How to change Orientation programmatically in Android

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
                xmlns:tools="https://schemas.android.com/tools"
                android:layout_width="match_parent"
              android:gravity="center"
              android:orientation="vertical"
                android:layout_height="match_parent"
                tools:context=".MainActivity">

    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:text="Screen Orientation programmatically"
            android:textSize="24sp"

            android:textStyle="bold"/>

    <Button
            android:id="@+id/btnButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
              android:text="Change Orientation"
            android:background="@color/colorPrimary"
            android:textColor="@color/white"
            android:layout_margin="16dp"
            android:minEms="10"
    />
</LinearLayout>

package com.rrtutors.androidsamples

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import kotlinx.android.synthetic.main.activity_screen_orientation.*
import android.content.pm.ActivityInfo
import android.content.res.Configuration
import androidx.core.app.ComponentActivity.ExtraData
import androidx.core.content.ContextCompat.getSystemService
import android.icu.lang.UCharacter.GraphemeClusterBreak.T



class ScreenOrientationActivity : AppCompatActivity() {

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

        btnButton.setOnClickListener(object : View.OnClickListener{
            override fun onClick(v: View?) {
                val currentOrientation = resources.configuration.orientation
                if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
                    requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
                } else {
                    requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
                }
            }

        })
    }
}