Official example:
import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
final ThemeData theme = ThemeData();
return MaterialApp(
title: 'Startup Name Generator',
theme: theme.copyWith(
colorScheme: theme.colorScheme.copyWith(
primary: Colors.white, // appbar背景颜色
onPrimary: Colors.black, // appbar 文字颜色
brightness: Brightness.light
),
),
home: const RandomWords(),
);
}
}
class RandomWords extends StatefulWidget {
const RandomWords({super.key});
@override
State createState() {
return _RandomWordsState();
}
}
class _RandomWordsState extends State<RandomWords> {
final List<WordPair> _suggestions = <WordPair>[];
final TextStyle _biggerFont = const TextStyle(fontSize: 18);
final Set<WordPair> _saved = <WordPair>{};
Widget _buildRow(WordPair pair) {
final bool alreadySaved = _saved.contains(pair);
return ListTile(
title: Text(
pair.asPascalCase,
style: _biggerFont,
),
trailing: Icon(
alreadySaved ? Icons.favorite : Icons.favorite_border,
color: alreadySaved ? Colors.red : null,
),
onTap: () {
setState(() {
if (alreadySaved) {
_saved.remove(pair);
} else {
_saved.add(pair);
}
});
});
}
@override
Widget build(BuildContext context) {
// final wordPair = WordPair.random();
// return Text(wordPair.asPascalCase);
return Scaffold(
appBar: AppBar(
title: const Text('Startup Name Generator'),
actions: <Widget>[
IconButton(onPressed: _pushSaved, icon: const Icon(Icons.list))
],
),
body: _buildSuggestions(),
);
}
void _pushSaved() {
Navigator.of(context).push(
MaterialPageRoute<void>(
builder: (BuildContext context) {
final Iterable<ListTile> tiles = _saved.map(
(WordPair e) {
return ListTile(
title: Text(
e.asPascalCase,
style: _biggerFont,
),
);
},
);
final List<Widget> divided =
ListTile.divideTiles(context: context, tiles: tiles).toList();
return Scaffold(
appBar: AppBar(
title: const Text('Saved Suggestions'),
),
body: ListView(children: divided),
);
},
),
);
}
Widget _buildSuggestions() {
return ListView.builder(
padding: const EdgeInsets.all(16.0),
itemBuilder: (context, i) {
if (i.isOdd) return const Divider();
final index = i ~/ 2;
if (index >= _suggestions.length) {
_suggestions.addAll(generateWordPairs().take(10));
}
// _suggestions.sort((a, b) => Random().nextInt(2));
return _buildRow(_suggestions[index]);
});
}
}
Some changes to note:
@override
Widget build(BuildContext context) {
final ThemeData theme = ThemeData();
return MaterialApp(
title: 'Startup Name Generator',
theme: theme.copyWith(
colorScheme: theme.colorScheme.copyWith(
primary: Colors.white, // appbar背景颜色
onPrimary: Colors.black, // appbar 文字颜色
brightness: Brightness.light
),
),
home: const RandomWords(),
);
}