android - How to get Canonical ID from GCM

Question

I am trying to get a unique ID for my device so I can get push notifications from my server.

As all turorials say : I register using GMC:

  GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(context);
  String regid = gcm.register(PROJECT_NUMBER);  // <---- duplicated if uninstalled/ reinstalled
  SendRegIdToServer(regId);

Now, I send the regId my server and save on device.

The problem comes when I uninstall and reinstall, since the local storage is lost, I ask GCM to register again and I get a new registration ID. Because of this, my server is having duplicates of the same device.

I looked at SO butlot of questions are on GCMRegistrar, which is deprecated now. People say use Canonical ID, which is unique. But how do I get it ?

I am using gcm.register and using that ID, which obviously is duplicating on the server.

Appreciate any help.

Answer 1

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