我正在尝试访问一些用户设置，这些设置会在整个应用程序中更改和访问。为此，我使用hive从一个框中检索用户设置。我想通过打开 UserSettings 从检索的对象 Hive.box('settings').get(userID) 流入一条小溪，然后注入 StreamProvider .
我该怎么转身呢 Hive.box('settings').get(userID) 变成一条小溪？
编辑：以下是我迄今为止的代码实现：
本地数据库.dart

static Stream<UserSettings> get userSettings {
  return Hive.box('settings').watch(key: userID)?.map((boxEvent) {
    return boxEvent.value; // ========> value is always null from boxEvent
  });
}

static void saveUserSettings(UserSettings userPref) {
  Hive.box('settings').put(userID, userPref); 
}

main.dart公司

class Launch extends StatefulWidget {
  @override
  _LaunchState createState() => _LaunchState();
}

class _LaunchState extends State<Launch> {
  @override
  Widget build(BuildContext context) {
    return MultiProvider(
      providers: [
        StreamProvider<User>.value(value: AuthService.user),
        StreamProvider<UserSettings>.value(value: LocalDatabase.userSettings),
      ],
      child: MaterialApp(
        title: 'MyApp',
        home: AuthWrapper(),
      ),
    );
  }

设置.dart

class SettingsScreen extends StatefulWidget {
  @override
  _SettingsScreenState createState() => _SettingsScreenState();
}

class _SettingsScreenState extends State<SettingsScreen> {
  UserSettings _settings;

  @override
  Widget build(BuildContext context) {
    _settings = Provider.of<UserSettings>(context);

    print(_settings.useLightTheme); // =====> Always returns null

    return Scaffold(
      appBar: AppBar(title: 'Settings'),
      body: Container()
    ),
  }
}