Flutter利用GridView实现网格的商品布局

GridView.count 生成的是静态网格

效果：

代码：

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("flutter demo"),
        ),
        body: HomeContent(),
      ),
    );
  }
}

class HomeContent extends StatelessWidget {
  HomeContent({Key key}) : super(key: key);
  //动态列表数据：
  List listData=[
    {'title':'001','img':"https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"},
    {'title':'002','img':"https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"},
    {'title':'003','img':"https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"},
    {'title':'004','img':"https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"},
    {'title':'005','img':"https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"},
  ];
  List<Widget> _getListData(){
    //第一种设置数据：
    // List<Widget> list=new List();
    // for(var i=0;i<20;i++){
    //   list.add(Container(
    //     alignment: Alignment.center,
    //     color: Colors.blue,
    //     child: Text("这是第$i 条数据",style: TextStyle(
    //       color: Colors.white,fontSize: 20
    //     )),
    //   ));
    // }
    // return list.toList();

    //第二种设置数据：
    var tempList=listData.map((value){
      return Container(
        child: Column(
          children: <Widget>[
            Image.network(value['img']),
            SizedBox(height: 10),
            Text(value['title'],
            textAlign: TextAlign.center,
            style: TextStyle(
              fontSize: 20
            ),
            )          ],
        ),
        decoration: BoxDecoration(
          border: Border.all(
            color: Color.fromRGBO(233, 233,233, 0.9),
             1
          )
        ),
      );
    });
    return tempList.toList();
  }
  
  @override
  Widget build(BuildContext context) {
    return GridView.count(
      crossAxisSpacing: 20.0, //水平子Widget之间的间距：
      mainAxisSpacing: 20.0, //垂直Widget之间的间距：
      padding: EdgeInsets.all(10),
      crossAxisCount: 3, //一行的Widget数量：
      childAspectRatio: 0.7, //设置宽高比例
      children: this._getListData(),
    );
  }
}

GridView.builder

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("flutter demo"),
        ),
        body: HomeContent(),
      ),
    );
  }
}

class HomeContent extends StatelessWidget {
  HomeContent({Key key}) : super(key: key);
  //动态列表数据：
  List listData = [
    {
      'title': '001',
      'img':
          "https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"
    },
    {
      'title': '002',
      'img':
          "https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"
    },
    {
      'title': '003',
      'img':
          "https://www.itying.com/images/201905/thumb_img/1101_thumb_G_1557845381862.jpg"
    },
  ];
  Widget _getListData(context, index) {
    //第二种设置数据：
    return Container(
      child: Column(
        children: <Widget>[
          Image.network(listData[index]['img']),
          // SizedBox(height: 10),
          Text(
            listData[index]['title'],
            textAlign: TextAlign.center,
            style: TextStyle(fontSize: 20),
          )
        ],
      ),
      decoration: BoxDecoration(
          border:
              Border.all(color: Color.fromRGBO(233, 233, 233, 0.9),  1)),
    );
  }

  @override
  Widget build(BuildContext context) {
    return GridView.builder(
      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisSpacing: 10.0, //水平子Widget之间间距
          mainAxisSpacing: 10.0, //垂直子Widget之间间距
          crossAxisCount: 2 //一行的Widget数量
          ),
      itemCount: listData.length,
      itemBuilder: this._getListData,
    );
  }
}