Android Question Receive and check data from html add

Dear friends,

using

I can send html string to second device on some IP address. This is OK.

Now from the second device I am sending similar string to my device and I want receive this similar address and work with the string. For example:

Hoc can I receive this address on my device, please? How can I take IP, port and number of id for this address? Can you give me advice for some tutorial, please?

Best regards,
p4ppc