程序包 ohos.nfc.oma

类 Reader

java.lang.Object

ohos.nfc.oma.Reader

public final class Reader
extends Object

Provides interfaces to obtain information about secure elements.

The interfaces can be used to obtain the name of a secure element, check whether the secure element is available, and enable a session on the secure element. The getReaders() method in SEService can be used to obtain all available secure elements on a device.

从以下版本开始:

1

SystemCapability

SystemCapability.Communication.NFC

字段概要

字段

限定符和类型	字段	说明
static int	TYPE_BASIC_CHANNEL	Indicates a basic channel.
static int	TYPE_LOGICAL_CHANNEL	Indicates a logical channel.

方法概要

限定符和类型	方法	说明
void	closeSessions()	Disables all sessions on a secure element.
String	getName()	Obtains the name of a secure element.
boolean	isSecureElementPresent()	Checks whether a secure element is available.
Optional<Session>	openSession()	Enables a session on a secure element.

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

TYPE_BASIC_CHANNEL

public static final int TYPE_BASIC_CHANNEL

Indicates a basic channel.

This constant is used to specify the type of a channel to be enabled.

从以下版本开始:

1

另请参阅:

常量字段值

TYPE_LOGICAL_CHANNEL

public static final int TYPE_LOGICAL_CHANNEL

Indicates a logical channel.

This constant is used to specify the type of a channel to be enabled.

从以下版本开始:

1

另请参阅:

常量字段值

方法详细资料

getName

public String getName()

Obtains the name of a secure element.

The name may be eSE or SIM.

返回:

Returns the name of the secure element.

从以下版本开始:

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isSecureElementPresent

public boolean isSecureElementPresent()

Checks whether a secure element is available.

Before performing operations on a secure element, check whether it is available.

返回:

Returns true if the secure element is available; returns false otherwise.

从以下版本开始:

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openSession

public Optional<Session> openSession()

Enables a session on a secure element.

返回:

Returns the session that has been enabled.

从以下版本开始:

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closeSessions

public void closeSessions()

Disables all sessions on a secure element.

Resources occupied by sessions are released when the sessions are disabled.

从以下版本开始:

4