File	Doc	Category	Size	Date	Package
NfcV.java	API Doc	Android 5.1 API	4194	Thu Mar 12 22:22:10 GMT 2015	android.nfc.tech

NfcV

• java.lang.Object
  • BasicTagTechnology

Fields Summary
public static final String	EXTRA_RESP_FLAGS
public static final String	EXTRA_DSFID
private byte	mRespFlags
private byte	mDsfId

Constructors Summary
public NfcV(android.nfc.Tag tag) hide super(tag, TagTechnology.NFC_V); Bundle extras = tag.getTechExtras(TagTechnology.NFC_V); mRespFlags = extras.getByte(EXTRA_RESP_FLAGS); mDsfId = extras.getByte(EXTRA_DSFID);

Methods Summary
public static android.nfc.tech.NfcV	get(android.nfc.Tag tag) Get an instance of {@link NfcV} for the given tag. Returns null if {@link NfcV} was not enumerated in {@link Tag#getTechList}. This indicates the tag does not support NFC-V. Does not cause any RF activity and does not block. param tag an NFC-V compatible tag return NFC-V object if (!tag.hasTech(TagTechnology.NFC_V)) return null; try { return new NfcV(tag); } catch (RemoteException e) { return null; }
public byte	getDsfId() Return the DSF ID bytes from tag discovery. Does not cause any RF activity and does not block. return DSF ID bytes return mDsfId;
public int	getMaxTransceiveLength() Return the maximum number of bytes that can be sent with {@link #transceive}. return the maximum number of bytes that can be sent with {@link #transceive}. return getMaxTransceiveLengthInternal();
public byte	getResponseFlags() Return the Response Flag bytes from tag discovery. Does not cause any RF activity and does not block. return Response Flag bytes return mRespFlags;
public byte[]	transceive(byte[] data) Send raw NFC-V commands to the tag and receive the response. Applications must not append the CRC to the payload, it will be automatically calculated. The application does provide FLAGS, CMD and PARAMETER bytes. Use {@link #getMaxTransceiveLength} to retrieve the maximum amount of bytes that can be sent with {@link #transceive}. This is an I/O operation and will block until complete. It must not be called from the main application thread. A blocked call will be canceled with {@link IOException} if {@link #close} is called from another thread. Requires the {@link android.Manifest.permission#NFC} permission. param data bytes to send return bytes received in response throws TagLostException if the tag leaves the field throws IOException if there is an I/O failure, or this operation is canceled return transceive(data, true);