====== Using native activities ======

  * http://androidmyway.wordpress.com/2012/02/05/selecting-image-from-gallery-or-taking-image-from-camera-with-options-menu-uploading-to-server/
  * http://stackoverflow.com/questions/6713186/dialogfragment-calls-back-to-activity-but-want-activity-to-update-another-fragm