Flutter Alert Dialogs

In Flutter, an AlertDialog is a dialog box that displays important information or prompts the user for a response. It is a common component used to display messages, warnings, errors, or to confirm user actions.

The AlertDialog widget provides various properties:

• title: Sets the title of the dialog.
• content: Sets the content of the dialog, typically a Text widget.
• actions: Takes an array of Widget for defining buttons or actions within the dialog. In this example, we have a single button labeled “OK.”

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 StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('AlertDialog Example'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            // Show the AlertDialog
            showDialog(
              context: context,
              builder: (BuildContext context) {
                return AlertDialog(
                  title: Text('Alert'),
                  content: Text('This is an example of AlertDialog.'),
                  actions: [
                    TextButton(
                      onPressed: () {
                        // Close the AlertDialog
                        Navigator.of(context).pop();
                      },
                      child: Text('OK'),
                    ),
                  ],
                );
              },
            );
          },
          child: Text('Show AlertDialog'),
        ),
      ),
    );
  }
}

Inside the actions array, we define a TextButton widget for the “OK” button. The onPressed callback is invoked when the button is pressed, and it uses Navigator.of(context).pop() to close the dialog.

To trigger the dialog, we use a FlatButton widget with the label “Show Alert.” On button press, it calls the _showAlertDialog function, passing the current context.