PreferenceActivity not showing twice on android
<p>i've a PreferenceActivity which works perfectly the first time i launch it.</p>

<p>But if i close it ( with the back button ) and then i re open it ( through a menu click in the main activity ) then i get a black screen. There is no preferences at all..</p>

<p>I can't figure it out why it should not working. </p>

<p>It seems all the code is being called normally as the working one but no preferences are showing on the screen.</p>

<p>Did someone had the same behaviour ?</p>
