android kotlin alert dialog builder exit example

 android kotlin alert dialog builder exit  example

Today learn android kotlin alert dialog builder exit example. Follow the kotline alert dialog builder exit example.

1.MainActivity.kt:

import android.content.DialogInterface

import android.support.v7.app.AppCompatActivity

import android.os.Bundle

import android.view.View

import android.widget.Button

import android.app.AlertDialog

import android.widget.Toast

class MainActivity:AppCompatActivity() {

  internal var closeButton: Button

  internal var builder:AlertDialog.Builder

  protected fun onCreate(savedInstanceState:Bundle) {

    super.onCreate(savedInstanceState)

    setContentView(R.layout.activity_main)

    closeButton = findViewById(R.id.button) as Button

    builder = AlertDialog.Builder(this)

    closeButton.setOnClickListener(object:View.OnClickListener() {

      fun onClick(v:View) {

        //Uncomment the below code to Set the message and title from the strings.xml file

        builder.setMessage(R.string.dialog_message).setTitle(R.string.dialog_title)

        //Setting message manually and performing action on button click

        builder.setMessage("Do you want to close this application ?")

        .setCancelable(false)

        .setPositiveButton("Yes", object:DialogInterface.OnClickListener() {

          fun onClick(dialog:DialogInterface, id:Int) {

            finish()

            Toast.makeText(getApplicationContext(), "you choose yes action for alertbox",

                           Toast.LENGTH_SHORT).show()

          }

        })

        .setNegativeButton("No", object:DialogInterface.OnClickListener() {

          fun onClick(dialog:DialogInterface, id:Int) {

            // Action for 'NO' Button

            dialog.cancel()

            Toast.makeText(getApplicationContext(), "you choose no action for alertbox",

                           Toast.LENGTH_SHORT).show()

          }

        })

        //Creating dialog box

        val alert = builder.create()

        //Setting the title manually

        alert.setTitle("AlertDialogExample")

        alert.show()

      }

    })

  }

}

2.activity_main.xml:

<?xml version="1.0" encoding="utf-8"?> 

<android.support.constraint.ConstraintLayout 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:layout_width="match_parent" 

    android:layout_height="match_parent" 

    tools:context="example.javatpoint.com.alertdialog.MainActivity"> 

 

    <Button 

        android:layout_width="wrap_content" 

        android:layout_height="wrap_content" 

        android:id="@+id/button" 

        android:text="Close app" 

        app:layout_constraintBottom_toBottomOf="parent" 

        app:layout_constraintLeft_toLeftOf="parent" 

        app:layout_constraintRight_toRightOf="parent" 

        app:layout_constraintTop_toTopOf="parent" /> 

 

</android.support.constraint.ConstraintLayout>

3. strings.xml:

<resources> 

    <string name="app_name">AlertDialog</string> 

    <string name="dialog_message">Welcome to Alert Dialog</string> 

    <string name="dialog_title">Javatpoint Alert Dialog</string> 

</resources>