Server on windows, clients on android

I am now trying to do a project which is, there will be a server on windows pc and there are some clients on android devices.The point is the server one should control the android devices.For exampl开发者_运维百科e it choose a image or video, send them to the clients and the clients play or show them.Remember the clients should be control by the server. So could anyone tell me a proper way to do that, which protocol should i use, how do i send the files to the clients and how do the clients react? I am thinking of using java for the server and of course the client will use android application. Thank you.

You might find Cloud to Device Messaging (c2dm) useful: http://code.google.com/android/c2dm/index.html

In essence, c2dm allows a remote server to send an Intent to an Android app. The device-side app can then respond to that intent to take the requested action. Chrome2phone works this way to open web links on a target device. http://code.google.com/p/chrometophone/