flutter复选框checkbox

class CheckboxDemo extends StatefulWidget {
  @override
  _CheckboxDemoState createState() => _CheckboxDemoState();
}

class _CheckboxDemoState extends State<CheckboxDemo> {
  bool _checkboxItemA = true;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Checkbox'), elevation: 0.0,),
      body: Container(
        padding: EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            CheckboxListTile( // 带标签和图标的复选框
              value: _checkboxItemA,
              onChanged: (value) {
                setState(() {
                  _checkboxItemA = value;
                });
              },
              title: Text('Checkbox Item A'),
              subtitle: Text('Description'),
              secondary: Icon(Icons.bookmark), // 图标
              selected:  _checkboxItemA, // 控制标题和图标是否使用激活状态的颜色
            ),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Checkbox( // 复选框
                  value: _checkboxItemA, // 复选框的值
                  onChanged: (value) { // 点按复选框的处理方法
                    setState(() {
                      _checkboxItemA = value;
                    });
                  },
                  activeColor: Colors.blue, // 勾选状态下复选框的颜色
                )
              ],
            )
          ],
        ),
      ),
    );
  }
}