Android system NFC framework introduction and develop guide

EXTRA_NDEF_MESSAGES (optional): An array of NDEF

messages parsed from the tag. This extra is mandatory

on intents.

{@link android.nfc.NfcAdapter#EXTRA_ID

(optional): The low-level ID of the tag. To obtain these extras, check to see if your activity was launched with one of the NFC intents to ensure that a tag was scanned, and then obtain the extras out of the intent. The following

example checks for the ACTION_NDEF_DISCOVERED intent and gets the NDEF messages from an intent extra.

Alternatively, you can obtain a Tag object from the intent, which will contain the payload and allow you to enumerate the tag's technologies:

Creating Common Types of NDEF Records

This section describes how to create common types of NDEF records to help you when writing to NFC tags or sending data with Android Beam. It also describes how to create the corresponding