flutter dialog junk

gistfile1.txt

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() async {
  runApp(MyApp());
  await Future.delayed(Duration(seconds: 5));
  runApp(MyApp2());
}

class MyApp2 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.red,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Directionality(
      textDirection: TextDirection.ltr,
      child: Stack(
        children: [
          MaterialApp(
            title: 'Flutter Demo',
            theme: ThemeData(
              primarySwatch: Colors.blue,
              visualDensity: VisualDensity.adaptivePlatformDensity,
            ),
            home: MyHomePage(title: 'Flutter Demo Home Page'),
          ),
          Container(
            color: Colors.redAccent,
          )
        ],
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  void initState() {
    Future.delayed(Duration(seconds: 2), () {
      showCupertinoDialog(
          context: context,
          builder: (_) {
            return CupertinoAlertDialog(
              title: Text('123456789'),
              content: Container(
                width: 100,
                height: 100,
                color: Colors.red,
              ),
              actions: [
                CupertinoDialogAction(
                  child: Text('pop'),
                  onPressed: () {
                    Navigator.of(context).pop();
                  },
                )
              ],
            );
          });
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(),
      floatingActionButton: FloatingActionButton(
        onPressed: () {},
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}