I tried to find what NFC chips does the Google Nexus 7 support and what kinda actions can be performed but somehow I find no suitable information. I want to send an Intent via the NCF chip and start playing an audio for example, I got the Nexus 7 as a test device. Is that possible? What chips should be used? I have a programmable Experia SmartTag and I found some info how to program it, but it will only work on experia devices I think..
Taking a look at Android Beam specification, these are the valid "tech"s that can be detected with an Android device:
http://developer.android.com/reference/android/nfc/tech/package-summary.html
I've made an example app like yours, using Mifare Ultralights, and it've worked.