I want to write a p2p program/server-client program on android/ios, how could I make the program run in the background?
The purpose of this program is
1 : Send some messages to the peers parents when their sons slide the id card.
2 : This program should be able to work in the background, in other words, when the students slide their cards, the messages should pop up on the clients(parents) side.
Thanks a lot
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