Flutter如何在Listview builder中使用查询快照中应用搜索过滤器

import 'package:flutter/material.dart';

class MyListView extends StatefulWidget {
  @override
  _MyListViewState createState() => _MyListViewState();
}

class _MyListViewState extends State<MyListView> {
  List<String> data = [
    'Apple',
    'Banana',
    'Cherry',
    'Durian',
    'Grape',
    'Lemon',
    'Orange',
    'Peach',
    'Strawberry',
    'Watermelon',
  ];

  String filter = '';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('ListView with Search Filter'),
      ),
      body: Column(
        children: [
          TextField(
            onChanged: (value) {
              setState(() {
                filter = value.toLowerCase();
              });
            },
            decoration: InputDecoration(
              labelText: 'Search',
            ),
          ),
          Expanded(
            child: ListView.builder(
              itemCount: data.length,
              itemBuilder: (context, index) {
                final item = data[index];
                if (filter.isNotEmpty && !item.toLowerCase().contains(filter)) {
                  return Container(); // 返回一个空容器，表示不显示该项
                }
                return ListTile(
                  title: Text(item),
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: MyListView(),
  ));
}