title: Android list view returns null value for getChildAt()
body: <p>Hi I am developing small android application in which I want to get child at particular position in my list view.But it gives null value for me. My list and data provided to list view is proper because its working fine. But I am not able to get child at element. I did this in following way:</p>
  
  <pre><code>// inside oncreate of listactivity .... 
  setListAdapter(new SimpleAdapter(this, getData(path),
              android.R.layout.simple_list_item_1, new String[] { "title" },
              new int[] { android.R.id.text1 }));
      getListView().setTextFilterEnabled(true);
      ListView listview = getListView();
  
      listview.setSelection(20);
      View view = listview.getChildAt(3);
  </code></pre>
  
  <p>But it gives me null value. I think I am trying to get that value before it get displayed. how to do this? Am I doing something wrong? Need Help. thank you </p>