<plurals name="count_files">
  <item quantity="one">%d file</item>
  <item quantity="other">%d files</item>
  <item quantity="zero">%d files</item>
</plurals>

<plurals name="count_folders">
  <item quantity="one">%d folder</item>
  <item quantity="other">%d folders</item>
  <item quantity="zero">%d folders</item>
</plurals>

textView.setText(getResources().getQuantityString(R.plurals.count_folders, countfolders, countfolders) + ", " + getResources().getQuantityString(R.plurals.count_files, countfiles, countfiles));