Flutter ElevatedButton onPressed
To perform an action when the Flutter ElevatedButton is pressed, assign the callback function to onPressed
property of this ElevatedButton.
Syntax
ElevatedButton(
onPressed: () {
//executes when the button is pressed
},
child: const Text('Submit'),
),
Example
Flutter Application with ElevatedButton widget 'Submit'
. onPressed
callback is set to display a SnackBar when this button is pressed.
main.dart
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
/// main application widget
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
static const String _title = 'Flutter Application';
@override
Widget build(BuildContext context) {
return MaterialApp(
title: _title,
home: Scaffold(
appBar: AppBar(title: const Text(_title)),
body: const MyStatefulWidget(),
),
);
}
}
/// stateful widget that the main application instantiates
class MyStatefulWidget extends StatefulWidget {
const MyStatefulWidget({Key? key}) : super(key: key);
@override
State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}
/// private State class that goes with MyStatefulWidget
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
@override
Widget build(BuildContext context) {
final ButtonStyle style =
ElevatedButton.styleFrom(textStyle: const TextStyle(fontSize: 20));
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
ElevatedButton(
style: style,
onPressed: () {
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text('You clicked ElevatedButton.')));
},
child: const Text('Submit'),
),
],
),
);
}
}
Output