完整单页记录

import 'package:flutter/material.dart';

void main() {
  runApp(new MyApp());
}
class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Generated App',
      theme: new ThemeData(
        primarySwatch: Colors.red,
        primaryColor: const Color(0xFFf44336),
        accentColor: const Color(0xFFf44336),
        canvasColor: const Color(0xFFfafafa),
        fontFamily: 'Roboto',
      ),
      home: new MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key}) : super(key: key);
  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('微升'),
      ),
      bottomNavigationBar: new BottomNavigationBar(
          items: <BottomNavigationBarItem>[
            BottomNavigationBarItem(icon: Icon(Icons.fiber_new,), title: Text('信息'),),
            BottomNavigationBarItem(icon: Icon(Icons.live_tv,), title: Text('视频'),),
            BottomNavigationBarItem(icon: Icon(Icons.phone_in_talk,), title: Text('聊天'),),
          ]
      ),
    );
  }
}