title: when to use Action bar and sherlockActionbar
body: <p>i am newbie in Android and in this forum too. i don't know when to use Action bar and <code>sherlockActionbar</code>. i am using <code>Api </code>16 . Can someone please explain here? Thanks in advance.</p>
  <h3>Updated :please tell me how to customize my Action bar. i don't wanna show my app icon in left side of action bar and also want s to change the color and put the image over there??</h3>