如果应用程序位于后台，则Firebase通知无法正常工作[重复]

Question

public class FcmMessagingService extends FirebaseMessagingService {

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    String message = remoteMessage.getNotification().getBody();

    Map<String, String> params = remoteMessage.getData();

    Bitmap remote_picture = null;
    remote_picture = BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.logo);

    intent = new Intent(this, HomeDrawer.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    PendingIntent pendingIntent = PendingIntent.getActivity(this,0,intent, PendingIntent.FLAG_ONE_SHOT);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
    notificationBuilder.setContentTitle("Notification Title");
    notificationBuilder.setContentText(message);
    notificationBuilder.setSmallIcon(R.drawable.ic_notif);
    notificationBuilder.setLargeIcon(remote_picture);
    notificationBuilder.setAutoCancel(true);
    notificationBuilder.setContentIntent(pendingIntent);
    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    Notification noti = new Notification();
    noti = notificationBuilder.build();
    //notificationBuilder.setVibrate(new long[] { 1000, 1000});
    //notificationBuilder.setSound(Settings.System.DEFAULT_NOTIFICATION_URI);
    noti.flags |= Notification.FLAG_ONLY_ALERT_ONCE;
    notificationManager.notify(0,noti);

    super.onMessageReceived(remoteMessage);
}

 intent = new Intent(this, HomeDrawer.class);

Answer 1

"notification" : {
  "body" : "great match!",
  "title" : "Portugal vs. Denmark",
  "icon" : "myicon", // the name of the resource
  "sound" : "mySound"
}