程序包 ohos.nfc.tag

类 MifareUltralightTag

java.lang.Object

ohos.nfc.tag.TagManager

ohos.nfc.tag.MifareUltralightTag

public class MifareUltralightTag
extends TagManager

Provides interfaces to create a MIFARE Ultralight tag and perform I/O operations on the tag.

This class inherits from the TagManager abstract class and provides interfaces to create a MIFARE Ultralight tag, obtain the tag type, and read and write pages of the tag.

从以下版本开始:

3

SystemCapability

SystemCapability.Communication.NFC

字段概要

字段

限定符和类型	字段	说明
static int	MIFARE_ULTRALIGHT	A MIFARE Ultralight tag.
static int	MIFARE_ULTRALIGHT_C	A MIFARE Ultralight C tag.
static int	MIFARE_UNKNOWN	A MIFARE Ultralight tag of an unknown type.

从类继承的字段 ohos.nfc.tag.TagManager

ISO_DEP, MIFARE_CLASSIC, NDEF, NFC_A, NFC_B, NFC_F, NFC_V

方法概要

限定符和类型	方法	说明
static MifareUltralightTag	getInstance(TagInfo tagInfo)	Obtains a MifareUltralightTag object based on the given tag information.
int	getMifareType()	Obtains the type of the MIFARE Ultralight tag.
byte[]	readFourPages(int pageOffset)	Reads four pages (16 bytes) starting from the specified page offset.
void	writeOnePage(int pageOffset, byte[] data)	Writes data to the specified page.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从类继承的方法 ohos.nfc.tag.TagManager

checkConnected, connectTag, getMaxSendLength, getSendDataTimeout, getTagInfo, isTagConnected, reset, sendData, setSendDataTimeout

字段详细资料

MIFARE_ULTRALIGHT

public static final int MIFARE_ULTRALIGHT

A MIFARE Ultralight tag.

从以下版本开始:

3

另请参阅:

常量字段值

MIFARE_ULTRALIGHT_C

public static final int MIFARE_ULTRALIGHT_C

A MIFARE Ultralight C tag.

从以下版本开始:

3

另请参阅:

常量字段值

MIFARE_UNKNOWN

public static final int MIFARE_UNKNOWN

A MIFARE Ultralight tag of an unknown type.

从以下版本开始:

3

另请参阅:

常量字段值

方法详细资料

getInstance

public static MifareUltralightTag getInstance(TagInfo tagInfo)

Obtains a MifareUltralightTag object based on the given tag information.

During tag reading, if the tag supports the NFC-A technology, a MifareUltralightTag object will be created based on the given tag information.

参数:

tagInfo - Indicates the information about the given tag.

返回:

Returns the MifareUltralightTag object.

从以下版本开始:

3

getMifareType

public int getMifareType()

Obtains the type of the MIFARE Ultralight tag. The type can be MIFARE_ULTRALIGHT, MIFARE_ULTRALIGHT_C, or MIFARE_UNKNOWN.

返回:

Returns the type of the MIFARE Ultralight tag.

从以下版本开始:

3

readFourPages

public byte[] readFourPages(int pageOffset)
                     throws IOException

Reads four pages (16 bytes) starting from the specified page offset.

参数:

pageOffset - Indicates the specified page offset, starting from 0.

返回:

Returns the four pages (16 bytes) that are read.

抛出:

IOException - if there is an I/O failure, or the operation is canceled.

从以下版本开始:

3

writeOnePage

public void writeOnePage(int pageOffset,
                         byte[] data)
                  throws IOException

Writes data to the specified page.

参数:

pageOffset - Indicates the offset of the page, starting from 0.

data - Indicates the data to write to the page.

抛出:

IOException - if there is an I/O failure, or the operation is canceled.

从以下版本开始:

3