NfcBarcode

TYPE_KOVIO

int TYPE_KOVIO

Kovio Tags

Constant Value: 1 (0x00000001)

TYPE_UNKNOWN

int TYPE_UNKNOWN

Constant Value: -1 (0xffffffff)

close

void close ()

Disable I/O operations to the tag from this TagTechnology object, and release resources.

Also causes all blocked I/O operations on other thread to be canceled and return with IOException.

Requires the NFC permission.

connect

void connect ()

Enable I/O operations to the tag from this TagTechnology object.

May cause RF activity and may block. Must not be called from the main application thread. A blocked call will be canceled with IOException by calling close() from another thread.

Only one TagTechnology object can be connected to a Tag at a time.

Applications must call close() when I/O operations are complete.

Requires the NFC permission.

get

NfcBarcode get (Tag tag)

Get an instance of NfcBarcode for the given tag.

Returns null if NfcBarcode was not enumerated in getTechList().

Does not cause any RF activity and does not block.

getBarcode

byte[] getBarcode ()

Returns the barcode of an NfcBarcode tag.

Tags of TYPE_KOVIO return 16 bytes:

The first byte is 0x80 ORd with a manufacturer ID, corresponding to ISO/IEC 7816-6.

The second byte describes the payload data format. Defined data format types include the following:

• 0x00: Reserved for manufacturer assignment
• 0x01: 96-bit URL with "http://www." prefix
• 0x02: 96-bit URL with "https://www." prefix
• 0x03: 96-bit URL with "http://" prefix
• 0x04: 96-bit URL with "https://" prefix
• 0x05: 96-bit GS1 EPC
• 0x06-0xFF: reserved

The following 12 bytes are payload:

• In case of a URL payload, the payload is encoded in US-ASCII, following the limitations defined in RFC3987.
• In case of GS1 EPC data, see GS1 Electronic Product Code (EPC) Tag Data Standard (TDS) for more details.

The last 2 bytes comprise the CRC.

Does not cause any RF activity and does not block.

getTag

Tag getTag ()

Get the Tag object backing this TagTechnology object.

getType

int getType ()

Returns the NFC Barcode tag type.

Currently only one of TYPE_KOVIO or TYPE_UNKNOWN.

Does not cause any RF activity and does not block.

isConnected

boolean isConnected ()

Helper to indicate if I/O operations should be possible.

Returns true if connect() has completed, and close() has not been called, and the Tag is not known to be out of range.

Does not cause RF activity, and does not block.