Launch wallpaper from activity

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http://stackoverflow.com – I coded a live wallpaper for Android. The wallpaper works fine, the only issue is that users complain sometimes because after install they cannot find the wallpaper icon in the application menu. I found several solution to this issue. The most satisfactory seems to be this one. The tutorial above suggest to create a main activity that triggers the wallpaper chooser. This solution is quite good. However, I would prefer to launch the preview of my own live wallpaper from my activtity, not the wallpaper chooser. I found some suggestion in the comments of the page above and here. but I didn't (HowTos)