Hi Moss, there is a google group called "GLWallpaperService" around an open 
source OpenGL WallpaperService implementation, you might want to check it 
out and/or ask questions there.  

I've been using it and when orientation changes happen on the device (I am 
testing with a tablet, and a friend's dell streak 5, as this does not happen 
with my phone), there is no context loss and it is able to use the textures 
which are in memory, they do not need to be reloaded - this is when it's 
running as a live wallpaper - don't know about VBOs but I'm assuming they 
are safe as well.  Now, in a normal activity using the same renderer and a 
GLSurfaceView, there is a context loss on orientation changes, and textures 
DO have to be reloaded, the same is true on the settings screen.  So you may 
want to look at the implementation as it essentially does most of what 
GLSurfaceView does with a few differences to work in a live wallpaper 
setting.

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