Flutter Notification pending intent canceled when clicked on FCM notification

Question

when I get a notification from firebase_messaging while the application is in the background when I click it logs this error in the console Notification pending intent canceled instead of opening the app. and nothing happens

please note that am using flutter 1.22..6 for this project so I had to use an old version of firebase_messageing which is 7.0.3

I have those lines in my AndroidManifest.xml :

<!-- 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>

And I have Application.java to be like :

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);
    }

}

And added this file in the same folder 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;
    }
}

And here is how I added my background handler method as a static top-level method

main.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();
...

And this is how i initalize FCM when i called the line PushNotificationsManager().init(); in main.dart

  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

The first problem is in the initialization in the main

PushNotificationsManager().init();

to

await Firebase.initializeApp();

and use this code for opened a activity or screen.

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

thanks