How to enable the permission of accessing the files in the SD card of the RC?

The sample code is below:

//start the permission request
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
  val storageManager = requireActivity().getSystemService(Context.STORAGE_SERVICE) as StorageManager
  val volume: StorageVolume? = storageManager.getStorageVolume(File(curMissionPath))
  if (volume != null) {
    val intent = volume.createOpenDocumentTreeIntent()
    startActivityForResult(intent, OPEN_DOCUMENT_TREE)
    return
  }
}

//Add in onActivityResult
if (requestCode == OPEN_DOCUMENT_TREE) {
  val uri = data!!.data
  requireActivity().grantUriPermission(getPackageName(), uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION or Intent.FLAG_GRANT_READ_URI_PERMISSION)
  val takeFlags = data.flags and (Intent.FLAG_GRANT_WRITE_URI_PERMISSION or Intent.FLAG_GRANT_READ_URI_PERMISSION)
  requireActivity().getContentResolver().takePersistableUriPermission(uri!!, takeFlags)
}