MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences) while getting FCM in background

Question

I'm working on a Flutter app in which I'm using the shared_preferences: ^2.0.13 package.

• Flutter version : 2.10.1 (latest)

• gradle version: 6.7

• Android gradle plugin version: 4.1.3

• kotlin version: 1.6.10

• flutterEmbedding 2 (in android menifiest)

MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences).

While getting FCM message received in background.

main.dart

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

  print('Got a message onBackgroundMessageHandler_');
  print("Handling a background message: ${message.messageId}");

  print('Shared pref process starts');
  SharedPreferences sf = await SharedPreferences.getInstance();
  sf.setString("key", "Value");
  print('${sf.getKeys()}');
  print('Shared pref process ends');
}

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

  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

  runApp(const MyApp());
}

MainActivity.kt

class MainActivity: FlutterActivity() {

}

Solution

please reference to my post

you need to register share_preference for background access

io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin.registerWith(registry.registrarFor("io.flutter.plugins.sharedpreferences.SharedPreferencesPlugin"));

Comments

[Anmol Mishra]

Something that work for me is: Delete your pubspec.lock, and press Pub Get in your pubspec.yaml, it'll regenerate pubspec.lock file again and should fix the problem.

[Urvesh Rathod]

@Amol Mishra It doesn't work for me.

[Anmol Mishra]

you try this command Flutter clean

[Urvesh Rathod]

@Amol Mishra i have tried flutter clean also its not working for me.

[Pokaboom]

try uninstalling the app and reinstalling it

[Urvesh Rathod]

@Pokaboom i have already try this many times. but not working getting same error.

[Urvesh Rathod]

I have already done in my application.kt but its not working for me.

[MerdanDev]

In the latest versions of flutter plugins are automatically registered by generated_plugin_registrant.dart, in this case FirebaseMessaging.onBackgroundMessage uses seperate isolate than main and in this isolate all third party dependencies gets unavailable.

[George ozzy]

@MerdaDev, How can we fix this then?