Cannot resolve symbol 'GoogleCloudMessaging' GCM

Question

I am trying to get GCM working in my app (to notify users when our hours change, or when we have any promos going on), but I keep getting the error Cannot

Answer 1

If you are using Android Studio:

1) Downloaded the Google Play SDK (using the SDK Manager):

2) Don't forget to click on the "Synch Project with Gradle Files" button

That did the trick for me.