Flutter - Display a GridView Within an AlertDialog Box
Last Updated :
06 Nov, 2023
AlertDialogs are useful Widgets in Flutter to attract the users attention to a particular message that is showing by the Alert Dialogs, GridView are efficient widgets to display items in a Grid like structure. To implement a GridView inside an AlertDialog in Flutter, you can create a custom dialog content widget that contains a GridView and then display this custom dialog using the showDialog method. In this article we are going to implement an GridView within an Alert Dialog. A sample video is given below to get an idea about what we are going to do in this article.
Basic Syntax of an GridView in Flutter
GridView(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2, // Number of columns in the grid
mainAxisSpacing: 10.0, // Spacing between rows
crossAxisSpacing: 10.0, // Spacing between columns
childAspectRatio: 1.0, // Width to height ratio for grid items
),
children: <Widget>[
// List of grid items
GridTile(
child: YourGridItemWidget(),
),
// Add more GridTile widgets for other grid items
],
)
Basic Syntax of an Alert Dialog in Flutter
AlertDialog(
title: Text('Dialog Title'), // Optional title
content: Text('Dialog Content'), // Main content of the dialog
actions: <Widget>[
// List of action buttons
TextButton(
onPressed: () {
// Action to perform when the button is pressed
},
child: Text('Button 1'),
),
TextButton(
onPressed: () {
// Action to perform when the button is pressed
},
child: Text('Button 2'),
),
// Add more TextButton widgets for additional actions
],
)
Step By Step Implementation
Step 1: Create a New Project in Android Studio
To set up Flutter Development on Android Studio please refer to Android Studio Setup for Flutter Development, and then create a new project in Android Studio please refer to Creating a Simple Application in Flutter.
Step 2: Import the Package
First of all import material.dart file.
import 'package:flutter/material.dart';
Step 3: Execute the main Method
Here the execution of our app starts.
Dart
void main() {
runApp(MyApp());
}
Step 4: Create MyApp Class
In this class we are going to implement the MaterialApp, here we are also set the Theme of our App.
Dart
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
// Set the app's primary theme color
primarySwatch: Colors.green,
),
debugShowCheckedModeBanner: false,
title: 'GridView in AlertDialog Example',
home: GridViewAlertDialogExample(),
);
}
}
Step 5: Create GridViewAlertDialogExample Class
In this step we are going to create a Button by clicking the AlertDialog with an Gridview will appear on the Screen. When the button is Clicked it calls the showGridViewDialog method then the method call CustomGridViewDialog class on which the GridView Within an Alert Dialog is Implemented.
Dart
class GridViewAlertDialogExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('GridView in AlertDialog Example'),
),
body: Center(
child: ElevatedButton(
onPressed: () {
showGridViewDialog(context); // Show the GridView dialog
},
child: Text('Show GridView Dialog'),
),
),
);
}
}
void showGridViewDialog(BuildContext context) {
showDialog(
context: context,
builder: (context) {
return CustomGridViewDialog();
},
);
}
Step 6: Create CustomGridViewDialog Class
In this class we are going to implement a Gridview Within an AlertDialog.
AlertDialog(
title: Text('GridView Inside AlertDialog'),
content: Container(
width: double.maxFinite,
child: GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
childAspectRatio: 1.0,
),
itemCount: 6,
itemBuilder: (context, index) {
return Card(
elevation: 3, // Add elevation for the card effect
margin: EdgeInsets.all(8), // Add margin for spacing between cards
child: InkWell(
onTap: () {
print('Tapped on Item $index');
},
child: Center(
child: Text('Item $index'),
),
),
);
},
),
),
actions: <Widget>[
ElevatedButton(
onPressed: () {
Navigator.of(context).pop(); // Close the dialog
},
child: Text('Close'),
),
],
);
Dart
class CustomGridViewDialog extends StatelessWidget {
@override
Widget build(BuildContext context) {
return AlertDialog(
title: Text('GridView Inside AlertDialog'),
content: Container(
width: double.maxFinite,
child: GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
childAspectRatio: 1.0,
),
itemCount: 6,
itemBuilder: (context, index) {
return Card(
elevation: 3, // Add elevation for the card effect
margin: EdgeInsets.all(8), // Add margin for spacing between cards
child: InkWell(
onTap: () {
print('Tapped on Item $index');
},
child: Center(
child: Text('Item $index'),
),
),
);
},
),
),
actions: <Widget>[
ElevatedButton(
onPressed: () {
Navigator.of(context).pop(); // Close the dialog
},
child: Text('Close'),
),
],
);
}
}
Here is the full Code of main.dart file:
Dart
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
// Set the app's primary theme color
primarySwatch: Colors.green,
),
debugShowCheckedModeBanner: false, // Disable debug banner
title: 'GridView in AlertDialog Example',
home: GridViewAlertDialogExample(),
);
}
}
class GridViewAlertDialogExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('GridView in AlertDialog Example'),
),
body: Center(
child: ElevatedButton(
onPressed: () {
showGridViewDialog(context); // Show the GridView dialog
},
child: Text('Show GridView Dialog'),
),
),
);
}
}
void showGridViewDialog(BuildContext context) {
showDialog(
context: context,
builder: (context) {
return CustomGridViewDialog();
},
);
}
class CustomGridViewDialog extends StatelessWidget {
@override
Widget build(BuildContext context) {
return AlertDialog(
title: Text('GridView Inside AlertDialog'),
content: Container(
width: double.maxFinite,
child: GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
childAspectRatio: 1.0,
),
itemCount: 6,
itemBuilder: (context, index) {
return Card(
elevation: 3, // Add elevation for the card effect
margin: EdgeInsets.all(8), // Add margin for spacing between cards
child: InkWell(
onTap: () {
print('Tapped on Item $index');
},
child: Center(
child: Text('Item $index'),
),
),
);
},
),
),
actions: <Widget>[
ElevatedButton(
onPressed: () {
Navigator.of(context).pop(); // Close the dialog
},
child: Text('Close'),
),
],
);
}
}
Output:
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