Google APIs Client Library for Java or Google Drive for accessing Google calendar / tasks
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I'm trying to sync data from Google calendar and tasks and was wondering what is the best way . I have found: 

Google APIs Client Library for Java ([http://code.google.com/p/google-api-java-client/][1])

and

Google Drive


If there a difference between the two? ([https://developers.google.com/drive/integrate-android-ui][2])


  [1]: http://code.google.com/p/google-api-java-client/
  [2]: https://developers.google.com/drive/integrate-android-ui