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AlertDialog in Flutter | Flutter Alert Dialog Example

AlertDialog in Flutter | Flutter Alert Dialog Example:

 



it is used to display message box into flutter application.


AlertDialog(title:Text("content")


................................................


Type of Alert Dialog


1) Basic AlertDialog

2) Confirmation Dialog

3) Select AlertDialog

4) TextField AlertDialog



Example of BasicAlertDialog:

import 'package:flutter/material.dart';

class MyAlertDialog extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomeScreen(),
    );
  }
}

class HomeScreen extends StatelessWidget {
  void _showAlertDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text("Alert"),
          content: Text("This is an alert dialog in Flutter."),
          actions: <Widget>[
            TextButton(
              child: Text("OK"),
              onPressed: () {
                Navigator.of(context).pop(); // Close the dialog
              },
            ),
          ],
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter AlertDialog Example")),
      body: Center(
        child: ElevatedButton(
          child: Text("Show Alert"),
          onPressed: () {
            _showAlertDialog(context);
          },
        ),
      ),
    );
  }
}

Example of Other Dialog:

import 'package:flutter/material.dart';

class Confirmationdialog extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: SecondScreen(),
    );
  }
}

class SecondScreen extends StatelessWidget {
  void _showInputDialog(BuildContext context) {
    TextEditingController _controller = TextEditingController();

    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text("Enter Input"),
          content: TextField(
            controller: _controller,
            decoration: InputDecoration(hintText: "Type something..."),
          ),
          actions: <Widget>[
            TextButton(
              child: Text("Cancel"),
              onPressed: () {
                Navigator.of(context).pop(); // Close the dialog
              },
            ),
            TextButton(
              child: Text("Submit"),
              onPressed: () {
                String inputText = _controller.text;
                Navigator.of(context).pop(); // Close the dialog
                ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(content: Text("You entered: $inputText")),
                );
              },
            ),
          ],
        );
      },
    );
  }


   void _showSelectDialog(BuildContext context) {
    List<String> options = ["Option 1", "Option 2", "Option 3"];

    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text("Select an Option"),
          content: Column(
            mainAxisSize: MainAxisSize.min,
            children: options.map((option) {
              return ListTile(
                title: Text(option),
                onTap: () {
                  Navigator.of(context).pop(); // Close the dialog
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(content: Text("You selected: $option")),
                  );
                },
              );
            }).toList(),
          ),
        );
      },
    );
  }

  void _showAlertDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text("Alert"),
          content: Text("This is an alert dialog in Flutter."),
          actions: <Widget>[
            TextButton(
              child: Text("Cancel"),
              onPressed: () {
                Navigator.of(context).pop(); // Close the dialog
              },
            ),
            TextButton(
              child: Text("Confirm"),
              onPressed: () {
                // Handle the confirmation action
                Navigator.of(context).pop();
                ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(content: Text("Confirmed!")),
                );
              },
            )
          ],
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Flutter AlertDialog Example")),
      body: Center(
        child: ElevatedButton(
          child: Text("Show Confirm Alert"),
          onPressed: () {
           _showInputDialog(context);
          },
        ),
      ),
    );
  }
}
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