如何删除应用后台出现的单个fcm通知？

Question

 @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
............
     notificationManager.notify("tag", notificationId, notification);
.......
}

用于删除邮件

  private void clearNotifications() {

        NotificationManager nMgr = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        nMgr.cancel("tag",notificationId);
    }

这是有效的，但当应用程序关闭时，代码不起作用。我们能从服务器端有效负载通知或附加标记和id吗

Answer 1

{
  "message":{
    "token":"bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...",
    "notification":{
      "title":"Portugal vs. Denmark",
      "body":"great match!"
    }
  }
}

  "message":{
    "token":"bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...",
    "data":{
      "Nick" : "Mario",
      "body" : "great match!",
      "Room" : "PortugalVSDenmark"
    }
  }
}