如何使用更改通知程序的共享首选项

Question

我正在尝试从更改通知程序中了解共享首选项包。这是我的代码：

Future<void> main() async {
  SharedPreferences prefs = await SharedPreferences.getInstance();
  runApp(
    MultiProvider(
      providers: [
        ChangeNotifierProvider(create: (_) => GlobalSettings1(prefs: prefs)),

      ],
      child: MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        debugShowCheckedModeBanner: false,
        initialRoute: '/',
        routes: {
          '/': (context) => Page01(),


        });
  }
}

class Page01 extends StatefulWidget {
  const Page01({Key? key}) : super(key: key);

  @override
  State<Page01> createState() => _Page01State();
}

class _Page01State extends State<Page01> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          SizedBox(height: 30,),
          InkWell(
            onTap: () {
              context.read<GlobalSettings1>().ToggleSwitch();
            },
            child: Container(
              height: 30,
              width: 80,
              color: context.watch<GlobalSettings1>().toggleSwitch01
                  ? Colors.green
                  : Colors.red,
            ),
          ),
                    
        ],
      ),
    );
  }
}

这是我的更改通知程序：

class GlobalSettings1 with ChangeNotifier {
  bool _toggleSwitch01 = true;

  final SharedPreferences prefs;

  GlobalSettings1({required this.prefs});

  bool get toggleSwitch01 => _toggleSwitch01;

  void ToggleSwitch() {
    _toggleSwitch01 = !_toggleSwitch01;
    _setPrefItems();
    notifyListeners();
  }

  void _setPrefItems() {
    prefs.setBool('toggleSwitch01', _toggleSwitch01);
    notifyListeners();
  }

  void _getPrefItems() {
    _toggleSwitch01 = prefs.getBool('toggleSwitch01') ?? true;
    notifyListeners();
  }

  bool getToggleSwitch01() {
    _getPrefItems();
    return _toggleSwitch01;
  }

}

我如何在我的代码中使用 setprefitems 和 getprefitems 来制作它以便在应用程序关闭然后再次启动时保存 toggleswitch01 bools 状态？

非常感谢