Injecting services into Widget's using package:inject

main.dart

void main() async {
  var container = await AppComponent.create(ServicesModule(), ViewModelModule());
  runApp(container.app);
}

@provide
class MyApp extends StatelessWidget {
  final Router _router;
  MyApp(this._router);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      initialRoute: '/',
      onGenerateRoute: _router.generateRoute
    );
  }
}

router.dart

@provide
class Router {
  final Provider<HomeView> _homePage;
  final Provider<LoginView> _loginPage;
  final Provider<SettingsView> _settingsPage;
  
  Router(
    this._homePage,
    this._loginPage,
    this._settingsPage,
  );

  Route<dynamic> generateRoute(RouteSettings settings) {
    switch (settings.name) {
      case '/':
        return MaterialPageRoute(builder: (_) => _homePage());
      case '/login':
        return MaterialPageRoute(builder: (_) => _loginPage());
      case '/settings':
        return MaterialPageRoute(builder: (_) => _settingsPage());
      default:
        return MaterialPageRoute(
            builder: (_) => Scaffold(
                  body: Center(
                      child: Text('No route defined for ${settings.name}')),
                ));
    }
  }
}

services_module.dart

@module
class ServicesModule {
  @provide
  @singleton
  SomeService provideSomeService() => SomeService();
}

settings_view.dart

class SettingsView extends StatefulWidget {
  SettingsView({Key key, this.someService}) : super(key: key);
  
  final SomeService someService;

  @override
  _SettingsViewState createState() => _SettingsViewState();
}

class _SettingsViewState extends State<SettingsView> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Settings"),
      ),
      body: Center(
        child: Text("Settings"),
      ),
    );
  }
}

view_module.dart

@module
class ViewModule {
  @provide
  MyWidgetView provideMyWidgetView(SomeService someService) => MyWidgetView({someService: someService});
}