trouble using Debug.MemoryInfo
<p>I am trying to get memory usage values using this class, but all the class members are zero.  I am calling it like this:</p>

<pre><code>android.os.Debug.MemoryInfo dbm = new android.os.Debug.MemoryInfo();
</code></pre>

<p>but them dbm.dalvikPss (and the other class members) are zero.  Any ideas?  Thanks in advance.</p>
