第一个Flutter页面里的main函数

笔者左右无法肉眼识别哪些是系统生成的，哪些是需要开发者手写的，只有在最初的阶段通过加强多写页面来形成肌肉记忆了。下述是main函数的

import 'package:exercise_home_page/app_center.dart';

import 'package:flutter/material.dart';

import 'home_page.dart';

import 'message_center.dart';

void main() {

runApp(const MyApp());

}

class MyApp extends StatelessWidget {

const MyApp({super.key});

// This widget is the root of your application.

@override

Widget build(BuildContext context) {

return MaterialApp(

title: 'Flutter Demo',

theme: ThemeData(

colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),

useMaterial3: true,

),

home: MessageCenter(),

);

}

}

import 'package:flutter/material.dart';

class MessageCenter extends StatefulWidget

{

const MessageCenter({super.key});

@override

State createState() {

return _State();

}

}

class _State extends State

{

@override

Widget build(BuildContext context) {

return Container(

color: Colors.orange,

);

}

}