Android - Short range communication (Like NFC) -

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when application running in foreground on 2 android smartphone's, want exchange data between them.

one phone connected internet , other phone might not connected. exchanging data using web server not possible.

i tried client server socket communication. if phone connected internet via router ip address not public (192 range) hence not able access it.

i tried exchange data using bluetooth there lot of prompts (like enable bluetooth, discoverability, pairing etc).

nfc option few phones support it. keep last option. there other possible means of peer peer communication.

if phone ip address not in public range, possible access (using nat or means) ?


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