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

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 launch on channel plugins.flutter.io/url_launcher)

If you are using hot restart or hot reload, it won't do the trick. Since Flutter has to inject plugin dependencies into the platform-specific parts of your app, hot restart/hot reload is not enough to trigger the injection. Check this issue for more.

Close the app and execute flutter run command.

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

import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine
import io.flutter.plugins.GeneratedPluginRegistrant

class MainActivity: FlutterActivity() {
  override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
    GeneratedPluginRegistrant.registerWith(flutterEngine) // add this line
  }
}