Turn on GPS with dialog box.

MainActivity.kt

import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.google.android.gms.common.api.*
import com.google.android.gms.location.*
import com.google.android.gms.tasks.Task

class MainActivity : AppCompatActivity() {

    val TAG = "MainTag"

    private lateinit var locationRequest: LocationRequest
    private val REQUEST_CHECK_SETTING = 1001


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

        findViewById<Button>(R.id.gps_btn).setOnClickListener {
            checkLocationSetting()
        }
    }


    private fun checkLocationSetting() {
        locationRequest = LocationRequest.create()
        locationRequest.apply {
            priority = LocationRequest.PRIORITY_HIGH_ACCURACY
            interval = 5000
            fastestInterval = 2000
        }

        val builder = LocationSettingsRequest.Builder()
            .addLocationRequest(locationRequest)
        builder.setAlwaysShow(true)

        val result: Task<LocationSettingsResponse> =
            LocationServices.getSettingsClient(applicationContext)
                .checkLocationSettings(builder.build())

        result.addOnCompleteListener {
            try {
                val response: LocationSettingsResponse = it.getResult(ApiException::class.java)
                Toast.makeText(this@MainActivity, "GPS is On", Toast.LENGTH_SHORT).show()
                Log.d(TAG, "checkSetting: GPS On")
            } catch (e: ApiException) {

                when (e.statusCode) {
                    LocationSettingsStatusCodes.RESOLUTION_REQUIRED -> {
                        val resolvableApiException = e as ResolvableApiException
                        resolvableApiException.startResolutionForResult(
                            this@MainActivity,
                            REQUEST_CHECK_SETTING
                        )
                        Log.d(TAG, "checkSetting: RESOLUTION_REQUIRED")
                    }

                    LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE -> {
                        // USER DEVICE DOES NOT HAVE LOCATION OPTION
                    }
                }
            }
        }
    }


    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        when (requestCode) {
            REQUEST_CHECK_SETTING -> {
                when (resultCode) {
                    Activity.RESULT_OK -> {
                        Toast.makeText(this@MainActivity, "GPS is Turned on", Toast.LENGTH_SHORT)
                            .show()
                    }
                    Activity.RESULT_CANCELED -> {
                        Toast.makeText(
                            this@MainActivity,
                            "GPS is Required to use this app",
                            Toast.LENGTH_SHORT
                        ).show()
                    }
                }
            }
        }
    }
}

Thanks for the solution but am getting this error java.lang.ClassCastException: com.google.android.gms.common.api.ApiException cannot be cast to com.google.android.gms.common.api.ResolvableApiException because ResolvableApiException is a subclass of APIException. How can I solve this error and achieve the intended result?