FCM：我已使用FCM接收有关我的应用程序的通知。 当我的应用程序处于前台时，它将所有通知分组，但不将其组合到后台时

Question

I am able to group notifications for my app when it is in foreground. Whenever the app goes in background it creates multiple notification. How can I fix this?

Answer 1

As google says in this site , when app is in background notifications are administrated by the system by default :

Notifications delivered when your app is in the background. In this case, the notification is delivered to the device's system tray. A user tap on a notification opens the app launcher by default.

But if you want to work with the notifications by "yourself" you should send the 'data message' instead of the 'notification' as is said here and you can handle the notification.