title: Android SD card directory folders name list
body: <p>How can I get names of all folders (not files) in specific directory on SD card? For example all subfolders names in <code>/sdcard/first_level_folder/...</code>.</p>
  
  <p>I need folder name, so I can pass complete path (string) to the method which will then compress (zip) it.</p>
  
  <p>Thanks.</p>