如何在颤动中更改StreamBuilder内特定拨动开关的状态

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('StreamBuilder Switch Example')),
        body: StreamBuilder<bool>(
          stream: getSwitchStream(),
          builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
            if (snapshot.hasData) {
              return Center(
                child: Switch(
                  value: snapshot.data!,
                  onChanged: (bool value) {
                    // 这里可以处理开关状态变化
                  },
                ),
              );
            } else {
              return Center(child: CircularProgressIndicator());
            }
          },
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () {
            // 改变开关状态
            _changeSwitchState();
          },
          child: Icon(Icons.toggle_on),
        ),
      ),
    );
  }

  Stream<bool> getSwitchStream() async* {
    bool currentValue = false;
    while (true) {
      await Future.delayed(Duration(seconds: 1));
      yield currentValue;
      currentValue = !currentValue;
    }
  }

  void _changeSwitchState() {
    // 这里可以调用某种方法来改变开关状态
    // 例如，通过改变流中的值
  }
}