
 
@@ -261,14 +259,13 @@ public class MissionsFragment extends Fragment {
             initialPath = Uri.parse(initialSavePath.getAbsolutePath());
         }
 
-        try {
-            requestDownloadSaveAsLauncher.launch(
-                    StoredFileHelper.getNewPicker(mContext, mission.storage.getName(),
-                            mission.storage.getType(), initialPath));
-        } catch (final ActivityNotFoundException aex) {
-            Log.w(TAG, "Unable to launch file picker", aex);
-            NoFileManagerHelper.showActivityNotFoundAlert(getContext());
-        }
+        NoFileManagerSafeGuard.launchSafe(
+                requestDownloadSaveAsLauncher,
+                StoredFileHelper.getNewPicker(mContext, mission.storage.getName(),
+                        mission.storage.getType(), initialPath),
+                TAG,
+                mContext
+        );
     }
 
     @Override