先上图： <code>import &#039;package:flutter/material.dart&#039;; main(){ runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return const MaterialApp…

先上图： <code>import &#039;package:flutter/material.dart&#039;; main(){ runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return const MaterialApp…

效果： 代码： <code>import &#039;package:flutter/material.dart&#039;; main(){ runApp(MaterialApp( debugShowCheckedModeBanner: false, home: Scaffold( appBar: AppBar( title:const Text(&quot;这是我的第一个程序&quot;), centerTitle:true ), body: const Center…