permission

gistfile1.txt

const val REQUEST_EXTERNAL_STORAGE = 1001

fun isStoragePermissionGranted(context: Context, activity: Activity): Boolean {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(
                context, Manifest.permission.READ_EXTERNAL_STORAGE
            ) == PackageManager.PERMISSION_GRANTED
        ) {
            // Permission is granted
            true
        } else {
            // Permission is revoked
            ActivityCompat.requestPermissions(
                activity,
                arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
                REQUEST_EXTERNAL_STORAGE
            )
            false
        }
    } else { //permission is automatically granted on sdk<23 upon installation
        // Permission is granted
        true
    }
}

override fun onRequestPermissionsResult(
        requestCode: Int, permissions: Array<String>, grantResults: IntArray
    ) {
        when (requestCode) {
            REQUEST_EXTERNAL_STORAGE -> {
                if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
                    imagePicker.start()
                }
            }
            else -> {}
        }
    }