[Flutter翻译]GSoC ‘21：为Flutter创建一个桌面样本_flutter 桌面模板

import 'package:flutter/material.dart';
 
void main() {
  runApp(const MyApp());
}
 
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
 
  // 此处省略了MaterialApp的其他属性设置
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: const HomePage(), // 使用HomePage作为根页面
    );
  }
}
 
class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);
 
  @override
  _HomePageState createState() => _HomePageState();
}
 
class _HomePageState extends State<HomePage> {
  int _counter = 0;
 
  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }
 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Sample App'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

这个代码示例展示了如何在Flutter中创建一个简单的计数器应用，它遵循了Flutter的桌面应用开发规范。代码中使用了StatefulWidget和State来管理应用状态，这是Flutter开发中推荐的做法。同时，代码示例中也展示了如何使用Scaffold、AppBar、FloatingActionButton等常用的组件来构建应用的UI。