FCM hasn't received any Message when app is closed on Android Oreo or Above

[amberkira]

Step 1: Describe your environment

• Android device: XIAOMI MIX2S_and XIAOMI 8
• Android OS version: ___android P and Android 8.1 __
• Google Play Services version: 4.2.0_
• Firebase/Play Services SDK version: firebase core 16.0.7 & messaging 17.3.4_

Step 2: Describe the problem:

   Goal: APP shows Notifications after FCM send message. 
   Problem: when app is closed , the app never received messages from FCM that happens on Devices with Android Oreo or above.

Steps to reproduce:

1. ---

2. ---

3. ---

Observed Results:

• What happened? This could be a description, logcat output, etc.

Expected Results:

• What did you expect to happen?

Relevant Code:

  @Override
  public void onMessageReceived(RemoteMessage remoteMessage) {
      super.onMessageReceived(remoteMessage);
      Context context = MainApplication.getContext();
      NotificationManager localNotificationManager = (NotificationManager)context.getSystemService("notification");

      Intent localIntent1 = new Intent(context, PreLoadActivity.class);
      localIntent1.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
      PendingIntent localPendingIntent = PendingIntent.getActivity(context, 0, localIntent1, PendingIntent.FLAG_CANCEL_CURRENT );

      String msg = context.getResources().getString(R.string.notification_content);
      if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
          Notification.Builder builder = new Notification.Builder(getApplicationContext(), "com.hellochinese.message")
                  .setContentTitle(context.getResources().getString(R.string.notification_title))
                  .setSmallIcon(R.drawable.app_icon)
                  .setContentIntent(localPendingIntent)
                  .setContentText(msg);
          NotificationChannel channel = new NotificationChannel("com.hellochinese.message", context.getString(R.string.app_name), NotificationManager.IMPORTANCE_MIN);
          channel.enableVibration(false);

          localNotificationManager.createNotificationChannel(channel);
          Notification notification = builder.build();
          localNotificationManager.notify(0, notification);

      }else {
          NotificationCompat.Builder alamNotificationBuilder = new NotificationCompat.Builder(
                  context).setContentTitle(context.getResources().getString(R.string.notification_title)).setSmallIcon(R.drawable.app_icon)
                  .setContentText(msg)
                  .setStyle(new NotificationCompat.BigTextStyle().bigText(msg))
                  .setContentIntent(localPendingIntent);

          Notification notification = alamNotificationBuilder.build();

          notification.defaults = Notification.DEFAULT_VIBRATE;
          localNotificationManager.notify(0, notification);
      }
  }

Message Json  Format:
{
"message":{
  "token":"dqQtpg3C6So:APA91bH6X-Kq3lk7-P7-bpqchGsZFRicmG12LFa7nd_V-Ol5paJrVmnsLOSxy-0g5lghJ3qKVcLVupenxpV7pFUHegtkZnJQrFPsU3_j2iTaPP9VBAaqVgxjY31aXpuwwa1O0CdeUj7q",
  "notification":{
    "title":"Portugal vs. Denmark",
    "body":"great match!"
  },
  "data" : {
    "Nick" : "Mariyyo",
    "Room" : "PortugalVSDenmark"
  },
},

 "to" : "dqQtpg3C6So:APA91bH6X-Kq3lk7-P7-bpqchGsZFRicmG12LFa7nd_V-Ol5paJrVmnsLOSxy-0g5lghJ3qKVcLVupenxpV7pFUHegtkZnJQrFPsU3_j2iTaPP9VBAaqVgxjY31aXpuwwa1O0CdeUj7q"
}

Http Url:
POST: https://fcm.googleapis.com/fcm/send

[samtstern]

@amberkira sorry about my slow response here. I appreciate that this isn't working for you, but there's no evidence here to suggest that it's anything different than what's going on in the many other FCM issues on this repo.

Sometimes there's nothing we can do, device manufacturers optimize their OS in a way that makes it impossible to push notifications to backgrounded or killed apps. We are always looking for ways to improve this.

[mtali]

How does other application i.e WhatsApp or Facebook solve this?

[frozenade]

How does other application i.e WhatsApp or Facebook solve this?

I'm wondering too

[EjilolaHammedEjitomiwa]

some apps are given special access to the device resources.
Like Whatsapp, phone messages etc