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anddev.org • View topic - Direct connection between two or more android phones

Direct connection between two or more android phones

Problems with WiFi, SQLite ,Bluetooth, WiMax, Proxies, etc...

Direct connection between two or more android phones

Postby metalmilitia » Tue Dec 07, 2010 3:41 pm

Hi guys!

I need to send information from one to another phone using 3g connection; following the ideal scenario:

Phone A
open the application
fill a form
click on "send to phone B"

Phone B (with the application in the background)
receive the request
execute the request associated code
send a reply to phone B

I just googled around but there are a lot of people that reported to me that such a thing is not possible because 3g network are NATed.
I perfectly know what is NAT and the reason behind nating on a 3g network but so I can't understand how applications like gtalk works.
I read that Gtalk use a server in the middle but anyway I can't understand how the server can communicate with the phone B for delivering the information received by the phone A since the server have only the public IP address of phone B (maybe shared with thousands of other devices)

Can someone explain me how does it works?

Since as for me have a server in the middle of the communication entities is not a problem how can I redesign the communication diagram?

Thanks!
metalmilitia
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Re: Direct connection between two or more android phones

Postby Somnevayus » Sat Oct 05, 2013 8:50 pm

Very good and informative exchange .. Thank you!
Somnevayus
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