通知处理程序

void firebaseCloudMessagingListeners() {
    _firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        print('onMessage ==> $message');
        messageHandler(message);
      },
      onResume: (Map<String, dynamic> message) async {
        print('onResume ==> $message');
        messageHandler(message);
      },
      onLaunch: (Map<String, dynamic> message) async {
        print('onLaunch ==> $message');
        messageHandler(message);
      },
      onBackgroundMessage: Platform.isIOS ? null : myBackgroundMessageHandler,
    );
  }

  static Future<dynamic> myBackgroundMessageHandler(
      Map<String, dynamic> message) {
    print('onBackgroundMessage ==> $message');
    if (message.containsKey('data')) {
      final dynamic data = message['data'];
      print('$data');
    }

    if (message.containsKey('notification')) {
      final dynamic notification = message['notification'];
      print('$notification');
    }

    return null;
  }

开机自检https://fcm.googleapis.com/fcm/send

{
   "to": "myFCMToken",
   "priority": "high",
   "data": {
      "click_action": "FLUTTER_NOTIFICATION_CLICK",
      "data_title": "data_title",
      "data_body": "data_body"
   },
   "notification": {
      "title": "Good Night",
      "body": "Wish you have a nice dream..",
      "sound": "default"
   }
}

当我用上面的有效负载发送通知时，通知被传送到系统托盘，当我点击它时，我有以下三种情况：
1.应用程序处于后台（关闭/终止），显示“数据”并调用onLaunch方法。
1.应用程序处于后台（最小化），缺少“数据”，未调用onResume方法。
1.应用程序位于前台，缺少“数据”，未调用onMessage方法。
问题是，如何接收或处理通知的“数据”也传递到系统托盘？任何帮助将不胜感激。