TagManager

java.lang.Object
- ohos.nfc.tag.TagManager

直接已知子类:

IsoDepTag, MifareClassicTag, MifareUltralightTag, NdefTag, NfcATag, NfcBTag, NfcFTag, NfcVTag
```
public abstract class TagManager
extends Object
```
Controls tag read and write.
Classes for different types of tags inherit from this abstract class to control connections to tags, read data from tags, and write data to tags.

从以下版本开始:

1

字段概要

字段
限定符和类型	字段	说明
`static int`	`ISO_DEP`	Indicates an ISO-DEP tag.
`static int`	`MIFARE_CLASSIC`	Indicates a MifareClassic tag.
`static int`	`MIFARE_ULTRALIGHT`	Indicates a MifareUltralight tag.
`static int`	`NDEF`	Indicated an NDEF tag.
`static int`	`NFC_A`	Indicates an NFC-A tag.
`static int`	`NFC_B`	Indicates an NFC-B tag.
`static int`	`NFC_F`	Indicates an NFC-F tag.
`static int`	`NFC_V`	Indicates an NFC-V tag.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`void`	`checkConnected()`	Checks whether this tag is connected or not.
`boolean`	`connectTag()`	Connects to a tag.
`int`	`getMaxSendLength()`	Queries the maximum length of data that can be sent to a tag.
`int`	`getSendDataTimeout()`	Queries the timeout duration (ms) for sending data to a tag.
`TagInfo`	`getTagInfo()`	Obtains the tag information.
`boolean`	`isTagConnected()`	Checks whether a connection has been set up with a tag.
`void`	`reset()`	Resets a connection with a tag and restores the default timeout duration for writing data to the tag.
`byte[]`	`sendData(byte[] data)`	Writes data to a tag.
`boolean`	`setSendDataTimeout(int timeout)`	Sets the timeout duration (ms) for sending data to a tag.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - ISO_DEP
```
public static final int ISO_DEP
```
    Indicates an ISO-DEP tag.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - MIFARE_CLASSIC
```
public static final int MIFARE_CLASSIC
```
    Indicates a MifareClassic tag.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    常量字段值
  - MIFARE_ULTRALIGHT
```
public static final int MIFARE_ULTRALIGHT
```
    Indicates a MifareUltralight tag.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    常量字段值
  - NDEF
```
public static final int NDEF
```
    Indicated an NDEF tag.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    常量字段值
  - NFC_A
```
public static final int NFC_A
```
    Indicates an NFC-A tag.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - NFC_B
```
public static final int NFC_B
```
    Indicates an NFC-B tag.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - NFC_F
```
public static final int NFC_F
```
    Indicates an NFC-F tag.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    常量字段值
  - NFC_V
```
public static final int NFC_V
```
    Indicates an NFC-V tag.
    
    从以下版本开始:
    
    3
    
    另请参阅:
    
    常量字段值
- 方法详细资料
  - getTagInfo
```
public TagInfo getTagInfo()
```
    Obtains the tag information.
    
    返回:
    
    Returns the tag information, which is a TagInfo object.
    
    从以下版本开始:
    
    1
  - connectTag
```
public boolean connectTag()
```
    Connects to a tag.
    This method must be called before data is read from or written to the tag.
    
    返回:
    
    Returns true if the connection is set up; returns false otherwise.
    
    从以下版本开始:
    
    1
  - reset
```
public void reset()
```
    Resets a connection with a tag and restores the default timeout duration for writing data to the tag.
    
    从以下版本开始:
    
    1
  - isTagConnected
```
public boolean isTagConnected()
```
    Checks whether a connection has been set up with a tag.
    
    返回:
    
    Returns true if a connection has been set up with the tag; returns false otherwise.
    
    从以下版本开始:
    
    1
  - setSendDataTimeout
```
public boolean setSendDataTimeout(int timeout)
```
    Sets the timeout duration (ms) for sending data to a tag.
    If data is not sent to the tag within the duration, data sending fails.
    
    参数:
    
    timeout - Indicates the timeout duration to be set.
    
    返回:
    
    Returns true if the setting is successful; returns false otherwise.
    
    从以下版本开始:
    
    1
  - getSendDataTimeout
```
public int getSendDataTimeout()
```
    Queries the timeout duration (ms) for sending data to a tag.
    
    返回:
    
    Returns the timeout duration.
    
    从以下版本开始:
    
    1
  - sendData
```
public byte[] sendData(byte[] data)
```
    Writes data to a tag.
    
    参数:
    
    data - Indicates the data to be written to the tag.
    
    返回:
    
    Returns bytes received in response. Or bytes with a length of 0 if the data fails to be written to the tag.
    
    从以下版本开始:
    
    1
  - getMaxSendLength
```
public int getMaxSendLength()
```
    Queries the maximum length of data that can be sent to a tag.
    
    返回:
    
    Returns the maximum length of the data to be sent to the tag.
    
    从以下版本开始:
    
    1
  - checkConnected
```
public void checkConnected()
```
    Checks whether this tag is connected or not.
    
    抛出:
    
    IllegalStateException - if tag is not connected.
    
    从以下版本开始:
    
    3

类 TagManager

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

ISO_DEP

MIFARE_CLASSIC

MIFARE_ULTRALIGHT

NDEF

NFC_A

NFC_B

NFC_F

NFC_V

方法详细资料

getTagInfo

connectTag

reset

isTagConnected

setSendDataTimeout

getSendDataTimeout

sendData

getMaxSendLength

checkConnected