Flutter中ListView 的使用示例

import 'dart:convert';import 'package:http/http.dart' as http;import 'package:flutter/material.dart';import 'package:flutter/cupertino.dart';

loadData() async { String loadRUL = "https://api.douban.com/v2/movie/in_theaters"; http.Response response = await http.get(loadRUL); var result = json.decode(response.body); setState(() {  print('title: $title');  subjects = result['subjects']; }); }

getBody() { if (subjects.length != 0) {  return ListView.builder(   itemCount: subjects.length,   itemBuilder: (BuildContext context, int position) {   return getItem(subjects[position]);   }); } else {  // 加载菊花  return CupertinoActivityIndicator(); } }

getItem(var subject) {// 演员列表 var avatars = List.generate(subject['casts'].length, (int index) =>  Container(   margin: EdgeInsets.only(left: index.toDouble() == 0.0 ? 0.0 : 16.0),   child: CircleAvatar(    backgroundColor: Colors.white10,    backgroundImage: NetworkImage(     subject['casts'][index]['avatars']['small']    )   ),  ), ); var row = Container(  margin: EdgeInsets.all(4.0),  child: Row(  children: <Widget>[   ClipRRect(   borderRadius: BorderRadius.circular(4.0),   child: Image.network(    subject['images']['large'],    width: 100.0, height: 150.0,    fit: BoxFit.fill,   ),   ),   Expanded(    child: Container(    margin: EdgeInsets.only(left: 8.0),    height: 150.0,    child: Column(     crossAxisAlignment: CrossAxisAlignment.start,     children: <Widget>[//     电影名称     Text(      subject['title'],      style: TextStyle(      fontWeight: FontWeight.bold,      fontSize: 20.0,      ),      maxLines: 1,     ),//     豆瓣评分     Text(      '豆瓣评分：${subject['rating']['average']}',      style: TextStyle(       fontSize: 16.0      ),     ),//     类型     Text(      "类型：${subject['genres'].join("、")}"     ),//     导演     Text(      '导演：${subject['directors'][0]['name']}'     ),//     演员     Container(      margin: EdgeInsets.only(top: 8.0),      child: Row(      children: <Widget>[       Text('主演：'),       Row(       children: avatars,       )      ],      ),     )     ],    ),    )   )  ],  ), ); return Card(  child: row, ); }