flutter constructor stateful widget
flutter run --no-sound-null-safetyflutter constructor stateful widget
flutter run --no-sound-null-safetyflutter stateful widget
class YellowBird extends StatefulWidget {
const YellowBird({ Key key }) : super(key: key);
@override
_YellowBirdState createState() => _YellowBirdState();
}
class _YellowBirdState extends State<YellowBird> {
@override
Widget build(BuildContext context) {
return Container(color: const Color(0xFFFFE306));
}
}make stateful widget flutter
class MyClass extends StatefulWidget {
@override
MyClassState createState() => new MyClassState();
}
class MyClassState extends State<MyClass> {
//Widgets and other code here
}Flutter Stateful Widget
import 'package:flutter/material.dart';
class WidgetWithState extends StatefulWidget {
@override
_WidgetWithStateState createState() => _WidgetWithStateState();
}
class _WidgetWithStateState extends State<WidgetWithState> {
int counter = 0;
increment() {
setState(() {
counter++;
});
}
decrement() {
setState(() {
counter--;
});
}
@override
Widget build(BuildContext context) {
return Row(
children: <Widget>[
FlatButton(onPressed: increment, child: Text('Increment')),
FlatButton(onPressed: decrement, child: Text('Decrement')),
Text(counter.toString()),
],
);
}
}Copyright © 2021 Codeinu
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