[trotsky]

Oh, that is crappy. I had assumed it was both read and write, but it is in fact read only in 2.3 according to the API docs:

Provides access to Near Field Communication (NFC) functionality, allowing applications to read NDEF message in NFC tags. A "tag" may actually be another device that appears as a tag.

Here's a summary of the classes:

NfcAdapter - This represents the device's NFC adapter, which is your entry-point to performing NFC operations. You can acquire an instance with getDefaultAdapter().

NdefMessage - Represents an NDEF data message, which is the standard format in which "records" carrying data are transmitted between devices and tags. Your application can receive these messages from an ACTION_TAG_DISCOVERED intent.

NdefRecord - Represents a record, which is delivered in a NdefMessage and describes the type of data being shared and carries the data itself.

http://developer.android.com/reference/android/nfc/package-d...