Flutter如何更改ListTile中选定磁贴的背景颜色

import 'package:flutter/material.dart';

class MyListTile extends StatefulWidget {
  final String title;
  final String subtitle;

  MyListTile({required this.title, required this.subtitle});

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

class _MyListTileState extends State<MyListTile> {
  bool _selected = false;

  void _onTap() {
    setState(() {
      _selected = !_selected;
    });
  }

  @override
  Widget build(BuildContext context) {
    Color backgroundColor = _selected ? Colors.blue : Colors.white;

    return ListTile(
      title: Text(widget.title),
      subtitle: Text(widget.subtitle),
      onTap: _onTap,
      tileColor: backgroundColor,
    );
  }
}

// 使用MyListTile
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('My App')),
        body: ListView(
          children: [
            MyListTile(
              title: 'Item 1',
              subtitle: 'Subtitle 1',
            ),
            MyListTile(
              title: 'Item 2',
              subtitle: 'Subtitle 2',
            ),
            MyListTile(
              title: 'Item 3',
              subtitle: 'Subtitle 3',
            ),
          ],
        ),
      ),
    );
  }
}

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