How to have summary of PreferenceScreen show up
<p>I want to have a fullscreen PreferenceScreen with a title and a summary. However when I give summary text, it doesn't show up:</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"
    android:title="My Title"
    android:summary="My Summary"&gt;
......

&lt;/PreferenceScreen&gt;
</code></pre>
