firebase - Flutter中的Fcm背景通知

Question

我已经使用Firebase消息传递在后台实现了通知。但是，问题是这样的；如何将数据从功能myBackgroundMessageHandler返回到FirebaseNotification？

Future<dynamic> myBackgroundMessageHandler(Map<String, dynamic> message) {
      return Future<void>.value();
    }

    class FirebaseNotifications {
      FirebaseMessaging _firebaseMessaging;
      FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

      void setUpFirebase() {
        _firebaseMessaging = FirebaseMessaging();
      }

      void fcmListeners() {
        _firebaseMessaging.configure(
          onMessage: (Map<String, dynamic> message) async {
            print("OnMessage");
            processNotification(message);
            return;
          },
          onBackgroundMessage: myBackgroundMessageHandler,
          onLaunch: (Map<String, dynamic> message) async {
            print("onLaunch");
            processNotification(message);
            return;
          },
          onResume: (Map<String, dynamic> message) async {
            print("onResume");
            processNotification(message);
            return;
          },
        );
      }

      processNotification(message) {}
    }

Answer 1

目前，fireflutter库中存在一个错误。即使使用静态或全局变量，也无法从代码中访问变量。

在这里看看:

https://github.com/FirebaseExtended/flutterfire/issues/1878