//flutter
import 'package:flutter/material.dart';

void main() {
  return runApp(TestPage());
}

//リスト4.26
class TestPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'ListView',
      home: Scaffold(
        appBar: AppBar(title: Text('ListView')),
        body: HogeListWidget()
      )
    );
  }
}

class HogeListWidget extends StatefulWidget {
  @override
  State<HogeListWidget> createState() => _HogeListWidgetState();
}

class _HogeListWidgetState extends State<HogeListWidget> {
  final itemList = List.generate(500, (i) => 'Item$i');

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: itemList.length,
      itemBuilder: (context, index) {
        return Text(itemList[index]);
      }
    );
  }
}