Flutter Boiler Code

Standard Code für neue Projekte in Flutter

Basis: Visual Studio Code:

	import 'package:flutter/material.dart';
	void main() => runApp(MyApp());
	class MyApp extends StatelessWidget {
	// This widget is the root of your application.
	@override
	Widget build(BuildContext context) {
	return MaterialApp(
	title: 'Flutter Demo',
	theme: ThemeData(
	// This is the theme of your application.
	//
	// Try running your application with "flutter run". You'll see the
	// application has a blue toolbar. Then, without quitting the app, try
	// changing the primarySwatch below to Colors.green and then invoke
	// "hot reload" (press "r" in the console where you ran "flutter run",
	// or simply save your changes to "hot reload" in a Flutter IDE).
	// Notice that the counter didn't reset back to zero; the application
	// is not restarted.
	primarySwatch: Colors.blue,
	),
	home: MyHomePage(title: 'Flutter Demo Home Page'),
	);
	}
	}
	class MyHomePage extends StatefulWidget {
	MyHomePage({Key key, this.title}) : super(key: key);
	// This widget is the home page of your application. It is stateful, meaning
	// that it has a State object (defined below) that contains fields that affect
	// how it looks.
	// This class is the configuration for the state. It holds the values (in this
	// case the title) provided by the parent (in this case the App widget) and
	// used by the build method of the State. Fields in a Widget subclass are
	// always marked "final".
	final String title;
	@override
	_MyHomePageState createState() => _MyHomePageState();
	}
	class _MyHomePageState extends State<MyHomePage> {
	int _counter = 0;
	void _incrementCounter() {
	setState(() {
	// This call to setState tells the Flutter framework that something has
	// changed in this State, which causes it to rerun the build method below
	// so that the display can reflect the updated values. If we changed
	// _counter without calling setState(), then the build method would not be
	// called again, and so nothing would appear to happen.
	_counter++;
	});
	}
	@override
	Widget build(BuildContext context) {
	// This method is rerun every time setState is called, for instance as done
	// by the _incrementCounter method above.
	//
	// The Flutter framework has been optimized to make rerunning build methods
	// fast, so that you can just rebuild anything that needs updating rather
	// than having to individually change instances of widgets.
	return Scaffold(
	appBar: AppBar(
	// Here we take the value from the MyHomePage object that was created by
	// the App.build method, and use it to set our appbar title.
	title: Text(widget.title),
	),
	body: Center(
	// Center is a layout widget. It takes a single child and positions it
	// in the middle of the parent.
	child: Column(
	// Column is also layout widget. It takes a list of children and
	// arranges them vertically. By default, it sizes itself to fit its
	// children horizontally, and tries to be as tall as its parent.
	//
	// Invoke "debug painting" (press "p" in the console, choose the
	// "Toggle Debug Paint" action from the Flutter Inspector in Android
	// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
	// to see the wireframe for each widget.
	//
	// Column has various properties to control how it sizes itself and
	// how it positions its children. Here we use mainAxisAlignment to
	// center the children vertically; the main axis here is the vertical
	// axis because Columns are vertical (the cross axis would be
	// horizontal).
	mainAxisAlignment: MainAxisAlignment.center,
	children: <Widget>[
	Text(
	'You have pushed the button this many times:',
	),
	Text(
	'$_counter',
	style: Theme.of(context).textTheme.display1,
	),
	],
	),
	),
	floatingActionButton: FloatingActionButton(
	onPressed: _incrementCounter,
	tooltip: 'Increment',
	child: Icon(Icons.add),
	), // This trailing comma makes auto-formatting nicer for build methods.
	);
	}
	}

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