Using a StreamBuilder and a SliverLists In CustomScrollView
In this case it is fine to rerender the whole CustomScrollView. However if you want to rerender just one Sliver in a CustomScrollView, do it like this:
CustomScrollView(
slivers: <Widget>[
StreamBuilder(
stream: stream,
builder: (ctx, snapshot) {
return SliverToBoxAdapter(
child: Text('sliver box'),
);
},
)
],
),
Remember to always return a Sliver inside the StreamBuilder.
Sure, it's easy, here you have a code sample:
class SampleStreamBuilder extends StatelessWidget {
Stream<List<String>> loadData() async* {
await Future.delayed(Duration(seconds: 3));
yield List.generate(10, (index) => "Index $index");
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: StreamBuilder<List<String>>(
stream: loadData(),
builder: (context, snapshot) {
return snapshot.hasData
? CustomScrollView(
slivers: [
SliverList(
delegate: SliverChildBuilderDelegate((context, index) {
return ListTile(
title: Text(snapshot.data[index]),
);
}, childCount: snapshot.data.length),
)
],
)
: Center(
child: CircularProgressIndicator(),
);
},
),
);
}
}