效果图

TryEnough

代码

import 'package:flutter/material.dart';
// Uncomment lines 7 and 10 to view the visual layout at runtime.
import 'package:flutter/rendering.dart' show debugPaintSizeEnabled;

void main() {
  debugPaintSizeEnabled = true;
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

//创建图片的list
List<Container> _buildGridTileList(int count) {
  List<Container> containers = List<Container>.generate(
  count,
  (int index) =>
  Container(child: Image.asset('images/timg.jpeg')));
  return containers;
}

//创建gridview
Widget buildGrid() {
  return GridView.extent(
      maxCrossAxisExtent: 150.0,
      padding: const EdgeInsets.all(4.0),
      mainAxisSpacing: 4.0,
      crossAxisSpacing: 4.0,
      children: _buildGridTileList(30));
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: buildGrid(),
      ),
    );
  }
}