code: public static Intent pick(String mimeType) {
          Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
          intent.setType(mimeType);
          return intent;
      }
docs: Pick a type of file from the sdcard with the file manager.
  Chosen file can be obtained from Intent in onActivityResult.
  See code below for example:
  
  <pre><code>
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  Uri file = data.getData();
  }
  </code></pre>
  
  @param mimeType      the type of file to pick
  @return              the intent to pick it