Add this to your package's pubspec.yaml file:
dev_dependencies:
assets_builder:
git:
url: https://github.com/kecson/assets_builder.git
flutter pub get
flutter pub run assets_builder
Now in your Dart code, you can use:
import 'generated/assets.dart';
//use image
Image(image: AssetImage(Assets.images_ic_launcher_png))