NfcBarcode

Kotlin |Java

class NfcBarcode : TagTechnology

kotlin.Any
↳	android.nfc.tech.NfcBarcode

Provides access to tags containing just a barcode.

Acquire an NfcBarcode object using get.

Summary

Constants
static Int	`TYPE_KOVIO` Kovio Tags
static Int	`TYPE_UNKNOWN`

Public methods
Unit	`close()`
Unit	`connect()`
static NfcBarcode!	`get(tag: Tag!)` Get an instance of `NfcBarcode` for the given tag.
ByteArray!	`getBarcode()` Returns the barcode of an NfcBarcode tag.
Tag!	`getTag()`
Int	`getType()` Returns the NFC Barcode tag type.
Boolean	`isConnected()`

Constants

TYPE_KOVIO

Added in API level 17

static val TYPE_KOVIO: Int

Kovio Tags

Value: 1

TYPE_UNKNOWN

Added in API level 17

static val TYPE_UNKNOWN: Int

Value: -1

Public methods

close

Added in API level 17

fun close(): Unit

Exceptions
`java.lang.Exception`	if this resource cannot be closed
`java.io.IOException`	if an I/O error occurs
`java.lang.SecurityException`	if the tag object is reused after the tag has left the field

connect

Added in API level 17

fun connect(): Unit

Exceptions
`TagLostException`	if the tag leaves the field
`java.io.IOException`	if there is an I/O failure, or connect is canceled
`java.lang.SecurityException`	if the tag object is reused after the tag has left the field

get

Added in API level 17

static fun get(tag: Tag!): NfcBarcode!

Get an instance of NfcBarcode for the given tag.

Returns null if NfcBarcode was not enumerated in Tag#getTechList.

Does not cause any RF activity and does not block.

Parameters
`tag`	Tag!: an NfcBarcode compatible tag

Return
`NfcBarcode!`	NfcBarcode object

getBarcode

Added in API level 17

fun getBarcode(): ByteArray!

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. {@see RFC 3987}
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.

Return
`ByteArray!`	a byte array containing the barcode

See Also

getTag

Added in API level 17

fun getTag(): Tag!

Return
`Tag!`	the `Tag` backing this `TagTechnology` object.

getType

Added in API level 17

fun getType(): Int

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.

Return
`Int`	the NFC Barcode tag type

isConnected

Added in API level 17

fun isConnected(): Boolean

Return
`Boolean`	true if I/O operations should be possible