Here's a fun hack that should be useful for Android developers and designers, and at least interesting for the rest of us. If you're designer who's working on high-quality mock ups for a new app, seeing how they look on your actual device is a bit of a hassle - you've got to save the files, copy them over to the device, try it out, then make changes and repeat. The Android Design Preview tool takes all those steps out by allowing your phone to see a one-to-one pixel representation of your computer screen.