background images cross fading
<p>I have an application which have multiple backgrounds.   I would like to cross-fade these backgrounds at a fixed time interval having one background fading out while slowly showing another (kind of like a slideshow).   I know how to use the cross-fading effect in xml but the problem is it won't show another image until the active image is totally fading out.   I want the transitions to overlap.  Please help.</p>

<p>Thanks.</p>
