■ DropdownButton 클래스를 사용하는 방법을 보여준다.
▶ main.dart
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import 'package:flutter/material.dart'; void main() { runApp(TestApplication()); } class TestApplication extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Test Application', theme: ThemeData( primarySwatch: Colors.blue, ), home: MainPage(), ); } } class MainPage extends StatefulWidget { @override _MainPageState createState() => _MainPageState(); } class _MainPageState extends State<MainPage> { final List<String> _valueList = ['서울', '인천', '수원', '대전', '대구', '광주', '부산']; String _selectedValue = '수원'; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Test Application'), ), body: Align( alignment: Alignment.center, child: DropdownButton( value: _selectedValue, items: _valueList.map((value) { return DropdownMenuItem( value: value, child: Text(value), ); }).toList(), onChanged: (value) { setState(() { _selectedValue = value; }); }, ), ), ); } } |
