Flutter ListView itembuilder won't show anything. Why? - flutter

Question

I wanted to display multiple ListTiles using the ListView.itembuilder in Flutter. I did it, but the screen is still blank. Tried hot reloading as well as running the app twice. What's wrong in the code?
P.S: The List is going to appear in my TabBarView that I created earlier. Also posting the snipper of the TabBarView.
ListView code:
class SportBets extends StatefulWidget {
#override
_SportBetsState createState() => _SportBetsState();
}
class _SportBetsState extends State<SportBets> {
final sportList = [
"Basketball",
"Football",
"Volleyball",
];
#override
Widget build(BuildContext context) {
return ListView.builder(
itemCount: sportList.length,
itemBuilder: (context, index){
ListTile(
title: Text(sportList[index], style: TextStyle(fontSize: 20.0, color: Colors.black),),
trailing: IconButton(
icon: Icon(Icons.arrow_forward_ios),
color: Colors.blue,
onPressed: (){}
),
leading: CircleAvatar(child: Icon(Icons.wb_sunny),radius: 18.0,),
);
}
);
}
}
TabBarView Code:
body: TabBarView(
children: <Widget>[
Center(
child: Text(
"Highlights Page here",
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20),
),
),
Center(
child: Text(
"Casino Page here",
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20),
),
),
Center(
child: Text(
"Promotions Page here",
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 20),
),
),
SportBets(),
],
),

Answer 1

Some errors you need to fix
Add a `return` statement in the `itemBuilder` of `ListView`
Wrap your `TabBarView` with a `DefaultTabContoller` and set `DefaultTabContoller`'s length as 4 as you have 4 tabs.