async-bloc-init-in-flutter.dart

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class App extends StatelessWidget {
  const App({
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return BlocProvider<AppBloc>(
      create: (context) => AppBloc()..add(const AppEventInitialize()),
      child: MaterialApp(
        title: 'Photo Library',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        debugShowCheckedModeBanner: false,
        home: BlocConsumer<AppBloc, AppState>(
          listener: (context, state) {
            // handle loading
            if (state.isLoading) {
              LoadingScreen().show(
                context: context,
                text: 'Loading...',
              );
            } else {
              LoadingScreen().hide();
            }
            
            ... rest of your code goes here