Section 1 $ flutter doctor

Section 2 | Flutter (Channel beta, v0.1.5, on Mac OS X 10.12.6 16G1212) | Android toolchain - develop for Android devices (Android SDK 27.0.2) | iOS toolchain - develop for iOS devices (Xcode 9.2) | Android Studio (version 3.0) | IntelliJ IDEA Community Edition (version 2017.1.3) | Connected devices (2 available)

Section 3 $ flutter create flutter_hello_world

Section 4 flutter_hello_world android ios lib main.dart test

Section 5 import 'package:flutter/material.dart'; void main() => runApp(new HelloWorldApp()); class HelloWorldApp extends StatelessWidget { @override Widget build(BuildContext context) { return new MaterialApp( home: new Material( child: new Center( child: new Text("Hello world!"), ), ), ); } }

Section 6 $ flutter run $ flutter run -d DEVICE_ID $ flutter run -d all