Create Alert Dialog (Kotlin) - Android Studio

      DESCRIPTION      

In this tutorial we will use Alert Dialog to alert the user whether you want to perform specific function or not. Alert Dialog will contain icon, title, message and two buttons "Yes", "No". We will show a alert dialog on button click.

Android Alert Dialog (Kotlin)

      VIDEO      

      SOURCE CODE      

Step 1:  Create a new project OR Open your project

Step 2: Code

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:padding="20dp"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/showsnackbarbtn"
        android:text="Show Alert Dialog"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

MainActivity.kt

package com.blogspot.devofandroid.myapplication

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.support.v7.app.AlertDialog
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        showsnackbarbtn.setOnClickListener {
            val mAlertDialog = AlertDialog.Builder(this@MainActivity)
            mAlertDialog.setIcon(R.mipmap.ic_launcher_round) //set alertdialog icon
            mAlertDialog.setTitle("Title!") //set alertdialog title
            mAlertDialog.setMessage("Your message here") //set alertdialog message
            mAlertDialog.setPositiveButton("Yes") { dialog, id ->
                //perform some tasks here
                Toast.makeText(this@MainActivity, "Yes", Toast.LENGTH_SHORT).show()
            }
            mAlertDialog.setNegativeButton("No") { dialog, id ->
                //perform som tasks here
                Toast.makeText(this@MainActivity, "No", Toast.LENGTH_SHORT).show()
            }
            mAlertDialog.show()
        }
    }
}

Step 3: Output

Create Alert Dialog (Kotlin) - Android Studio

Create Alert Dialog (Kotlin) - Android Studio