Tips for making the Android launcher transparent
<p>I'm designing a custom Android 4.0 (ICS) device for special purpose.</p>

<p>One of the things I'm looking for is a way to make the Android Launcher, when other activities were previously running, show the last running activity as a transparent, dimmed background, with the launcher icons and widgets on top.</p>

<p>What I'm looking for, is something like this: <a href="http://stackoverflow.com/questions/2176922/how-to-create-transparent-activity-in-android">How to create Transparent Activity in Android?</a>, except as a modification to Launcher2. I guess I can apply a similar style to the launcher as proposed in that SO, but what about the wallpaper?</p>

<p>AFAIU, the wallpaper is rendered by a separate service, and I still want it rendered if there are no other activities behind the launcher.</p>

<p>Any tips?</p>
