android - Unable to import GoogleCloudMessaging class -


im trying implement gcm client in app.
follow this article.
thing fine till try part: 

if (checkplayservices()) {             gcm = googlecloudmessaging.getinstance(this);             regid = getregistrationid(context);              if (regid.isempty()) {                 registerinbackground();             }         } else {             log.i(tag, "no valid google play services apk found.");         }

my problem cant find googlecloudmessaging class import !
screen shot import section: enter image description here
, error when try rebuild project: 

java: cannot find symbol   symbol:   variable googlecloudmessaging   location: class com.example.app.activity.homegroupactivity

i added google-play-services library project , use g+ sharing , dont have problem it.


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