【自学Flutter】3，0基础android开发

child:

Row(

children: [

Column(

children: [

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.blue,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.fitWidth,

),

),

Text(“fitWidth”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.orange,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.cover,

),

),

Text(“cover”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.red,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.contain,

),

),

Text(“contain”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.yellow,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.fill,

),

),

Text(“fill”),

],

),

Column(

children: [

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.black,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.fitHeight,

),

),

Text(“fitHeight”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.blue,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.scaleDown,

),

),

Text(“scaleDown”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.blue,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.none,

),

),

Text(“none”),

],

),

],

),

)

),

);

}

}

2.解释源代码

import ‘package:flutter/material.dart’;

void main () => runApp(MyApp());

class MyApp extends StatelessWidget{

@override

Widget build(BuildContext context ){

return MaterialApp(

title:‘All Widget Usages’,

home:Scaffold(

body:

Center(

child:

Row(

children: [

Column(

children: [

//容器，相当于div

Container(

//外边距

margin: EdgeInsets.all(10.0),

//宽度

width: 120.0,

//高度

height: 120.0,

//背景颜色

color: Colors.blue,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

//填充样式

fit: BoxFit.fitWidth,

),

),

Text(“fitWidth”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Color

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【docs.qq.com/doc/DSkNLaERkbnFoS0ZF】 完整内容开源分享

s.orange,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.cover,

),

),

Text(“cover”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.red,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.contain,

),

),

Text(“contain”),

Container(

margin: EdgeInsets.all(10.0),

width: 120.0,

height: 120.0,

color: Colors.yellow,

child: Image.network(“https://img.ivsky.com/img/tupian/t/201411/27/weixiao_de_ningmeng_3d_sheji.jpg”,

fit: BoxFit.fill,

),

),

Text(“fill”),