How can I connect two Android device by socket without server

Question

I am trying to develop an android application that can exchange data on peer to peer connection with other devices without server. So please suggest how can I do this. Thank you

Answer 1

Your design has a big problem : ...

If there is no central server some android devices should act as client and others as server but this will not work in some situations:

• When the mobile telephony provider assigns private and non-public IP

• When the device is connected to a Wi-Fi network but no NAT rule is defined on the router.

In both cases the problem is that the listening port of the device that must act as server is unreachable.