单独一个复选框（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('checkboxDemo'),
        elevation: 0,
      ),
      body: Container(
        padding: EdgeInsets.all(16),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Checkbox(
                  value: _checkboxItemA,
                  onChanged: (value) {
                    setState(() {
                      _checkboxItemA = value;
                    });
                  },
                  activeColor: Colors.green, // 激活的颜色，默认为Theme的accentColor
                ),
              ],
            )
          ],
        ),
      ),
    );
  }
}

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图标、文字和复选框（CheckBoxListTile）

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('checkboxDemo'),
        elevation: 0,
      ),
      body: Container(
        padding: EdgeInsets.all(16),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            CheckboxListTile(
              value: _checkboxItemA,
              onChanged: (value) {
                setState(() {
                  _checkboxItemA = value;
                });
              },
              title: Text('Checkbox Item A'),
              subtitle: Text('Description'), // 副标题
              secondary: Icon(Icons.bookmark),
              selected: _checkboxItemA, // 设置图标和文字是否是激活状态，如果是true，则图标和文字均改变颜色
            ),
          ],
        ),
      ),
    );
  }
}

预览