The Stumble Stones
The Android Team’s switch from the Eclipse based Android Developer Tools to the IntelliJ IDEA based "Android Studio" at Google I/O is pretty well-known. But what isn’t too well-known is that they also changed the default android project directory structure as they switched their build system from ant to gradle.
Further information on the new structure and the new build system are available here: http://tools.android.com/tech-docs/new-build-system/user-guide
I decided to go with the new Gradle-based structure as I thought it was more future proof. I have to admit that I regret this badly! As I’m not too familiar with Gradle, yet, I had a pretty bad time trying to understand the customizations brought in by the gradle-android plugin. Additionally most of the information available on the net is specific to Eclipse/ Ant based projects and therefore slightly different for the new structure.