Flutter布局之图片圆角画廊

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教程推荐

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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; //分析 1
  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();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    var container = Container(
      decoration: BoxDecoration(
        color: Colors.black26,
      ),
      child: Column(  //分析 2
        children: [
          Row(
            children: [
              Expanded(
                child: Container(
                  decoration: BoxDecoration(  // 分析 3
                    border: Border.all(width: 5.0, color: Colors.black),
                    borderRadius:
                    const BorderRadius.all(const Radius.circular(8.0)),
                  ),
                  margin: const EdgeInsets.all(4.0),
                  child: Image.asset('images/timg.jpeg'),
                ),
              ),
              Expanded(
                child: Container(
                  decoration: BoxDecoration(
                    border: Border.all(width: 10.0, color: Colors.black38),
                    borderRadius:
                    const BorderRadius.all(const Radius.circular(0.0)),
                  ),
                  margin: const EdgeInsets.all(4.0),
                  child: Image.asset('images/timg.jpeg'),
                ),
              ),
            ],
          ),
          Row(
            children: [
              Expanded(
                child: Container(
                  decoration: BoxDecoration(
                    border: Border.all(width: 10.0, color: Colors.red),
                    borderRadius:
                    const BorderRadius.all(const Radius.circular(8.0)),
                  ),
                  margin: const EdgeInsets.all(4.0),
                  child: Image.asset('images/timg.jpeg'),
                ),
              ),
              Expanded(
                child: Container(
                  decoration: BoxDecoration(
                    border: Border.all(width: 10.0, color: Colors.black38),
                    borderRadius:
                    const BorderRadius.all(const Radius.circular(8.0)),
                  ),
                  margin: const EdgeInsets.all(16.0),
                  child: Image.asset('images/timg.jpeg'),
                ),
              ),
            ],
          ),
        ],
      ),
    );

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: container,
      ),
    );
  }
}

分析

• 分析1:
  开启调试模式

• 分析2
  四张图片放在一个column的children中，分为两行，每行再添加两个container

• 分析3
  添加边框，设置边框的颜色和宽度