Flutter:更改列表中类的按钮按下时的颜色

class Item {
  String name;
  bool isButtonPressed;

  Item({this.name, this.isButtonPressed = false});
}

class ItemWidget extends StatefulWidget {
  final Item item;

  ItemWidget({Key key, this.item}) : super(key: key);

  @override
  _ItemWidgetState createState() => _ItemWidgetState();
}

class _ItemWidgetState extends State<ItemWidget> {
  @override
  Widget build(BuildContext context) {
    return ListTile(
      title: Text(widget.item.name),
      trailing: GestureDetector(
        onTap: () {
          setState(() {
            widget.item.isButtonPressed = !widget.item.isButtonPressed;
          });
        },
        child: Container(
          width: 24,
          height: 24,
          decoration: BoxDecoration(
            shape: BoxShape.circle,
            color: widget.item.isButtonPressed ? Colors.blue : Colors.grey,
          ),
        ),
      ),
    );
  }
}

class MyApp extends StatelessWidget {
  final List<Item> items = [
    Item(name: 'Item 1'),
    Item(name: 'Item 2'),
    Item(name: 'Item 3'),
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Flutter Demo')),
        body: ListView.builder(
          itemCount: items.length,
          itemBuilder: (context, index) {
            return ItemWidget(item: items[index]);
          },
        ),
      ),
    );
  }
}

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