title: Gridview getChildAt hidden fields
body: <p>I have issue with Gridview in Android.</p>
  
  <p>Context :
  I have a gridview, with a list of images downloaded (around 100 images).</p>
  
  <p>To do it more convenient for user, a first gridview is load, with inside 100 images on which is a logo Loading.
  After that, I start an AsyncTask that :
  In onProgressUpdate => Update image with gridview.getChildAt
  In onPostExecute => change adapter of gridview with the list of bitmaps downloaded</p>
  
  <p>My issue is in onProgressUpdate.
  When using getChildAt(position), I realized that position means position of the item in the visible rect. So there is two issues :
   => First, hidden images are not updated (it's why I'm doing an setAdapter in PostExecute)
   => Second, if I scroll while downloading, it forget the first images, and some other issues while scrolling, but difficult to express with word ...</p>
  
  <p>My question is a little easy, but I didn't find in Android Reference, and also after Google searches :
   - How is it possible to update a view in a gridview by its real position, and not by visible position ?</p>
  
  <p>Thanks a lot</p>