Stack 层叠定位布局

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      title: "Stack 层叠定位布局示例",
      home: MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Stack 层叠定位布局"),
      ),
      body: Center(
        child: Stack(
          children: <Widget>[
            Image.network('https://static.lidong.me/upload/XjGwvaVAI.png'),
            Positioned(
              bottom: 50.0,
              right: 50.0,
              child: Text(
                "Hi Flutter",
                style: TextStyle(
                  fontSize: 36.0,
                  fontWeight: FontWeight.bold,
                  fontFamily: "serilf",
                  color: Colors.blueGrey,
                ),
              ),
            )
          ],
        ),
      ),
    );
  }
}