java.lang.NoClassDefFoundError for any google-play-services feature

Question

I\'m using the last version of Eclipse, ADT and the newest Android SDK. If I\'m trying to use something in a simple HelloWorld Android project Google Play feature, for instance,

Answer 1

You probably need to add a reference to the project in Project Settings->Android->Library.

Look at the "Referencing a library section" here. Add your project reference there as well and you should be alright.