Android Exit Alart Dialog kotlin

Output:

1/  Modify activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/exitButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="Exit"
        android:textSize="18sp" />

</RelativeLayout>

2/  Modify MainActivity.kt

package com.zissofworks.exitalart

import android.app.AlertDialog
import android.os.Bundle
import android.widget.Button
import androidx.activity.OnBackPressedCallback
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat


class MainActivity() : AppCompatActivity() {

    private lateinit var exitButton:Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_main)
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
            insets
        }

        exitButton = findViewById(R.id.exitButton)

        exitButton.setOnClickListener {showAlertDialogue()}

        onBackPressedDispatcher.addCallback(object: OnBackPressedCallback(enabled = true){
            override fun handleOnBackPressed() { showAlertDialogue() }
        })

    }

    private fun showAlertDialogue() {
        val builder: AlertDialog.Builder = AlertDialog.Builder(this@MainActivity)

        builder.setMessage("Are You Sure You want to exit?")
        builder.setPositiveButton("Yes") { _, _ -> finish() }
        builder.setNegativeButton("No") { _, _ -> }
        val alertDialog: AlertDialog = builder.create()
        alertDialog.show()
    }


}