title: Change dynamically the view of every item of a ListView
body: <p>I want to change the visibility of an image of each item of a <code>ListView</code> when clicking on an external button (I mean which is not part of the <code>ListView</code>).</p>
  
  <p>So I need to access all the children views of a <code>ListView</code>. Then I did a loop like this one :</p>
  
  <pre><code>for (int i = 0...
  {
       View child_view = list_view.getChildAt(i);
       ...
  }
  </code></pre>
  
  <p>The problem is that, this way, I can only access the currently visible children, and I need to access the view of <strong>every</strong> child of the <code>ListView</code>.</p>
  
  <p>How can I do such a thing?</p>