Tugas Minggu 12 PPB I

Nama    : Tegar Ganang Satrio Priambodo

NRP       : 5025201002

Kelas     : PPB I

Membuat Aplikasi Namer App dengan Flutter

Minggu ini, akan menggunakan environment baru untuk membuat aplikasi dengan Flutter. Flutter dapat dijalankan pada perangkat apapun sehingga dikenal sebagai framework multiplatform karena keandalannya untuk dijalankan pada website, android maupun iOS. Kali ini kita akan membuat sebuah aplikasi Namer App yang menampilkan nama random dan like.

Berikut merupakan kode sumber untuk aplikasi Namer App

	import 'package:english_words/english_words.dart';
	import 'package:flutter/material.dart';
	import 'package:provider/provider.dart';
	void main() {
	runApp(MyApp());
	}
	class MyApp extends StatelessWidget {
	const MyApp({super.key});
	@override
	Widget build(BuildContext context) {
	return ChangeNotifierProvider(
	create: (context) => MyAppState(),
	child: MaterialApp(
	title: 'Namer App',
	theme: ThemeData(
	useMaterial3: true,
	colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepOrange),
	),
	home: MyHomePage(),
	),
	);
	}
	}
	class MyAppState extends ChangeNotifier {
	var current = WordPair.random();
	void getNext() {
	current = WordPair.random();
	notifyListeners();
	}
	var favorites = <WordPair>[];
	void toggleFavorite() {
	if (favorites.contains(current)) {
	favorites.remove(current);
	} else {
	favorites.add(current);
	}
	notifyListeners();
	}
	}
	class MyHomePage extends StatefulWidget {
	@override
	State<MyHomePage> createState() => _MyHomePageState();
	}
	class _MyHomePageState extends State<MyHomePage> {
	var selectedIndex = 0;
	@override
	Widget build(BuildContext context) {
	Widget page;
	switch (selectedIndex) {
	case 0:
	page = GeneratorPage();
	break;
	case 1:
	page = FavoritesPage();
	break;
	default:
	throw UnimplementedError('no widget for $selectedIndex');
	}
	return LayoutBuilder(builder: (context, constraints) {
	return Scaffold(
	body: Row(
	children: [
	SafeArea(
	child: NavigationRail(
	extended: constraints.maxWidth >= 600,
	destinations: [
	NavigationRailDestination(
	icon: Icon(Icons.home),
	label: Text('Home'),
	),
	NavigationRailDestination(
	icon: Icon(Icons.favorite),
	label: Text('Favorites'),
	),
	],
	selectedIndex: selectedIndex,
	onDestinationSelected: (value) {
	setState(() {
	selectedIndex = value;
	});
	},
	),
	),
	Expanded(
	child: Container(
	color: Theme.of(context).colorScheme.primaryContainer,
	child: page,
	),
	),
	],
	),
	);
	});
	}
	}
	class GeneratorPage extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	var appState = context.watch<MyAppState>();
	var pair = appState.current;
	IconData icon;
	if (appState.favorites.contains(pair)) {
	icon = Icons.favorite;
	} else {
	icon = Icons.favorite_border;
	}
	return Center(
	child: Column(
	mainAxisAlignment: MainAxisAlignment.center,
	children: [
	BigCard(pair: pair),
	SizedBox(height: 10),
	Row(
	mainAxisSize: MainAxisSize.min,
	children: [
	ElevatedButton.icon(
	onPressed: () {
	appState.toggleFavorite();
	},
	icon: Icon(icon),
	label: Text('Like'),
	),
	SizedBox(width: 10),
	ElevatedButton(
	onPressed: () {
	appState.getNext();
	},
	child: Text('Next'),
	),
	],
	),
	],
	),
	);
	}
	}
	class BigCard extends StatelessWidget {
	const BigCard({
	super.key,
	required this.pair,
	});
	final WordPair pair;
	@override
	Widget build(BuildContext context) {
	final theme = Theme.of(context);
	final style = theme.textTheme.displayMedium!.copyWith(
	color: theme.colorScheme.onPrimary,
	);
	return Card(
	color: theme.colorScheme.primary,
	child: Padding(
	padding: const EdgeInsets.all(20),
	child: Text(
	pair.asLowerCase,
	style: style,
	semanticsLabel: "${pair.first} ${pair.second}",
	),
	),
	);
	}
	}
	class FavoritesPage extends StatelessWidget {
	@override
	Widget build(BuildContext context) {
	var appState = context.watch<MyAppState>();
	if (appState.favorites.isEmpty) {
	return Center(
	child: Text('No favorites yet.'),
	);
	}
	return ListView(
	children: [
	Padding(
	padding: const EdgeInsets.all(20),
	child: Text('You have '
	'${appState.favorites.length} favorites:'),
	),
	for (var pair in appState.favorites)
	ListTile(
	leading: Icon(Icons.favorite),
	title: Text(pair.asLowerCase),
	),
	],
	);
	}
	}

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