I have been trying, for 2 days now, to simply get past the first few pages of the first chapter of Big Nerd Ranch\'s Android Programming Book.
The gist of my problem is
OK, So after several hours of experimentation and research, there is currently no way to create a default Android project with the Rev 23.0 version of the ADT Tools.
Here is what I did form scratch to get things working on my computer. I'm running OS X 10.9.3:
Downloaded the ADT tools version 22.6.3 from here: ADT 22.6.3 Mac
And that's it, I am now able to create an application and the .java and activity files are there.
As mentioned by Mr. Kro, there are differences between the book and the SDK, but this is to be expected after ~1 year since its release. In any case this is going to help you if you are having the same trouble as I am. And with this you can use the latest Eclipse and the latest stable Android SDK/ADT, until Google patches Rev 23.