FCM push notification working in Foreground and Background but not working when app is closed

Question

I have implemented Firebase but unfortunately notifications are only working when app is in Foreground or Background but unable to receive any notification when app is closed. I tried surfing online but couldn't get any results. Is there any way to keep app alive in background even after closing it? If yes i think this will help to receive notifications. Any helpful suggestions are entertained. Thanks

Answer 1

One thing i do is that i don't rely on the notification response, I rather pass the data object and make a custom notification myself.

Here is the code that might help you as we can access the data object even when app is open as well as closed:

Map<String, String> dataMap = remoteMessage.getData();
String notif = dataMap.get("title");

Then i use this function to make a notification

 private void notificationManager(Context context, String message) {

    try {
        long when = System.currentTimeMillis();

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

        Log.v("message", "," + message);

        Intent notificationIntent = new Intent(context, SplashActivity.class);


        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0);

        NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
        builder.setAutoCancel(true);
        builder.setContentTitle(context.getString(R.string.app_name));
        builder.setStyle(new NotificationCompat.BigTextStyle().bigText(message));
        builder.setContentText(message);
        builder.setTicker(message);
        builder.setLights(Color.GREEN, 500, 500);
        builder.setWhen(when);
        builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));
        builder.setSmallIcon(R.mipmap.ic_launcher);
        builder.setContentIntent(intent);


        Notification notification = builder.build();
        notification.ledARGB = 0xFFff0000;
        notification.flags = Notification.FLAG_SHOW_LIGHTS;
        notification.ledOnMS = 100;
        notification.ledOffMS = 100;
        notificationManager.notify(1, notification);

        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG");
        wl.acquire(15000);

    } catch (Exception e) {
        e.printStackTrace();
    }

}

Hope this helps.

Answer 2

FCM has two messaging services

1. Display messaging
2. Data messaging

Probably you are using display messaging. You should use data messaging instead of display messaging. Display messaging won't work when app is closed.