**Merhaba,
ListView.builder içerisindeki ExpansionTile kullanıyorum. Ekranda bir tanesini açtığımda aşağıya kaydırdığım zaman geri kalanlar da kendi kendine açılıyor ve sonra da hata fırlatıyor.
Kdolar;**
@override
Widget build(BuildContext context) {
return ChangeNotifierProvider<HomeModel>(
create: (context) => locator<HomeModel>(),
child: Consumer<HomeModel>(
builder: (context, model, child) =>
model.state == ViewState.girisSonucLoadingState
? Center(
child: CircularProgressIndicator(
backgroundColor: Colors.white,
),
)
: ListView.builder(
itemCount: 10,
itemBuilder: (context, index) {
return ExpansionTile(
subtitle: Text("Ad Soyad "+index.toString()),
title: Text("Şube :"+index.toString()),
children: <Widget>[
Container(
padding: EdgeInsets.all(4),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Column(
children: <Widget>[
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
"Ad Soyad "+index.toString(),
style: TextStyle(
fontWeight: FontWeight.w700,
fontSize: 14),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
"Şube "+index.toString(),
style: TextStyle(
fontWeight: FontWeight.w700,
fontSize: 14),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
"Bölüm "+index.toString(),
style: TextStyle(
fontWeight: FontWeight.w700,
fontSize: 14),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text(
"Tel "+index.toString(),
style: TextStyle(
fontWeight: FontWeight.w700,
fontSize: 14),
),
),
],
),
],
),
ButtonBar(
alignment: MainAxisAlignment.end,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
RaisedButton(
// borderSide: BorderSide(
// color: Colors.red),
onPressed: () {},
color: Colors.white,
child: Text(
"SİL",
style: TextStyle(
color: Colors.red,
fontSize: 16,
fontWeight: FontWeight.w700),
)),
RaisedButton(
// borderSide: BorderSide(
// color: Colors.green),
onPressed: () {
Navigator.of(context).push(MaterialPageRoute(
builder: (context) => DanismanGuncelle()));
},
color: Colors.white,
child: Text(
"GÜNCELLE",
style: TextStyle(
color: Colors.green,
fontSize: 16,
fontWeight: FontWeight.w700),
)),
],
),
],
),
),
],
);
}),
),
);
}
}
**Oluşan Hata şu şekilde ; **
════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
The following _CastError was thrown building NotificationListener<KeepAliveNotification>:
type 'double' is not a subtype of type 'bool' in type cast
The relevant error-causing widget was:
ListView file:///C:/Users/gmh/AndroidStudioProjects/flutter_app/app/lib/views/danisman_listesi.dart:37:24
When the exception was thrown, this was the stack:
#0 _ExpansionTileState.initState (package:flutter/src/material/expansion_tile.dart:118:63)
#1 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4640:58)
#2 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4476:5)
... Normal element mounting (33 frames)
#35 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3446:14)
...
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
'package:flutter/src/rendering/sliver_multi_box_adaptor.dart': Failed assertion: line 263 pos 16: 'child == null || indexOf(child) > index': is not true.
The relevant error-causing widget was:
ListView file:///C:/Users/gmh/AndroidStudioProjects/flutter_app/app/lib/views/danisman_listesi.dart:37:24
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
'package:flutter/src/rendering/sliver_multi_box_adaptor.dart': Failed assertion: line 263 pos 16: 'child == null || indexOf(child) > index': is not true.
The relevant error-causing widget was:
ListView file:///C:/Users/gmh/AndroidStudioProjects/flutter_app/app/lib/views/danisman_listesi.dart:37:24
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
'package:flutter/src/rendering/sliver_multi_box_adaptor.dart': Failed assertion: line 263 pos 16: 'child == null || indexOf(child) > index': is not true.
The relevant error-causing widget was:
ListView file:///C:/Users/gmh/AndroidStudioProjects/flutter_app/app/lib/views/danisman_listesi.dart:37:24
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by rendering library ═════════════════════════════════════════════════════
'package:flutter/src/widgets/framework.dart': Failed assertion: line 2611 pos 20: '_debugCurrentBuildTarget == context': is not true.
The relevant error-causing widget was:
ListView file:///C:/Users/gmh/AndroidStudioProjects/flutter_app/app/lib/views/danisman_listesi.dart:37:24
════════════════════════════════════════════════════════════════════════════════════════════════════
════════ Exception caught by rendering library ═════════════════════════════════════════════════════
The method '-' was called on null.
Receiver: null
Tried calling: -(322.642939390356)
The relevant error-causing widget was:
ListView file:///C:/Users/gmh/AndroidStudioProjects/flutter_app/app/lib/views/danisman_listesi.dart:37:24
════════════════════════════════════════════════════════════════════════════════════════════════════
Neden kaynaklanıyor anlayamıyorum. Yardım edebilirseniz çok sevinirim.
