无法在 android 中使用 flutter 获取后台通知

Question

我正在使用 FCM 通过 flutter 推送通知，前台通知运行良好，但在后台时它没有收到任何通知。

这是我的代码

class Home extends StatefulWidget {

@覆盖 _HomeState createState() => _HomeState(); }

class _HomeState extends State<Home> {
  String token = '';
  final FirebaseMessaging firebaseMessaging = FirebaseMessaging.instance;

  @override
  void initState() {
    getToken();

    firebaseMessaging.requestPermission(
        alert: true, badge: true, provisional: true, sound: true);

    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      print("onMessage: $message");
    });


    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      print("onMessageOpenedApp: $message");
    });


    super.initState();
  }

  void getToken() async {
    token = (await firebaseMessaging.getToken())!;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(child: Text("Token : $token")),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          print(token);
        },
        child: Icon(Icons.print),
      ),
    );
  }
}

Answer 1

您需要定义一个顶级命名处理程序，自上次 firebase_messaging 10.0.6 以来。通知将在后台运行首先更新你的 firebase_messaging 10.0.6

/// 定义一个顶级命名处理程序，background/terminated 消息将 /// 称呼。 /// /// 要验证一切正常，请查看本机平台日志。

Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  // If you're going to use other Firebase services in the background, such as Firestore,
  // make sure you call `initializeApp` before using other Firebase services.
  await Firebase.initializeApp();
  print('Handling a background message ${message.messageId}');
}

请在此处查看完整示例：firebase_messaging/example

如果您需要一个真实的项目示例complete example

无法在 android 中使用 flutter 获取后台通知

Can not get background notifications in android using flutter

android

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firebase

flutter

firebase-cloud-messaging