I'm developing my first Android application and am beginning to work on the interface in earnest. Can anyone recommend some good tutorials or guides for produc

I'm developing my first Android application and am beginning to work on the interface in earnest. Can anyone recommend some good tutorials or guides for producing elegant layouts that respond well to different screen sizes? I understand the basic mechanics and laid out in the dev guides, but I'm a bit lots when it comes to putting it all together elegantly.