使用Gradle在Android Studio中添加Youtube Data API

Android Studio cannot find the necessary YouTube classes in my application. I'm recycling some code of a previous project. In the previous project I just imported the jar file provided by google. But I want to learn a better way using gradle. I've used gradle before with success. Its awesome when it works. I've been able to add dependencies using gradle before. But for some reason I can't get a google lib to download or activate or whatever it needs to do so that my IDE can find all these missing youtube symbols. I've done the usual syncing with gradle and rebuilding and cleaning and all that but it hasn't helped.Android Studio cannot find the necessary YouTub