AlertDialog

import 'package:flutter/material.dart';


class DialogAlert extends StatefulWidget {
  const DialogAlert({Key? key}) : super(key: key);

  @override
  _DialogAlertState createState() => _DialogAlertState();
}

class _DialogAlertState extends State<DialogAlert> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: const Text("AlertDialog")),
        body: Container(
            padding: const EdgeInsets.all(20),
            alignment: Alignment.center,
            child: Column(
              mainAxisAlignment: MainAxisAlignment.spaceAround,
              children: [
                oneSingleButton(context),
              ],
            )
        )
    );
  }

  /// **********************************************************************
  /// This button just for calling the AlertDialog
  /// **********************************************************************
  Widget oneSingleButton(BuildContext context) {
    return ElevatedButton(
        onPressed: () {
          confirmPhoto(context);
        },
        style: ElevatedButton.styleFrom(
            backgroundColor: Colors.blue,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20.0))
        ),
        child: const Text("Tap here")
    );
  }

  /// **********************************************************************
  /// Pops up the AlertDialog
  /// **********************************************************************
  void confirmPhoto(context) {
    showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: const Text("Do you like the photo ?"),
            titleTextStyle: const TextStyle(
                fontSize: 20,
                color: Colors.black),
            shape: const RoundedRectangleBorder(
                borderRadius: BorderRadius.all(Radius.circular(15))
            ),
            content: const Text("Please answer Yes or No"),
            actionsPadding: const EdgeInsets.symmetric(horizontal: 28),
            actions: [

              // Button No
              ElevatedButton(
                style: ElevatedButton.styleFrom(
                    foregroundColor: Colors.blue,
                    backgroundColor: Colors.white,
                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20.0))
                ),
                child: Text("No",
                    style: TextStyle(color: Theme.of(context).colorScheme.secondary)),
                onPressed: () {
                  print("Answer is No");
                  Navigator.pop(context);
                },
              ),

              // Button Yes
              ElevatedButton(
                style: ElevatedButton.styleFrom(
                    foregroundColor: Colors.white,
                    backgroundColor: Colors.blue,
                    shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(20.0),
                    )
                ),
                child: Text("Yes",
                    style: TextStyle(color: Theme.of(context).bottomAppBarColor)),
                onPressed: () {
                  print("Answer is Yes");
                  Navigator.pop(context);
                },
              ),
            ],
          );
        }
    );

  }
}