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I was wondering if anyone would be able to explain roughly how an application like LiveProfile is implemented?
How do the messages get pushed over the network from one device to another. How do they know the address of the device they wish to send it to? Is there a map of IPs and LiveProfile PINs?
Is it HTTP? Just the general technology used would be a great help in improving my understanding of this aspect of Android and mobile engineering.
I don’t know about that specific app, but there are several possibilities out there.
One is Google Labs’ C2DM: http://code.google.com/android/c2dm/
Also, check this post. It has a very detailed explanation: http://tokudu.com/2010/how-to-implement-push-notifications-for-android/
Here is another one with useful info: http://blog.boxedice.com/2010/10/07/android-push-notifications-tutorial/