How to display a Spinner in Alert Dialog in Kotlin

In this android kotlin source code example, we are going to display a Spinner in Alert Dialog in Kotlin.

You can copy and adopt this source code example to your Kotlin android project without reinventing the wheel.

Below is a step by step source code to display a Spinner in Alert Dialog in Kotlin.

activity_main.xml

<?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"
    android:padding="24dp"
    tools:context=".spinner.SpinnerActivity17">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="Show Dialog"
        android:textColor="#ffffff"
        android:textStyle="bold"
        android:onClick="showDialogSpinner"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.ArrayAdapter
import android.widget.Spinner
import androidx.appcompat.app.AlertDialog
import com.bluapp.kotlinview.R

class SpinnerActivity17 : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_spinner17)
    }

    fun showDialogSpinner(view: View){
        val spinner = Spinner(this)
        val userNames = arrayOf("Henry", "Mark", "Jack", "Smith", "Clark", "Kelvin", "Denzel")
        val arrayadapter = ArrayAdapter(this@SpinnerActivity17, android.R.layout.simple_spinner_item, userNames)
        spinner.adapter = arrayadapter
        val alertDialogBuilder = AlertDialog.Builder(this)
        alertDialogBuilder.setTitle("Your Title")
        alertDialogBuilder.setMessage("What do you want?")
        alertDialogBuilder.setView(spinner)
        val alertDialog = alertDialogBuilder.create()
        alertDialog.show()
    }
}

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