an example of calling
<code><a href="../../reference/android/graphics/Bitmap.html#recycle()">recycle()</a></code>. It uses reference counting
(in the variables <code>mDisplayRefCount</code> and <code>mCacheRefCount</code>) to track 
whether a bitmap is currently being displayed or in the cache. The
code recycles the bitmap when these conditions are met:</p>

<ul>
<li>The reference count for both <code>mDisplayRefCount</code> and 
<code>mCacheRefCount</code> is 0.</li>
<li>The bitmap is not <code>null</code>