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import 'package:flutter/material.dart';import 'expansion_tile_demo.dart';main(){ runApp(MyApp());}class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData.dark(), home: ExpansionTileDemo() ); }}
import 'package:flutter/material.dart';class ExpansionTileDemo extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(title: Text('Expansion Tile Demo')), body: Center( child: ExpansionTile( title: Text('Expansion Tile '), // 放开始的组件 leading: Icon(Icons.ac_unit), // 设置点开后的背景颜色 backgroundColor: Colors.white24, // 设置展开显示的内容 children:[ ListTile( title: Text('List title'), subtitle: Text('Subtitle'), ) ], // 第一次显示打开的状态 //initiallyExpanded: true, ), ), ); }}
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