main.dart
void main() => runApp(DemoApp()); class DemoApp extends StatelessWidget { const DemoApp(); @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar( title: const Text("Swipe to delete"), ), body: const Center( child: SwipeItems(), ) ), ); } }
swipelist_provider.dart
class SourceList with ChangeNotifier { final _myList = List<String>.generate(10, (i) { return "Number $i"; }); List<String> get values => UnmodifiableListView(_myList); void removeItem(int index) { _myList.removeAt(index); notifyListeners(); } }
swipe_items.dart
class SwipeItems extends StatelessWidget { const SwipeItems(); @override Widget build(BuildContext context) { return Consumer<SourceList>( builder: (context, list, _) { return ListView.builder( itemCount: list.values.length, itemBuilder: (context, index) { var item = list.values[index]; return Dismissible( key: Key(item), background: Container( color: Colors.redAccent, ), onDismissed: (direction) { list.removeItem(index); }, direction: DismissDirection.startToEnd, confirmDismiss: (direction) => _getConfirm(context, direction), child: ListTile( leading: const Icon(Icons.trending_flat), title: Text(item), ), ); }, ); }, ); } Future<bool> _getConfirm(BuildContext context, DismissDirection direction) { return showDialog<bool>( context: context, barrierDismissible: false, // user must tap button! builder: (BuildContext context) { return AlertDialog( title: const Text("Confirm"), content: const Text("Do you really want to delete this item?"), actions: <Widget>[ RaisedButton( child: Text("Nope"), color: Colors.blueAccent, onPressed: () { Navigator.of(context)?.pop(false); }, ), FlatButton( child: Text("Yes"), onPressed: () { Navigator.of(context)?.pop(true); }, ), ], ); }, ); } }
swipelist_provider.dart
class DismissBackground extends StatelessWidget { const DismissBackground(); @override Widget build(BuildContext context) { return Container( color: Colors.redAccent, ); } }
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