Apple believes in a world where you only want to communicate with friends that use the same operating system as you, but it does not have to be like that. Even if you use Android, you will probably have friends with iPhone, Windows Phone or even BlackBerry phones.
Apple messaging system, iMessages, is exclusive to the brand: find it in iPhone, iPad, iPod and Mac computers. There is no official application for any other platform, but that has not prevented that clever developers are curious forms of access. The last is called PieMessage and is open source.
PieMessage has a great small snag: and is that need to have a Mac on to server. What makes the application is basically to contact this server on the Mac, which in turn communicates with the iMessages of Mac application to send messages and notify new messages.
PieMessage is for now little more than a proof of concept, as you can see in the video below. Messages between your mobile phone and the server on the Mac are sent without any type of encryption and various functions are not available as the group messages or shipments of photos. The developer expects to receive support from the community for further improving the application.
If you qualify, for now There is no fast and easy-to-make it work. All material is available on Github, including instructions to make it work, but it is not a process suitable for all audiences because it is something advanced.
The author hopes that the Community take the witness and improve and complete your project, for which it says do not have enough time. Hopefully at some point there will be an easiest way to install this system both in Android as the server on Mac.