Can anyone suggest a resource about the structure or model of communication between an Android app and social media servers?

Question

Android

The customer asked to clearly explain to him the processes that occur when exchanging data in a social network (Facebook for example) when using an Android application. What happens after clicking "Send" in private messages or when a message is received. I'm interested in how the data is sent, in what packets, what popular encryption algorithms are used, how the keys are transmitted, how all this is processed on the server side (at least in general terms), how the feedback occurs. Perhaps how data from the social network is stored in the phone's memory.

Answer 1

what packages

Basically, the HTTP protocol is used, the response format is usually JSON, requests - JSON or URL encoding, all this can be seen using a sniffer (Fiddler, Wireshark, etc.), you can still decompile, disassemble the application itself.