title: Update Android ListActivity when list data changes?
body: <p>I wanted to know how to refresh a <code>ListActivity</code> when I change/add data to it.</p>
  
  <p>I first thought that <code>ListAdapter</code> would know when the list is changes, but when I have added elements to the list there is no update on the <code>ListActivity</code>, only when I close the ListActivity and reopen it again I see the changes occur.</p>
  
  <p>So I searched for any method such as: <code>update(), refesh()</code> or something like that, but there is none.
  It seems I haven't gotten the concept, can someone help me please?</p>