求解Android Studio 导入Google Analytics 官方示例Sample build出错

[八足熊]

今天学着用GA（Google Analytics），照着官网上的教程把sample代码下载到本地后，使用Android Studio导入后build，不通过，提示为：
Error:FAILURE: Build failed with an exception.

* What went wrong:
Task '' not found in root project 'analytics'.

* Try:
Run gradle tasks to get a list of available tasks. Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

最近刚学着用Android Studio，各方面都不太熟，请问各位同仁怎么解决？
附上GA的官网教程https://developers.google.com/an ... on/android/v4/start