Question 77036 in Flutter Question posted in
The official Flutter documentation can be found here.

FirebaseMessaging.instance.getInitialMessage() returning null – Flutter

After carefully trying other answer, nothing seems to work.

Notification are working fine, when I click on them and the app has been initialised.

When the app is closed or terminated it is impossible for me to redirect the user to a page because the value of the getInitialMessage() is null.

For example, this return null, but it is the home page of my Flutter app

 @override
  void initState() {
    super.initState();
    FirebaseMessaging.instance
        .getInitialMessage() 
        .then((message) => print('Initial message: $message'))

Main.dart

Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  await Firebase.initializeApp();

 
}

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
  await FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(
    alert: true,
    badge: true,
    sound: true,
  );

  
  runApp(const FrontDeskApp());
}

Thank you

Tags:

2

Answers


  1. 0

    This may be the reason because you are using getInitialMessage() method in wrong way.

    Modify your main.dart like the below way and test.

    void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();

  FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);

  await FirebaseMessaging.instance.getInitialMessage().then((remoteMessage) {

    // whenever you open the app from the terminate state by clicking on Notification message, 
       here you will get your remoteMessage.

    // Set you App Screen Redirection here.

    // Once consumed, the RemoteMessage will be removed.

  });
  runApp(const MyApp());
}

    For more reference please refer to the official document for Handling Interaction of Notification

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  2. 0

    I was working on the same issue. And it seems always null.

    I believe the misconception is that getInitialMessage() is not filled if the app is not opened via clicking the push message, but by directly opening via AppIcon

    The documentation says:

    The firebase-messaging package provides two ways to handle this
    interaction:

    getInitialMessage(): If the application is opened from a terminated
    state a Future containing a RemoteMessage will be returned. Once
    consumed, the RemoteMessage will be removed. onMessageOpenedApp: A
    Stream which posts a RemoteMessage when the application is opened from
    a background state.

    And by interaction it probably refers to "For example, if a new chat message is sent via a notification and the user presses it,"

    https://firebase.google.com/docs/cloud-messaging/flutter/receive#handling_interaction

    So, seemingly there is no way to track if there is a lingering push notification, when opened by app icon.

    Correct me if I’m wrong.

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