java - What is registration ID in Android and how does it creates internally? -


i'm new android , don't understand concepts.what registration id used in google cloud messaging?how creates internally - unique device id apple device token or else?how differs application id? may stupid question don't understand concepts.

is temporally id allows gcm services identify device-application, trough server can send messages gcm , redirect device. more info here

in advance copy text:

an id issued gcm servers android application allows receive messages. once android application has registration id, sends 3rd-party application server, uses identify each device has registered receive messages given android application. in other words, registration id tied particular android application running on particular device.


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