七、动态列表的使用

import 'package:flutter/material.dart';

void main() =>
    runApp(MyApp(items: new List<String>.generate(1000, (i) => "Item $i")));

class MyApp extends StatelessWidget {
  final List<String> items;

  MyApp({Key key, @required this.items}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: "ListViewWidget",
      home: Scaffold(
          appBar: AppBar(
            title: Text(
              "ListViewWidget",
            ),
          ),
          body: new ListView.builder(
            itemCount: items.length,
            itemBuilder: (context, index) {
              return new ListTile(
                title: new Text("${items[index]}"),
              );
            },
          )),
    );
  }
}

class MyList extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView(
      scrollDirection: Axis.horizontal,
      children: <Widget>[
        new Container(
          width: 180.0,
          color: Colors.lightBlue,
        ),
        new Container(
          width: 180.0,
          color: Colors.amber,
        ),
        new Container(
          width: 180.0,
          color: Colors.deepOrange,
        ),
        new Container(
          width: 180.0,
          color: Colors.deepPurpleAccent,
        ),
      ],
    );
  }
}