hello,

i developed a pure android/java library/components for peer-to-peer communication among a group of devices (>2). It supports wif, wifi direct, mobile hotspot and diff means for peer discovery and connection initiation (multicast, NFC tap, scanning QR code). You can find the source code here:

https://github.com/yigongliu/PeerDeviceNet_Src

More detailed API info:

http://www.peerdevicenet.net/api.html

There are a few samples: chat, draw-with-peer, rotate-cube-with-peer.

Have fun.

Yigong

It's not quite ready for prime time in the sense that documentation is not there, and most of my time has been spent on core features. But it's the only open source multiplayer engine that I'm aware of that isn't extremely dated. It based on Akka and jruby, which means you can code it in java, scala, or ruby all equally well, just depends on your preference.

Guess it would help to post the url:)

https://github.com/chrisochs/game_machine