TabView inside CustomScrollView - flutter

Question

Wrapping TabBarView with SliverFillRemaining (fill remaining empty space like Expanded) gives the following error output.
flutter: A RenderPositionedBox expected a child of type RenderBox but received a child of type
flutter: RenderSliverList.
TabController tabContoller;
#override
void initState() {
tabContoller = new TabController(
vsync: this,
length: 3,
);
#override
Widget build(BuildContext context) {
return new Scaffold(
floatingActionButton:floatActionBtn(...),
bottomNavigationBar: bottomNavigationBar(...),
appBar: apBar(),
body: Stack(
children: <Widget>[
CustomScrollView(
slivers: <Widget>[
SliverAppBar(
backgroundColor: Colors.transparent,
automaticallyImplyLeading: false,
expandedHeight: 195.0,
flexibleSpace: FlexibleSpaceBar(
background: new Stack(
children: <Widget>[
...
]),
),
),
new SliverFillRemaining(
child: TabBarView(
controller: tabContoller,
children: <Widget>[
Tab(...),
Tab(...),
Tab(...)
],
),
),
],
),
],
)

Answer 1

Don't forget the DefaultTabController, this code is working fine:
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 3,
child: Container(
child: CustomScrollView(slivers: <Widget>[
SliverAppBar(),
new SliverFillRemaining(
child: TabBarView(
children: <Widget>[
Text("Tab 1"),
Text("Tab 2"),
Text("Tab 3"),
],
),
),
])),
);
}

Answer 2

You can use NestedScrollView like this
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 3,
child: Scaffold(
body: NestedScrollView(
headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
return <Widget>[
SliverAppBar(
forceElevated: innerBoxIsScrolled,
automaticallyImplyLeading: false,
expandedHeight: 195.0,
flexibleSpace: FlexibleSpaceBar(
),
),
SliverList(
delegate: SliverChildBuilderDelegate(
(_, int index) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
TabBar(
labelColor: AppColors.black,
unselectedLabelColor: AppColors.gray,
indicatorColor: AppColors.primaryColor,
indicatorWeight: 4,
indicatorPadding: EdgeInsets.symmetric(horizontal: 16),
labelPadding: EdgeInsets.zero,
tabs: [
Text("FIRST"),
Text("SECOND"),
Text("THIRD"),
],
)
],
);
},
childCount: 1,
),
),
];
},
body: TabBarView(
children: <Widget>[
Text("FIRST TAB"),
Text("SECOND TAB"),
Text("THIRD TAB"),
],
),
),
),
);
}