MainActivity.kt

    private val cameraPermission =
        registerForActivityResult(ActivityResultContracts.RequestPermission()) { granted ->
            with(binding.root) {
                when {
                    granted -> snackBar("Permission granted!")
                    shouldShowRequestPermissionRationale(Manifest.permission.CAMERA) -> {
                        //this option is available starting in API 23
                        snackBar("Permission denied, show more info!")
                    }
                    else -> snackBar("Permission denied")
                }
            }
        }