CheckLocationSettings.kt

fun checkLocationSettings(onSuccessCallback: () -> Unit) {
    val locationRequest = LocationRequest.create()
    locationRequest.priority = LocationRequest.PRIORITY_LOW_POWER
    val builder = LocationSettingsRequest.Builder()
    builder.addLocationRequest(locationRequest)
    val client = LocationServices.getSettingsClient(this)
    val task = client.checkLocationSettings(builder.build())
    task.addOnSuccessListener(this) {
        onSuccessCallback()
    }
    task.addOnFailureListener(this) {
        if (it is ResolvableApiException) {
            // Location settings are not satisfied, but this can be fixed
            // by showing the user a dialog.
            try {
                // Show the dialog by calling startResolutionForResult(),
                // and check the result in onActivityResult().
                it.startResolutionForResult(this, 111)
            } catch (sendEx: IntentSender.SendIntentException) {
                // Ignore the error.
            }
        }
    }
}