LRU policy in Android background processes management
<p>A LRU policy is used in background processes. And we can extract the LRU value with the following:</p>

<pre><code>RunningAppProcessInfo process;
int lru = process.lru;
</code></pre>

<p>I thought the <code>lru</code> is an integer from 1 to n ( on nexus 7, Android 4.2, n is 7).</p>

<p>However I also noticed at a particular time, there are multiple processes with the same <code>lru</code> value. For example,</p>

<p><img src="http://i.stack.imgur.com/wj2TG.png" alt="enter image description here"></p>

<p>How to understand these processes with the same values? </p>

<p>E.g. <code>com.twitter.android</code> and <code>com.pandora.android</code> both have <code>lru</code> 4. But they were not be able to be shown to the user at the same time.</p>
