FCM不用firbase_messgage在颤音中工作： ^11.4.2

Question

fcm不用firbase_messaging在颤音中工作： ^11.4.2

我尝试使用旧数据和新的数据有效载荷，以实现FCM，但当我们手动从Firebase发送通知时。它来了，击中了本地广播的接收器， 消息显示，但是当我们按代码和响应发送时，我们会得到200，这很好，但是插件中的问题在于，该插件没有按时广播接收器，因此该消息不显示。

//<--Here -- sendPushMessageRun Here-->
  Future<void> sendPushMessage() async  {
    if (_token == null) {
      print('Unable to send FCM message, no token exists.');
      return;
    }

    try {
      final response = await http.post(
        Uri.parse('https://api.rnfirebase.io/messaging/send'),
        headers: <String, String>{
          'Content-Type': 'application/json; charset=UTF-8',
          'Authorization': 'key=A....Q'
        },
        body: constructFCMPayload(_token),
      );
      if(response.statusCode == 200){
        print('Done!');
       await Firebase.initializeApp();
        ///
       await FirebaseMessaging.onMessage.listen((RemoteMessage message) {
          RemoteNotification? notification = message.notification;
          AndroidNotification? android = message.notification?.android;
          if (notification != null && android != null && !kIsWeb) {
            flutterLocalNotificationsPlugin.show(
              notification.hashCode,
              notification.title,
              notification.body,
              NotificationDetails(
                android: AndroidNotificationDetails(
                  channel.id,
                  channel.name,
                  channelDescription:channel.description,
                  // TODO add a proper drawable resource to android, for now using
                  //      one that already exists in example app.
                  icon: 'launch_background',
                ),
              ),
            );
          }
        });

      }else{
        print('Not Done!'+response.statusCode.toString());
      }

    } catch (e) {
      print(e);
    }
  }

String constructFCMPayload(String? token) {
  _messageCount++;
  return jsonEncode({
    'topic': "fcm_test", //also try with "to" : "/topics/fcm_test"
    'data': {
      'via': 'FlutterFire Cloud Messaging!!!',
      'count': _messageCount.toString(),
    },
    'notification': {
      'title': 'Hello FlutterFire!',
      'body': 'This notification (#$_messageCount) was created via FCM!',
    },
  });`enter code here`
}