Flutter - Display a GridView Within an AlertDialog Box
Last Updated :
08 Jun, 2025
AlertDialogs are useful Widgets in Flutter to attract the user's attention to a particular message that is shown by the Alert Dialogs. GridViews 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 a GridView within an Alert Dialog. A sample video is given below to get an idea of what we are going to do in this article.
Demo Video
Basic Syntax of a 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 Flutter Application
Create a new Flutter application using the command Prompt. To create a new app, write the following command and run it.
flutter create app_name
To know more about it refer this article: 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 setting 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 a Gridview will appear on the Screen. When the button is clicked, it calls the showGridViewDialog method, then the method calls the 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
// Main screen that contains a button to show GridView inside an AlertDialog
class GridViewAlertDialogExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
// AppBar widget at the top of the screen
appBar: AppBar(
backgroundColor: Colors.green, // Set app bar background color
foregroundColor: Colors.white, // Set app bar text/icon color
title: Text('GridView in AlertDialog Example'), // Title text
),
// Body of the screen
body: Center(
// Center a button on the screen
child: ElevatedButton(
// Style the button with green background and white text
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
),
onPressed: () {
showGridViewDialog(context); // Call function to show dialog
},
child: Text('Show GridView Dialog'), // Button label
),
),
);
}
}
// Function to display an AlertDialog containing a GridView
void showGridViewDialog(BuildContext context) {
showDialog(
context: context, // Required to show the dialog in the right widget tree
builder: (context) {
return CustomGridViewDialog(); // Return custom dialog widget
},
);
}
// Custom widget that defines the GridView inside an AlertDialog
class CustomGridViewDialog extends StatelessWidget {
@override
Widget build(BuildContext context) {
return AlertDialog(
title: Text('GridView Inside AlertDialog'), // Dialog title
content: Container(
width: double.maxFinite, // Make container as wide as possible
// GridView to show items in a grid format
child: GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2, // 2 items per row
childAspectRatio: 1.0, // Width-to-height ratio of each item
),
itemCount: 6, // Number of items to show
itemBuilder: (context, index) {
return Card(
color: Colors.green, // Card background color
elevation: 3, // Adds shadow to create depth
margin: EdgeInsets.all(8), // Space around each card
child: InkWell(
onTap: () {
// Print item index when tapped
print('Tapped on Item $index');
},
child: Center(
// Display item index text in the center
child: Text(
'Item $index',
style: TextStyle(color: Colors.white, fontSize: 20),
),
),
),
);
},
),
),
// Dialog action buttons
actions: <Widget>[
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green, // Button background color
foregroundColor: Colors.white, // Button text color
),
onPressed: () {
Navigator.of(context).pop(); // Close the dialog on press
},
child: Text('Close'), // Button label
),
],
);
}
}
Complete Source Code
main.dart:
Dart
// Importing Flutter material package for UI components
import 'package:flutter/material.dart';
// Entry point of the application
void main() {
runApp(MyApp()); // Runs the app and loads MyApp widget
}
// Root widget of the application
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
// Define the overall theme of the app
theme: ThemeData(
primarySwatch: Colors.green, // Set primary color to green
),
debugShowCheckedModeBanner: false, // Hide the debug banner
title: 'GridView in AlertDialog Example', // App title
home: GridViewAlertDialogExample(), // Set home screen
);
}
}
// Main screen that contains a button to show GridView inside an AlertDialog
class GridViewAlertDialogExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
// AppBar widget at the top of the screen
appBar: AppBar(
backgroundColor: Colors.green, // Set app bar background color
foregroundColor: Colors.white, // Set app bar text/icon color
title: Text('GridView in AlertDialog Example'), // Title text
),
// Body of the screen
body: Center(
// Center a button on the screen
child: ElevatedButton(
// Style the button with green background and white text
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
),
onPressed: () {
showGridViewDialog(context); // Call function to show dialog
},
child: Text('Show GridView Dialog'), // Button label
),
),
);
}
}
// Function to display an AlertDialog containing a GridView
void showGridViewDialog(BuildContext context) {
showDialog(
context: context, // Required to show the dialog in the right widget tree
builder: (context) {
return CustomGridViewDialog(); // Return custom dialog widget
},
);
}
// Custom widget that defines the GridView inside an AlertDialog
class CustomGridViewDialog extends StatelessWidget {
@override
Widget build(BuildContext context) {
return AlertDialog(
title: Text('GridView Inside AlertDialog'), // Dialog title
content: Container(
width: double.maxFinite, // Make container as wide as possible
// GridView to show items in a grid format
child: GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2, // 2 items per row
childAspectRatio: 1.0, // Width-to-height ratio of each item
),
itemCount: 6, // Number of items to show
itemBuilder: (context, index) {
return Card(
color: Colors.green, // Card background color
elevation: 3, // Adds shadow to create depth
margin: EdgeInsets.all(8), // Space around each card
child: InkWell(
onTap: () {
// Print item index when tapped
print('Tapped on Item $index');
},
child: Center(
// Display item index text in the center
child: Text(
'Item $index',
style: TextStyle(color: Colors.white, fontSize: 20),
),
),
),
);
},
),
),
// Dialog action buttons
actions: <Widget>[
ElevatedButton(
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green, // Button background color
foregroundColor: Colors.white, // Button text color
),
onPressed: () {
Navigator.of(context).pop(); // Close the dialog on press
},
child: Text('Close'), // Button label
),
],
);
}
}
Output:
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