Added notification channel and code to show notification.

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

@@ -63,6 +63,7 @@ import io.reactivex.plugins.RxJavaPlugins;
 public class App extends Application {
     protected static final String TAG = App.class.toString();
     private RefWatcher refWatcher;
+    private static App context;
 
     @SuppressWarnings("unchecked")
     private static final Class<? extends ReportSenderFactory>[] reportSenderFactoryClasses = new Class[]{AcraReportSenderFactory.class};
@@ -85,6 +86,8 @@ public class App extends Application {
         }
         refWatcher = installLeakCanary();
 
+        context = this;
+
         // Initialize settings first because others inits can use its values
         SettingsActivity.initSettings(this);
 
@@ -202,6 +205,22 @@ public class App extends Application {
 
         NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
         mNotificationManager.createNotificationChannel(mChannel);
+
+        // Set up notification channel for app update
+        final String appUpdateId
+                = getString(R.string.app_update_notification_channel_id);
+        final CharSequence appUpdateName
+                = getString(R.string.app_update_notification_channel_name);
+        final String appUpdateDescription
+                = getString(R.string.app_update_notification_channel_description);
+
+        NotificationChannel appUpdateChannel
+                = new NotificationChannel(appUpdateId, appUpdateName, importance);
+        appUpdateChannel.setDescription(appUpdateDescription);
+
+        NotificationManager appUpdateNotificationManager
+                = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
+        appUpdateNotificationManager.createNotificationChannel(appUpdateChannel);
     }
 
     @Nullable
@@ -217,4 +236,8 @@ public class App extends Application {
     protected boolean isDisposedRxExceptionsReported() {
         return false;
     }
+
+    public static App getContext() {
+        return context;
+    }
 }

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

@@ -1,7 +1,12 @@
 package org.schabi.newpipe;
 
+import android.app.Application;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.net.Uri;
 import android.os.AsyncTask;
-import android.util.Log;
+import android.support.v4.app.NotificationCompat;
+import android.support.v4.app.NotificationManagerCompat;
 
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -88,8 +93,6 @@ public class FetchAppVersionTask extends AsyncTask<Void, Void, String> {
 
         if (output != null) {
 
-            Log.i("output---", output);
-
             try {
                 JSONObject mainObject = new JSONObject(output);
                 JSONObject flavoursObject = mainObject.getJSONObject("flavors");
@@ -108,11 +111,37 @@ public class FetchAppVersionTask extends AsyncTask<Void, Void, String> {
         }
     }
 
+    /**
+     * Method to compare
+     * @param versionName
+     * @param apkLocationUrl
+     */
     private void compareAppVersionAndShowNotification(String versionName, String apkLocationUrl) {
 
-        if (!BuildConfig.VERSION_NAME.equals(versionName)) {
+        int NOTIFICATION_ID = 2000;
 
+        if (!BuildConfig.VERSION_NAME.equals(versionName.replace("v", ""))) {
 
+            Application app = App.getContext();
+
+            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(apkLocationUrl));
+            PendingIntent pendingIntent
+                    = PendingIntent.getActivity(app, 0, intent, 0);
+
+            NotificationCompat.Builder notificationBuilder = new NotificationCompat
+                    .Builder(app, app.getString(R.string.app_update_notification_channel_id))
+                    .setSmallIcon(R.drawable.ic_newpipe_triangle_white)
+                    .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+                    .setContentIntent(pendingIntent)
+                    .setAutoCancel(true)
+                    .setContentTitle(app.getString(R.string.app_update_notification_content_title))
+                    .setContentText(app.getString(R.string.app_update_notification_content_text)
+                            + " " + versionName);
+
+            NotificationManagerCompat notificationManager = NotificationManagerCompat.from(app);
+
+            // notificationId is a unique int for each notification that you must define
+            notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build());
         }
     }
 }

app/src/main/res/values/strings.xml

@@ -144,6 +144,10 @@
     <string name="notification_channel_name">NewPipe Notification</string>
     <string name="notification_channel_description">Notifications for NewPipe Background and Popup Players</string>
 
+    <string name="app_update_notification_channel_id" translatable="false">newpipeAppUpdate</string>
+    <string name="app_update_notification_channel_name">App Update Notification</string>
+    <string name="app_update_notification_channel_description">Notifications for new NewPipe version</string>
+
     <string name="unknown_content">[Unknown]</string>
 
     <string name="toggle_orientation">Toggle Orientation</string>
@@ -504,4 +508,8 @@
         <item>144p</item>
     </string-array>
 
+    <!-- App update notification -->
+    <string name="app_update_notification_content_title">NewPipe Update Available</string>
+    <string name="app_update_notification_content_text">Tap to download</string>
+
 </resources>