Non-nullable instance field ''" must be initialized - flutter

Question

I am learning flutter and trying to integrate API with it and I am getting some kind of error can anyone look and told what I am doing wrong here.
class _HomePageState extends State<HomePage> {
Future<News> _newsModel; //getting error here 1*
#override
Future<void> initState() async {
super.initState();
var _newsModel = await API_Manager().getNews();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("News App"),
),
body: Container(
child: FutureBuilder(
future: _newsModel,
builder: (context, snapshot) {
if (snapshot.hasData) {
return (ListView.builder(itemBuilder: (context, index) {
return Container(
height: 100,
color: Colors.red,
);
}));
} else {
return CircularProgressIndicator();
}
},
),
),
);
}
}
1*) compiler is giving this error "Non-nullable instance field '_newsModel' must be initialized.
Try adding an initializer expression, or a generative constructor that initializes it, or mark it 'late'".
I have also tried by giving the late the error goes from the Editor but when the app runs it comes again. I am trying to get some news from the API and show them in the UI

Answer 1

The error indicates that the _newsModel field has not been initialized. if you want to initialize the field later you must mark the field with the late keyword.
From your code, you are not initialize the field, but you declare new variable named _newsModel on initState. Try removing var keyword
Future<void> initState() async {
super.initState();
_newsModel = await API_Manager().getNews();
}