Point wifi android application development issues

Functional requirements are as follows:
Make two Android phone has wifi connectivity. Similar point. Should not require the user to manually search for their IP, then you need to install a software interconnect them, playing games.

Because there are many other examples (such as Bluetooth connectivity games such as Monster Hunter psp platforms, etc., etc. ..), so I think it definitely needs to achieve, but it is now being no clue I hope to get tips, What library, pay attention to what.
Then, it is best to have a demo

Thank.
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It should be emphasized. Simply take the socket to do, then I will do.

But under normal circumstances how do you know each other's IP.

This is a troublesome thing, I do not have that experience.

The PSP game Monster Hunter can be used without having to know each other WIFI IP directly to automatically match so I am very fascinated him exactly how to achieve it<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
Reply:
AllJoyn, this thing is P2P is a sdk, android used to support wifi or Bluetooth communication.
https://www.alljoyn.org/
Simply put, is to detect the network status, and can automatically select and configure network connections, which point to point communications.
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Learning, good idea
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dinjay:

AllJoyn research experience do you have? Expect you to write a BLOG
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No one else studied it?
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My thoughts: UDP broadcast = "informed Mobile IP
TCP Communications
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references, 5th Floor jindaodaxia reply:

my thoughts: UDP broadcast = "informed Mobile IP
TCP communication

Prerequisite: limited to the LAN

Reply:
AllJoyn technology to achieve device-to-device between Bluetooth or WiFi file transfer. AllJoyn with something like Apple's Bonjour technology, they are being used to search in the local network devices such as printers, they also can transfer files in an office environment.
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wifi has two modes, one is the AP mode, also called infrastructure mode is a wireless router mode. Another point is called ad-hoc, peer support such as Bluetooth connectivity. Local Versus game is to use ad-hoc. Specific use google about ad-hoc.
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Who use technology to achieve what AllJoyn what examples demo it ..
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alljoyn not ...

He is a router-based ...


Then you must have root privileges through research, found that in order to do these things
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The outcome of it? Issued arrives. .
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The landlord later solved the problem yet, seeking to share