Firebase onMessage回调函数未触发

这是我的密码：

initializeApp() async {
  FirebaseMessaging firebaseMessaging = FirebaseMessaging();
  firebaseMessaging.configure(
    onMessage: (Map<String, dynamic> message) async {
      print("----->onMessage: $message");
    },
    onLaunch: (Map<String, dynamic> message) async {
      print("----->onLaunch: $message");
    },
    onResume: (Map<String, dynamic> message) async {
      print("----->onResume: $message");
    },
  );
  firebaseMessaging.requestNotificationPermissions(const IosNotificationSettings(sound: true, badge: true, alert: true));

}

---

这里也有问题，但没有回答。

将此代码添加到您的AndroidManifest.xml中

<intent-filter>
 <action android:name="FLUTTER_NOTIFICATION_CLICK"/>
 <category android:name="android.intent.category.DEFAULT"/>
</intent-filter>

所以这就是斯克雷纳里奥： 我有2个应用程序：在这两个应用程序上，我都测试过有状态小部件处于活动屏幕：

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';

class FCMTestPage extends StatefulWidget {
  static String name = '/test-fcm';

  @override
  _FCMTestPageState createState() => _FCMTestPageState();
}

class _FCMTestPageState extends State<FCMTestPage> {
  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
  final List<Message> messages = [];

  String token;

  @override
  void initState() {
    super.initState();


    _firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
        final notification = message['notification'];
        setState(() {
          messages.add(Message(
              title: notification['title'], body: notification['body']));
        });
      },
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");

        final notification = message['data'];
        setState(() {
          messages.add(Message(
            title: '${notification['title']}',
            body: '${notification['body']}',
          ));
        });
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
      },
    );
    _firebaseMessaging.requestNotificationPermissions(
        const IosNotificationSettings(sound: true, badge: true, alert: true));
  }

  @override
  Widget build(BuildContext context) {
    // getToken();
    return Scaffold(
      body: ListView(
        children: messages.map(buildMessage).toList(),
      ),
    );
  }

  Widget buildMessage(Message message) => ListTile(
    title: Text(message.title),
    subtitle: Text(message.body),
  );

  getToken() async {
     token = await _firebaseMessaging.getToken();
     print('********************************************');
     print(token);
     print('********************************************');
  }

}


@immutable
class Message {
  final String title;
  final String body;

  const Message({
    @required this.title,
    @required this.body,
  });
}

*删除了一些不相关的行

有趣的是，相同的代码适用于一个应用程序，而不适用于另一个应用程序。在同一个应用程序中，相同的代码在有状态小部件中工作，而在顶级函数中不工作（我尝试在类中封装，使函数为静态，但没有帮助）

我是如何解决的：

然后，我需要快速解决问题，并决定将我的一个屏幕转换为有状态，并将逻辑迁移到此屏幕。

---

可能与垃圾收集有关。

不过我有这个

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';

class FCMTestPage extends StatefulWidget {
  static String name = '/test-fcm';

  @override
  _FCMTestPageState createState() => _FCMTestPageState();
}

class _FCMTestPageState extends State<FCMTestPage> {
  final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
  final List<Message> messages = [];

  String token;

  @override
  void initState() {
    super.initState();


    _firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
        final notification = message['notification'];
        setState(() {
          messages.add(Message(
              title: notification['title'], body: notification['body']));
        });
      },
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");

        final notification = message['data'];
        setState(() {
          messages.add(Message(
            title: '${notification['title']}',
            body: '${notification['body']}',
          ));
        });
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
      },
    );
    _firebaseMessaging.requestNotificationPermissions(
        const IosNotificationSettings(sound: true, badge: true, alert: true));
  }

  @override
  Widget build(BuildContext context) {
    // getToken();
    return Scaffold(
      body: ListView(
        children: messages.map(buildMessage).toList(),
      ),
    );
  }

  Widget buildMessage(Message message) => ListTile(
    title: Text(message.title),
    subtitle: Text(message.body),
  );

  getToken() async {
     token = await _firebaseMessaging.getToken();
     print('********************************************');
     print(token);
     print('********************************************');
  }

}


@immutable
class Message {
  final String title;
  final String body;

  const Message({
    @required this.title,
    @required this.body,
  });
}

initializeApp() async {
  FirebaseMessaging firebaseMessaging = FirebaseMessaging();
  firebaseMessaging.configure(

    onMessage: (Map<String, dynamic> message) async {
      print("onMessage: $message");
    },

    onLaunch: (Map<String, dynamic> message) async {
      print("onLaunch: $message");
    },

    onResume: (Map<String, dynamic> message) async {
      print("onResume: $message");
    },

  );

  firebaseMessaging.requestNotificationPermissions(const IosNotificationSettings(sound: true, badge: true, alert: true));

}