switch and checkbox

import 'package:flutter/material.dart';

void main()=>runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  int _counter=0;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body:Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            SwitchAndCheckBoxTestRoute(),
          ],
        ),
      ),
    );
  }
}
class SwitchAndCheckBoxTestRoute extends StatefulWidget {
  @override
  _SwitchAndCheckBoxTestRouteState createState() => _SwitchAndCheckBoxTestRouteState();
}

class _SwitchAndCheckBoxTestRouteState extends State<SwitchAndCheckBoxTestRoute> {
  bool _switchSelected=true; //维护单选开关状态
  bool _checkboxSelected=true;//维护复选框状态
  @override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
        Switch(
          value: _switchSelected,//当前状态
          activeColor: Colors.lime,
          inactiveThumbColor: Colors.grey,
          activeTrackColor: Colors.deepPurple,
          onChanged:(value){
            //重新构建页面
            setState(() {
              _switchSelected=value;
            });
          },
        ),
        Checkbox(
          value: _checkboxSelected,
          activeColor: Colors.orange, //选中时的颜色
          checkColor: Colors.lightBlue,
          onChanged:(value){
            setState(() {
              _checkboxSelected=value;
            });
          } ,
        )
      ],
    );
  }
}