How to populate Spinner directly from xml layout in Kotlin

In this android kotlin source code example, we are going to populate Spinner directly from xml layout.

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 populate Spinner directly from xml layout.

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.SpinnerActivity12">

    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:entries="@array/user_name"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

values/strings.xml

<string-array name="user_name">
        <item>Henry</item>
        <item>Mark</item>
        <item>Jack</item>
        <item>Smith</item>
        <item>Clark</item>
        <item>Kelvin</item>
        <item>Denzel</item>
    </string-array>

MainActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.bluapp.kotlinview.R

class SpinnerActivity12 : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_spinner12)
    }
}

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