GCM Notification setAutoCancel(true) not working in Android 5.1.1

Question

I am displaying a notification with this code, but setAutoCancel(true) is not working because when i press on the notification to open the app, the notification is still on the notifications bar and i must delete it manually with the finger gesture for deleting notifications or with the clear all button from notifications bar.

It works fine in android 4.4.2 device, but it does not work in my nexus 7 with 5.1.1

What is wrong?

private void generateNotification(Context context, String message) {

    Intent intent = new Intent(GCMListenerService.this, MainActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_ONE_SHOT);

    Bitmap image = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
    String appName = context.getResources().getString(R.string.app_name);       

    int width;
    int height;
    if (Util.checkAndroidVersionUpperOrEqualThan(11)){      
        width = getResources().getDimensionPixelSize(android.R.dimen.notification_large_icon_width); 
        height = getResources().getDimensionPixelSize(android.R.dimen.notification_large_icon_height);
    }else{
        width = 64;
        height = 64;
    }

    image = Bitmap.createScaledBitmap(image, width, height, false);

    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(getApplicationContext())
    .setSmallIcon(R.drawable.ic_launcher)
    .setLargeIcon(image)
    .setContentTitle(appName)
    .setContentText(message)
    .setSound(defaultSoundUri)
    .setPriority(NotificationCompat.PRIORITY_HIGH)
    .setContentIntent(pendingIntent)
    .setAutoCancel(true)
    .setStyle(new NotificationCompat.BigTextStyle().bigText(message));

    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

    notificationManager.notify(0,notificationBuilder.build());

}

Answer 1

You must set Notification flag with .setOngoing(true)

   val builder = NotificationCompat.Builder(context, channelId)
   builder.setOngoing(true)
   notification = builder.build()
   notification.flags = Notification.FLAG_ONGOING_EVENT