How to implement RFID features in our Android Application?

I want to develop an android app using android 4.0 API level, in my application I want to implement RFID features can anyone give me the idea or any code snippet regarding RFID feature implementation in android application.

Thanks to All.

Solution

Have a look at Nordic Id STIX uhf rfid reader.You can connect it to your phone using USB Ports. They will provide you SDK for Application development. Link : http://www.nordicid.com/eng/products/?group=7