Answers for "Unhandled Exception: MissingPluginException(No implementation found for method getApplicationSupportDirectory on channel plugins.flutter.io/path_provider)"

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

inside main.dart before start app add below code

SharedPreferences.setMockInitialValues({});

for reason:
https://stackoverflow.com/questions/50687801/flutter-unhandled-exception-missingpluginexceptionno-implementation-found-for

unhandled Exception: MissingPluginException(No implementation found for method Firebase#initializeCore on channel plugins.flutter.io/firebase_core)

Make sure your google-services.json file is copied into the correct folder