GattCharacteristic

java.lang.Object
- ohos.bluetooth.ble.GattCharacteristic

所有已实现的接口:

Sequenceable
```
public class GattCharacteristic
extends Object
implements Sequenceable
```
Represents the Bluetooth GATT characteristic.
The GATT characteristic is a basic data element for constructing a GATT service. The characteristic contains a value, additional information, and optional GATT descriptors.

从以下版本开始:

1

嵌套类概要
- 从接口继承的嵌套类/接口 ohos.utils.Sequenceable
  Sequenceable.Producer<T>

字段概要

字段
限定符和类型	字段	说明
`static int`	`PROPERTY_READ`	Indicates that the characteristic is readable.
`static int`	`PROPERTY_WRITE`	Indicates that the characteristic can be written.
`static int`	`PROPERTY_WRITE_NO_RESPONSE`	Indicates that the characteristic can be written with no response.

构造器概要

构造器
构造器	说明
`GattCharacteristic(UUID uuid, int permissions, int properties)`	A constructor used to create a `GattCharacteristic` instance.

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
`boolean`	`addDescriptor(GattDescriptor descriptor)`	Adds a `GattDescriptor` object to this characteristic.
`Optional<GattDescriptor>`	`getDescriptor(UUID uuid)`	Returns a `Optional` with a given UUID out of the list of descriptors for this characteristic.
`List<GattDescriptor>`	`getDescriptors()`	Obtains a list of `GattDescriptor` objects for this characteristic.
`int`	`getPermissions()`	Obtains the permissions for a characteristic.
`int`	`getProperties()`	Obtains the properties of a characteristic.
`GattService`	`getService()`	Obtains the `GattService` to which a characteristic belongs.
`UUID`	`getUuid()`	Obtains the UUID of a characteristic.
`byte[]`	`getValue()`	Obtains the stored value of a characteristic.
`boolean`	`marshalling(Parcel out)`	Marshals this `Sequenceable` object into a `Parcel`.
`boolean`	`setValue(byte[] values)`	Sets the stored value of a characteristic.
`boolean`	`unmarshalling(Parcel in)`	Unmarshals this `Sequenceable` object from a `Parcel`.

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

从接口继承的方法 ohos.utils.Sequenceable
hasFileDescriptor

- 字段详细资料
  - PROPERTY_READ
```
public static final int PROPERTY_READ
```
    Indicates that the characteristic is readable.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - PROPERTY_WRITE
```
public static final int PROPERTY_WRITE
```
    Indicates that the characteristic can be written.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
  - PROPERTY_WRITE_NO_RESPONSE
```
public static final int PROPERTY_WRITE_NO_RESPONSE
```
    Indicates that the characteristic can be written with no response.
    
    从以下版本开始:
    
    1
    
    另请参阅:
    
    常量字段值
- 构造器详细资料
  - GattCharacteristic
```
public GattCharacteristic(UUID uuid,
                          int permissions,
                          int properties)
```
    A constructor used to create a GattCharacteristic instance.
    
    参数:
    
    uuid - Indicates the UUID of the characteristic.
    
    permissions - Indicates the permissions of the characteristic in bit mask.
    
    properties - Indicates the properties of the characteristic in bit mask.
    
    从以下版本开始:
    
    1
- 方法详细资料
  - getUuid
```
public UUID getUuid()
```
    Obtains the UUID of a characteristic.
    
    返回:
    
    Returns the UUID of the characteristic.
    
    从以下版本开始:
    
    1
  - getPermissions
```
public int getPermissions()
```
    Obtains the permissions for a characteristic.
    
    返回:
    
    Returns the permissions for the characteristic.
    
    从以下版本开始:
    
    1
  - getProperties
```
public int getProperties()
```
    Obtains the properties of a characteristic.
    
    返回:
    
    Returns the properties of the characteristic.
    
    从以下版本开始:
    
    1
  - setValue
```
public boolean setValue(byte[] values)
```
    Sets the stored value of a characteristic.
    
    参数:
    
    values - Indicates the stored value of the characteristic.
    
    返回:
    
    Returns true if the stored value is set successfully; returns false otherwise.
    
    从以下版本开始:
    
    1
  - getValue
```
public byte[] getValue()
```
    Obtains the stored value of a characteristic.
    
    返回:
    
    Returns the stored value of the characteristic.
    
    从以下版本开始:
    
    1
  - getService
```
public GattService getService()
```
    Obtains the GattService to which a characteristic belongs.
    
    返回:
    
    Returns the GattService to which the characteristic belongs.
    
    从以下版本开始:
    
    1
  - addDescriptor
```
public boolean addDescriptor(GattDescriptor descriptor)
```
    Adds a GattDescriptor object to this characteristic.
    
    参数:
    
    descriptor - Indicates the descriptor to add.
    
    返回:
    
    Returns true if the descriptor is added to this characteristic; returns false otherwise.
  - getDescriptors
```
public List<GattDescriptor> getDescriptors()
```
    Obtains a list of GattDescriptor objects for this characteristic.
    
    返回:
    
    Returns a list of GattDescriptor objects for this characteristic.
  - getDescriptor
```
public Optional<GattDescriptor> getDescriptor(UUID uuid)
```
    Returns a Optional with a given UUID out of the list of descriptors for this characteristic.
    
    参数:
    
    uuid - Indicates the UUID of the descriptor.
    
    返回:
    
    Optional object or Optional#empty() if no descriptor with the given UUID was found.
  - marshalling
```
public boolean marshalling(Parcel out)
```
    从接口复制的说明: Sequenceable
    
    Marshals this Sequenceable object into a Parcel.
    
    指定者:
    
    marshalling 在接口中 Sequenceable
    
    参数:
    
    out - Indicates the Parcel object to which the Sequenceable object will be marshaled..
    
    返回:
    
    Returns true if the marshalling is successful; returns false otherwise.
  - unmarshalling
```
public boolean unmarshalling(Parcel in)
```
    从接口复制的说明: Sequenceable
    
    Unmarshals this Sequenceable object from a Parcel.
    
    指定者:
    
    unmarshalling 在接口中 Sequenceable
    
    参数:
    
    in - Indicates the Parcel object into which the Sequenceable object has been marshaled.
    
    返回:
    
    Returns true if the unmarshalling is successful; returns false otherwise.

类 GattCharacteristic

嵌套类概要

从接口继承的嵌套类/接口 ohos.utils.Sequenceable

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 ohos.utils.Sequenceable

字段详细资料

PROPERTY_READ

PROPERTY_WRITE

PROPERTY_WRITE_NO_RESPONSE

构造器详细资料

GattCharacteristic

方法详细资料

getUuid

getPermissions

getProperties

setValue

getValue

getService

addDescriptor

getDescriptors

getDescriptor

marshalling

unmarshalling