iapicca

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {

static const String _lorenIpsum = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec iaculis orci vel tempor dignissim. Praesent nisl neque, iaculis et euismod ut, dignissim non arcu. In vel convallis mauris, a viverra turpis. Curabitur ac erat pulvinar, mattis nisl eu, placerat risus. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Duis cursus, nisi eu molestie vulputate, libero tellus convallis purus, id cursus sapien orci at velit. Duis placerat et massa et molestie. Quisque id elit blandit, tempor nulla non, faucibus ex. Pellentesque elementum cursus neque, vitae ultricies massa molestie nec. Morbi a eros finibus, sagittis mi eget, gravida.';

@override
  Widget build(BuildContext context) => Scaffold(

iapicca

const Duration _duration = Duration(seconds:1); 
const List<String> _list = ['1','2','3','4','5',];
Future<void> _printDelayed(String string) async {
  await Future.delayed(_duration);
  print(string);
}

void main() async {  
  _list.forEach((s) async => await _printDelayed(s));
  await Future.delayed(_duration*2);

iapicca

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) => MaterialApp(
    home: MyHomePage(),
  );

iapicca

import 'package:flutter/material.dart';

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

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

iapicca

import 'package:flutter/material.dart';

void main() => runApp(MyApp(),);

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

  ThemeData _theme1 =  ThemeData(buttonTheme: ButtonThemeData(textTheme: ButtonTextTheme.normal,),);

iapicca

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

void main() {
  timeDilation = 3.0;
  runApp(MaterialApp(home: MyHomePage()));
}

class MyHomePage extends StatefulWidget {
  @override

iapicca

import "package:flutter/material.dart";

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with SingleTickerProviderStateMixin {

iapicca

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp>{

iapicca

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyApp createState() => _MyApp();
}

class _MyApp extends State<MyApp> with WidgetsBindingObserver{

iapicca

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

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

class MyApp extends StatefulWidget {
  @override
  _MyApp createState() => _MyApp();
}