Android custom alert dialog | Custom dialog android studio kotlin | Android Studio Tutorial

Hello Guys, welcome to my #codingwithdev​ channel In This tutorial we will learn how to create a custom dialog/alert box in android studio using kotlin.

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STEP 1 : Create new Android Studio Project.

STEP 2: Here’s the activity_main.xml layout

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">

    <Button
        android:id="@+id/btnLogOut"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Log out"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

STEP 3: Here’s the layout_custom_dailog.xml layout

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginHorizontal="20dp"
    app:cardBackgroundColor="@color/white"
    app:cardCornerRadius="20dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        android:padding="20dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="App Name"
            android:textColor="@color/purple_700"
            android:textSize="18sp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/tvMessage"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:text="message"
            android:textColor="@color/black"
            android:textSize="16sp"
            android:textStyle="bold" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:gravity="center"
            android:orientation="horizontal">

            <Button
                android:id="@+id/btnYes"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:text="Yes"
                android:textAllCaps="false"
                android:textColor="@color/white"
                android:textSize="14sp" />

            <Button
                android:id="@+id/btnNo"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:backgroundTint="#A4A4A4"
                android:text="No"
                android:textAllCaps="false"
                android:textColor="@color/white"
                android:textSize="14sp" />

        </LinearLayout>

    </LinearLayout>
</androidx.cardview.widget.CardView>

STEP 4: Here’s the MainActivity.kt Activity

import android.app.Dialog
import android.graphics.Color
import android.graphics.drawable.ColorDrawable
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.Window
import android.widget.Button
import android.widget.TextView
import android.widget.Toast

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

        val btnLogOut: Button = findViewById(R.id.btnLogOut)

        btnLogOut.setOnClickListener {
            val message: String? = "Are you sure you want to log out"
            showCustomDialogBox(message)
        }
    }

    private fun showCustomDialogBox(message: String?) {
        val dialog = Dialog(this)
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE)
        dialog.setCancelable(false)
        dialog.setContentView(R.layout.layout_custom_dailog)
        dialog.window?.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))

        val tvMessage: TextView = dialog.findViewById(R.id.tvMessage)
        val btnYes: Button = dialog.findViewById(R.id.btnYes)
        val btnNo: Button = dialog.findViewById(R.id.btnNo)

        tvMessage.text = message

        btnYes.setOnClickListener {
            Toast.makeText(this, "click on Yes", Toast.LENGTH_LONG).show()
        }

        btnNo.setOnClickListener {
            dialog.dismiss()
        }
        dialog.show()
    }
}
//That it
// All code is done let's run the app

STEP 5 : And finally run the App and See the output

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