flutter class double extends - flutter

Question

Is it possible to have double extends in a single class? in my case, i have class class AddCreditsState extends State<AddCredits> i just want to extends the HookWidget in my class AddCreditsState extends State<AddCredits>,
class AddCreditsState extends State<AddCredits>{ // how do i insert the `HookWidget` here?
return Scaffold(
backgroundColor: Color.fromRGBO(10, 15, 39, 1),
body: SingleChildScrollView(
child: Container(
width: globals.screenWidth,
height: globals.screenHeight,
margin: EdgeInsets.only(top: 25),
child: Column(
children: [headercol, body],
)),
),
);
}

Answer 1

In Dart, you can implements multiple interfaces, but Dart only supports single inheritance. So, you can not extends from multiple classes.
You can though use multiple Mixins with with.
But in this particular case, what you probably want is a StatefulHookWidget, a StatefulWidget that can use hooks inside its build method.
Full source code
import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
void main() {
runApp(
MaterialApp(
debugShowCheckedModeBanner: false,
title: 'StatefulHookWidget Example',
home: HomePage(),
),
);
}
class HomePage extends StatefulHookWidget {
#override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
String _state = 'Hello';
#override
Widget build(BuildContext context) {
final _hookedVar = useState('Hello');
return Scaffold(
appBar: AppBar(title: Text('StatefulHookWidget Example')),
body: Container(
padding: EdgeInsets.all(16.0),
alignment: Alignment.center,
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Text('STATE: $_state'),
const SizedBox(height: 16.0),
Text('HOOK: ${_hookedVar.value}'),
const SizedBox(height: 16.0),
ElevatedButton(
onPressed: () {
setState(() => _state = 'Goodbye');
_hookedVar.value = 'Goodbye';
},
child: Text('CLICK ME'),
)
],
),
),
);
}
}