设置主页

main.dart

import 'package:flutter/material.dart';

void main() => runApp(new MaterialApp(
      home: MyApp(),
    ));

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: MyHomePage(),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("MaterialApp示例"),
      ),
      body: Center(
        child: Text(
          "主页",
          style: TextStyle(fontSize: 28.0),
        ),
      ),
    );
  }
}