yokutango-mobile-reader/lib/main.dart

import 'package:get_it/get_it.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:tangocard_reader/router.dart';
import 'package:flutter/material.dart';

import 'service/theme_bloc.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  GetIt.instance.registerSingleton<SharedPreferences>(
      await SharedPreferences.getInstance());
  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) => BlocProvider(
        create: (context) => ThemeBloc(
            init:
                (GetIt.instance.get<SharedPreferences>().getBool('darkTheme') ??
                        false)
                    ? Brightness.dark
                    : Brightness.light),
        child: BlocBuilder<ThemeBloc, Brightness>(
          builder: (context, state) => MaterialApp(
            title: 'Tangocard Reader',
            theme: ThemeData(
              fontFamily: 'Noto Sans CJK',
              primarySwatch: Colors.blue,
              brightness: state,
            ),
            initialRoute: '/',
            onGenerateRoute: PageRouter.generateRoute,
          ),
        ),
      );
}