There are Coding Conventions for Android. They include some stuff like naming conventions that can be checked using checkstyle.
I've found some config for checkstyle: http://ksoichiro.blogspot.com/2011/05/android-checkstyle.html
But I want to ask if there is some more complete config for checkstyle. Maybe Google provide some official checkstyle config?
Here you can find some that implement http://source.android.com/source/code-style.html although none of them is official.