Is there any open source game networking engine for android? [closed]

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I am developing a multiplayer game for Android. There are plenty of game engines for android out there but having separate physics and networking engine would be great to reduce size and to brought two best engines in one single app. I looked at RakNet but Its not open source as well as not free.

I looked at some threads开发者_Go百科 here as well networking in android and Android networking , but there answer suggest low level interface rather than out-of-the-box networking library needed for games (handling lags, packet loss, etc).

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UPDATED

Hope these links are useful:

http://www.ibm.com/developerworks/opensource/library/os-android-networking/

http://www.exitgames.com/Photon/Mobile_Core

http://code.google.com/p/android-juice/

http://code.google.com/p/mages/

http://www.androidtechblog.info/multiplayer-social-gaming-platform-for-iphone-and-android-phones/

http://androiddoesitbetter.com/android-phones/multiplayer-social-gaming-platform-for-iphone-and-android-phones/