To send a push message from Android from the server, two pieces of information are required:
- A Sender ID, AKA project identifier, is used by the application side. For each application there should be no more than one identifier.
- Server key for communication with GCM. There can be several Server Keys for one application, so that if someone is compromised, it can be replaced.
The common wisdom is that the sender ID must be explicit on my project page, but I cannot find it - any idea where this is?
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