title: the getChildView method run 2 times in Expandable ListView
body: <p>i am creating an app which contains an expandable list view. the child views are created dynamically. and it run successfully. During debugging i found that the getChildview function  runs 2 times.</p>
  
  <p>i create dynamic layouts and put it into a list. when the getChildView runs 2 times the layouts added 2 times in to the list.. </p>