I can't run Alarm in the handler of onBackgroundMessage

[ayoub-kplr]

Actually onBackgroundMessage works perfectly, but I can't run the Alarm inside the handler.

Here's the code of firebase_api.dart:

class FirebaseApi {
  final _firebaseMessaging = FirebaseMessaging.instance;
  final DatabaseReference dbRef = FirebaseDatabase.instance.ref();

  Future<void> initNotification() async {
    await _firebaseMessaging.requestPermission();
    // check for internet !!!!!!!!!!!!!!!!!!!!!
    final fCMToken = await _firebaseMessaging.getToken();

    print("Token: $fCMToken");
    
  }

  static Future<dynamic> _firebaseMessagingBackgroundHandler(
      RemoteMessage message) async {
    print("Handling background message");
    await Alert.startAlarm("");
  }

  Future initPushNotifications() async {
    // handle notif if the app was terminated and now opened
    FirebaseMessaging.instance.getInitialMessage().then((value) => null);
    // attach event listners for when a notification opens the app

    FirebaseMessaging.onMessageOpenedApp
        .listen(_firebaseMessagingBackgroundHandler);
    FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
  }
}

And the code of Alert.startAlarm() using alarm: ^0.0.6 :

  static Future<void> startAlarm([String? key]) async {
    print("from alert");
    
   
    if (!isRinging) {
      await Alarm.init();
      await Alarm.set(
          alarmDateTime: DateTime.now(),
          assetAudio: "assets/alarm.mp3",
          onRing: () => setIsRinging(true),
          notifTitle: 'Gas leak',
          notifBody: key == null
              ? 'Alerte après 5 minutes, Fuite de gaz'
              : 'Alerte de l\'appareil ${key}',
          loopAudio: true);
    }
  }