单击 FCM 通知时，Flutter Notification 挂起的意图被取消

Question

当我在应用程序处于后台时收到来自firebase_messaging 的通知时，单击它会在控制台Notification pending intent canceled 中记录此错误，而不是打开应用程序。什么都没有发生

请注意，我在这个项目中使用flutter 1.22..6，所以我不得不使用旧版本的firebase_messageing，即7.0.3

我的 AndroidManifest.xml 中有这些行：

<!-- Note i have changed MainActitvy to Application based on documutions -->
    <application
        android:name=".Application" 
        android:label="DR Vendor"
        android:requestLegacyExternalStorage="true"
        android:usesCleartextTraffic="true"
        android:icon="@mipmap/launcher_icon">
       ....

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

我有 Application.java 就像：

package Here I have my package name;

import io.flutter.app.FlutterApplication;
import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;

public class Application extends FlutterApplication implements PluginRegistrantCallback {

    @Override
    public void onCreate() {
        super.onCreate();
        FlutterFirebaseMessagingService.setPluginRegistrant(this);
    }

    @Override
    public void registerWith(PluginRegistry registry) {
        FirebaseCloudMessagingPluginRegistrant.registerWith(registry);
    }

}

并将此文件添加到同一文件夹中FirebaseCloudMessagingPluginRegistrant.java：

package my bundle name here;

import io.flutter.plugin.common.PluginRegistry;
import io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin;

public final class FirebaseCloudMessagingPluginRegistrant {
    public static void registerWith(PluginRegistry registry) {
        if (alreadyRegisteredWith(registry)) {
            return;
        }
        FirebaseMessagingPlugin.registerWith(registry.registrarFor("io.flutter.plugins.firebasemessaging.FirebaseMessagingPlugin"));
    }

    private static boolean alreadyRegisteredWith(PluginRegistry registry) {
        final String key = FirebaseCloudMessagingPluginRegistrant.class.getCanonicalName();
        if (registry.hasPlugin(key)) {
            return true;
        }
        registry.registrarFor(key);
        return false;
    }
}

下面是我如何将后台处理程序方法添加为静态顶级方法

ma​​in.dart

Future<dynamic> myBackgroundMessageHandler(Map<String, dynamic> message) async {
  if (message.containsKey('data')) {
    // Handle data message
    final dynamic data = message['data'];
  }

  if (message.containsKey('notification')) {
    // Handle notification message
    final dynamic notification = message['notification'];
    print("got notification");
    print(message);
  }
  print("reached here");
  // Or do other work.
}



Future<void> main() async {
....
  await Firebase.initializeApp();
  PushNotificationsManager().init();
...

这就是我在main.dart 中调用PushNotificationsManager().init(); 时初始化FCM 的方式

  Future<void> init() async {
    if (!_initialized) {
      // For iOS request permission first.
      _firebaseMessaging.requestNotificationPermissions();
      _firebaseMessaging.configure();
      var initializationSettingsAndroid =
      new AndroidInitializationSettings('@mipmap/launcher_icon');
      var initializationSettingsIOS = new IOSInitializationSettings();
      var initializationSettings = new InitializationSettings(
          android: initializationSettingsAndroid, iOS: initializationSettingsIOS);

      flutterLocalNotificationsPlugin.initialize(initializationSettings,
          onSelectNotification: onSelectNotification);
      configureNotifications();

      // For testing purposes print the Firebase Messaging token
      String token = await _firebaseMessaging.getToken();
      print("FirebaseMessaging token: $token");

      _initialized = true;
    }
  }
  configureNotifications() {
    final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
    _firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
        _showNotification(
            1234,
            "${message['notification']['title']}",
            "${message['notification']['body']}",
            "${message['data']['order_id']}");
        return;
      },
      onBackgroundMessage: myBackgroundMessageHandler,
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");
        return;
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
        onSelectNotification("${message['data']['order_id']}");
      },
    );
    _firebaseMessaging.requestNotificationPermissions(
        const IosNotificationSettings(
            sound: true, badge: true, alert: true, provisional: true));
    _firebaseMessaging.onIosSettingsRegistered
        .listen((IosNotificationSettings settings) {
      print("Settings registered: $settings");
    });
    _firebaseMessaging.getToken().then((String token) {
      assert(token != null);
    });
  }

Answer 1

第一个问题是在main中的初始化

PushNotificationsManager().init();

到

await Firebase.initializeApp();

并使用此代码打开活动或屏幕。

FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      print('A new onMessageOpenedApp event was published!');
      Navigator.pushNamed(context, '/message',
          arguments: MessageArguments(message, true));
    });

谢谢