Registration confusion Android GCM

Question

I am trying to migrate to GCM in Android, C2DM now being deprecated. The registration process described here is different from registration describ

Answer 1

I've successfully migrated my C2DM project to GCM. Tested, it works fine. The only changes were:

• in the Android app - change the value of sender upon registration
• on the server side - change the auth header and the URL

That was it, as far as the interaction with Google goes. There were more some changes dictated by the app's logic:

• in the Android app, the registration ID was cached in its preferences. Upon upgrade, I remove reg ID from the preferences to force re-registration, this time with GCM.
• the logic of passing the reg ID to the server got an extra boolean parameter - if this is a C2DM or GCM reg ID
• the logic of sending messages became conditional upon the said parameter.

Throwing out the C2DM logic completely out of the server would be unwise - not everyone upgrades their Android apps. The old, C2DM-enabled versions will be out in the wild for some time. And Google pledged to keep C2DM running in the short term. So message sending is conditional - depending on reg ID type, it sends either to GCM or to C2DM.

EDIT re: conditional logic:

if($RegID_Is_GCM)
{
    $Auth = GCM_Auth();
    $URL = $GCM_URL;
}
else
{
    $Auth = C2DM_AUTH();
    $URL = $C2DM_URL;
}