what ?android:attr/listPreferredItemHeight is doing and how?
<ul>
<li>public static final int listPreferredItemHeight</li>
</ul>

<p>Ok, ofcourse i understand this part of the expression...listPreferredItemHeight is  the preferred list item height.</p>

<p>But i really dont get these stuff...and google didnt help. Anyone can point me to the right direction where i can read about that? </p>

<blockquote>
  <p>This may also be a reference to a resource (in the form
  "@[package:]type:name") or theme attribute (in the form
  "?[package:][type:]name") containing a value of this type.</p>
</blockquote>

<p>the example where i find this code is here <a href="http://android-developers.blogspot.com/2009/02/android-layout-tricks-1.html" rel="nofollow">http://android-developers.blogspot.com/2009/02/android-layout-tricks-1.html</a></p>

<p>thnx in advanced</p>

<p>EDIT : in the example at the link the code is    *android:layout_height="?android:attr/listPreferredItemHeight"* . What exactly it means?</p>
