String canonicalRegId = result.getCanonicalRegistrationId();

if (canonicalRegId != null) {  <=== 요것이 에러인가요? 전송은 되는거 같은데요.

  // same device has more than on registration ID: update database

 

System.out.println("same device has more than on registration ID: update database");

 

gcmResult.ERROR_CODE = GCMServerError.ERROR_CANOCIAL_REGISTRATION_ID;

gcmResult.ERROR_MSG = canonicalRegId;

}

else

{

gcmResult.ERROR_CODE = GCMServerError.ERROR_SUCCESS;

}