Tutorial NFC for Android

Near Field Communication (NFC) is a set of short-range wireless technologies, typically requiring a distance of 4cm or less. NFC operates at 13.56mhz, and at rates ranging from 106 kbit/s to 848 kbit/s.

https://code.google.com/p/openmobster/wiki/NFC

Bad news: NFC is not supported by emulator (yet) so a NFC capable device is required.