Protocol used for sending push notification in Android
问题 I want to know which protocol is used to send push notification to android devices and which to send push notification requests to GCM. Whether it is HTTP, HTTPS or some thing else? 回答1: The protocols of the communication between the 3rd party server and GCM server (HTTP or XMPP) were already mentioned in the other answers. The protocol of the communication between the device and GCM server is not discussed in the GCM documentation, since you never have to access it directly as an Android