Flutter 相对布局实现：Stack 加上Align

 

import 'package:flutter/material.dart';

/// 使用 MediaQuery 进行全面屏适配
void main() {
  runApp(HomePage());
}

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

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    /// 获取当前的 padding 信息

    return Container(
      width: 500,
      height: 45,
      color: Colors.yellow,
      child: Stack(
        children: <Widget>[
          Align(
            alignment: Alignment(-0.9, 0),
            child: Icon(
              Icons.card_travel,
              size: 80,
              color: Colors.green,
            ),
          ),
          Align(
            alignment: Alignment(-0.5, -0.2),
            child: Icon(
              Icons.card_travel,
              size: 80,
              color: Colors.pink,
            ),
          ),
          Align(
            alignment: Alignment(-0.5, 0),
            child: Icon(
              Icons.card_travel,
              size: 80,
              color: Colors.black,
            ),
          ),
        ],
      ),
    );
  }
}