Books about Android User Interface design [closed]

Question

In my opinions, a beautiful UI is extrem important for the success of app.

So now I'm searching a book about the User Interface design (at best) for Android, it should not be about the technical implementation, like how to create a menu or use different layouts. It should be more about the design concept.

The offical document: http://developer.android.com/design/index.html is great, but too short. I also found a book exact about this topic, but it's still not yet published until 2013.

So any suggestion about books in this topic would be thankful.

Answer 1

Look at this link, here you can find nice tutorial and its description .

http://mobile.tutsplus.com/tutorials/android/android-layout/

Conference Coverage about Android and User Interface Design on Lanyrd