How to Implement Dropdown Menu on Elevated Button in Flutter
Introduction
Dropdown menus are a great way to provide users with multiple options without taking up too much space on the screen. In Flutter, implementing a dropdown menu on an Elevated Button can be achieved with a few lines of code. In this article, we will explore how to implement a dropdown menu on an Elevated Button in Flutter.
What is Elevated Button
An Elevated Button is a type of button in Flutter that has a raised appearance, giving it a sense of depth and dimension. It is often used as a call-to-action button, such as “Submit” or “Login”.
Implementing Dropdown Menu on Elevated Button
To implement a dropdown menu on an Elevated Button, we need to use the `DropdownButton` widget in Flutter. The `DropdownButton` widget is used to create a dropdown menu that can be used to select a value from a list of options.
Here is an example of how to implement a dropdown menu on an Elevated Button:
“`dart
import ‘package:flutter/material.dart’;
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
MyHomePageState createState() => MyHomePageState();
}
class _MyHomePageState extends State
String _selectedValue;
@override
void initState() {
super.initState();
_selectedValue = ‘Option 1’;
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(‘Dropdown Menu on Elevated Button’),
),
body: Center(
child: ElevatedButton(
child: Row(
mainAxisSize: MainAxisSize.min,
children: [
Text(_selectedValue),
Icon(Icons.arrowdropdown),
],
),
onPressed: () {
setState(() {
_showDropdownMenu();
});
},
),
),
);
}
void _showDropdownMenu() {
showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
title: Text(‘Select an option’),
content: DropdownButton(
isExpanded: true,
value: _selectedValue,
items: [
DropdownMenuItem(
child: Text(‘Option 1’),
value: ‘Option 1’,
),
DropdownMenuItem(
child: Text(‘Option 2’),
value: ‘Option 2’,
),
DropdownMenuItem(
child: Text(‘Option 3’),
value: ‘Option 3’,
),
],
onChanged: (value) {
setState(() {
_selectedValue = value;
});
},
),
actions: [
TextButton(
child: Text(‘OK’),
onPressed: () {
Navigator.of(context).pop();
},
),
],
);
},
);
}
}
“`
Customizing the Dropdown Menu
The dropdown menu can be customized to fit your app’s theme and design. You can change the color, font, and layout of the dropdown menu to match your app’s style.
Conclusion
In this article, we learned how to implement a dropdown menu on an Elevated Button in Flutter. We used the `DropdownButton` widget to create a dropdown menu that can be used to select a value from a list of options.
Frequently Asked Questions
1. Q: How do I add a dropdown menu to an Elevated Button in Flutter?
A: You can add a dropdown menu to an Elevated Button by using the `DropdownButton` widget.
2. Q: Can I customize the dropdown menu in Flutter?
A: Yes, you can customize the dropdown menu to fit your app’s theme and design.
3. Q: How do I show the dropdown menu when the Elevated Button is pressed?
A: You can show the dropdown menu when the Elevated Button is pressed by using the `showDialog` function.
4. Q: Can I use the `DropdownButton` widget outside of an Elevated Button?
A: Yes, you can use the `DropdownButton` widget anywhere in your app, not just inside an Elevated Button.
5. Q: How do I handle the selection of an option from the dropdown menu?
A: You can handle the selection of an option from the dropdown menu by using the `onChanged` property of the `DropdownButton` widget.
