Flutter: CheckboxListTile inside ListView jumps to top - flutter

Question

So I know there are some similar questions about this issue but none of them worked for me. I have a ListView with different CheckboxListTiles and when I scroll down and choose an item, the ListView automatically jumps to the top. Is there a way to prevent this from happening? Thank you very much!
I've added a screenshot, so you can better understand.
This is my code:
class CheckboxWidget extends StatefulWidget {
const CheckboxWidget({
Key key,
this.item,
this.type,
this.state,
}) : super(key: key);
final Map<String, bool> item;
final String type;
final Map<String, dynamic> state;
#override
State<CheckboxWidget> createState() => _CheckboxWidgetState();
}
class _CheckboxWidgetState extends State<CheckboxWidget> {
#override
void initState() {
super.initState();
if (widget.state[widget.type].isEmpty) {
widget.item.updateAll((key, value) => value = false);
}
}
bool isChecked = false;
#override
Widget build(BuildContext context) {
final FilterProvider filterProvider = Provider.of<FilterProvider>(context);
return Expanded(
child: ListView(
key: UniqueKey(),
children: widget.item.keys.map(
(key) {
return CheckboxListTile(
contentPadding: EdgeInsets.only(left: 2, right: 2),
title: Text(
key,
style: TextStyle(fontSize: 19, fontWeight: FontWeight.w400),
),
value: widget.item[key],
activeColor: Color(0xffF6BE03),
checkColor: Color(0xff232323),
shape: CircleBorder(),
//contentPadding: EdgeInsets.all(0),
onChanged: (value) {
value
? filterProvider.multifiltervalue = [widget.type, key]
: filterProvider.multifiltervalue = [
widget.type,
key,
false
];
setState(
() {
widget.item[key] = value;
},
);
},
);
},
).toList(),
),
);
}
}

Answer 1

Probably because this line key: UniqueKey(), when you call setState the build function builds its widgets again, and the ListView will have a new UniqueKey so it will rebuild the list cause it thinks its a different widget
remove this line key: UniqueKey(), and it should work fine

Answer 2

CheckboxListTile is a stateless Widget... setState is redrawing the whole list.
You could wrap the CheckboxListTile into a Statefull Widget or into a StatefulBuilder ... if you call setState inside the StatefulBuilder only this part should be redrawed..
another way could be to save the scroll position... but i think redrawing only the part on screen you haved changed is smarter :-)