When describing how you'd like raster art to display, you can use the "Density-independent pixel (dp)" unit described here: <a href="http://developer.android.com/guide/practices/screens_support.html" rel="nofollow">http://developer.android.com/guide/practices/screens_support...</a><p>Thanks for taking the time to share this. I'd like to hear more about why your devs actually <i>need</i> pixel units specified, instead of implementing a scalable interface based on percentages.<p>You've done this with the "13.75%" left and right margins -- why not do this for most elements as well (eg, GO button is 14% screen height -- abbrv. as 'sh:14').
The DP is the right direction to go, same with the XCode 'point'. I think both still need to be conceptually separated form Pixels further. As for going entirely relative, There are some things that need to be solidified - mainly type treatments - as well as the elements that surround those elements - like padding, margin, and measure.