探索Flutter的魅力：深入浅出Flutter_learn_demo项目

import 'package:flutter/material.dart';
 
void main() => runApp(MyApp());
 
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}
 
class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Demo HomePage'),
      ),
      body: Center(
        child: Text('You have pushed the button this many times:'),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {},
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

这段代码是一个简单的Flutter应用程序，展示了如何使用Flutter创建一个包含AppBar、文本、浮动动作按钮的基本页面。它是学习Flutter的一个很好的起点，并展示了Flutter的基本结构和Widget的使用方法。