CarPropertyManager

CAR_SET_PROPERTY_ERROR_CODE_ACCESS_DENIED

public static final int CAR_SET_PROPERTY_ERROR_CODE_ACCESS_DENIED

Status to indicate that set operation failed because car denied access to the property.

Constant Value: 4 (0x00000004)

CAR_SET_PROPERTY_ERROR_CODE_INVALID_ARG

public static final int CAR_SET_PROPERTY_ERROR_CODE_INVALID_ARG

Status to indicate that set operation failed because of an invalid argument.

Constant Value: 2 (0x00000002)

CAR_SET_PROPERTY_ERROR_CODE_PROPERTY_NOT_AVAILABLE

public static final int CAR_SET_PROPERTY_ERROR_CODE_PROPERTY_NOT_AVAILABLE

Status to indicate that set operation failed because the property is not available.

Constant Value: 3 (0x00000003)

CAR_SET_PROPERTY_ERROR_CODE_TRY_AGAIN

public static final int CAR_SET_PROPERTY_ERROR_CODE_TRY_AGAIN

Status to indicate that set operation failed. Try it again.

Constant Value: 1 (0x00000001)

CAR_SET_PROPERTY_ERROR_CODE_UNKNOWN

public static final int CAR_SET_PROPERTY_ERROR_CODE_UNKNOWN

Status to indicate that set operation failed because of an general error in cars.

Constant Value: 5 (0x00000005)

SENSOR_RATE_FAST

public static final float SENSOR_RATE_FAST

Read sensors at the rate of 10 hertz

Constant Value: 10.0

SENSOR_RATE_FASTEST

public static final float SENSOR_RATE_FASTEST

Read sensors at the rate of 100 hertz

Constant Value: 100.0

SENSOR_RATE_NORMAL

public static final float SENSOR_RATE_NORMAL

Read sensors at the rate of 1 hertz

Constant Value: 1.0

SENSOR_RATE_ONCHANGE

public static final float SENSOR_RATE_ONCHANGE

Read ON_CHANGE sensors

Constant Value: 0.0

SENSOR_RATE_UI

public static final float SENSOR_RATE_UI

Read sensors at the rate of 5 hertz

Constant Value: 5.0

getAreaId

public int getAreaId (int propId, 
                int area)

Returns areaId contains the seletcted area for the property.

Parameters
propId	int: Property ID
area	int: Area enum such as Enums in VehicleAreaSeat.

Returns
int	AreaId contains the selected area for the property.

Throws
IllegalArgumentException	if the property is not available in the vehicle for the selected area.

getBooleanProperty

public boolean getBooleanProperty (int prop, 
                int area)

Returns value of a bool property

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Parameters
prop	int: Property ID to get
area	int: Area of the property to get

Returns
boolean	value of a bool property.

getCarPropertyConfig

public CarPropertyConfig<?> getCarPropertyConfig (int propId)

Get CarPropertyConfig by property Id.

Parameters
propId	int: Property ID

Returns
CarPropertyConfig<?>	CarPropertyConfig for the selected property. Null if the property is not available.

getFloatProperty

public float getFloatProperty (int prop, 
                int area)

Returns value of a float property

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Parameters
prop	int: Property ID to get
area	int: Area of the property to get

Returns
float

getIntArrayProperty

public int[] getIntArrayProperty (int prop, 
                int area)

Returns value of a integer array property

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Parameters
prop	int: Property ID to get
area	int: Zone of the property to get

Returns
int[]

getIntProperty

public int getIntProperty (int prop, 
                int area)

Returns value of a integer property

This method may take couple seconds to complete, so it needs to be called form an non-main thread.

Parameters
prop	int: Property ID to get
area	int: Zone of the property to get

Returns
int

getProperty

public CarPropertyValue<E> getProperty (Class<E> clazz, 
                int propId, 
                int areaId)

Return CarPropertyValue

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Clients that declare a ApplicationInfo.targetSdkVersion equal or later than Build.VERSION_CODES#R will receive the following exceptions when request is failed.

• CarInternalErrorException
• PropertyAccessDeniedSecurityException
• PropertyNotAvailableAndRetryException
• PropertyNotAvailableException
• IllegalArgumentException

Clients that declare a ApplicationInfo.targetSdkVersion earlier than Build.VERSION_CODES#R will receive the following exceptions when request is failed.

• IllegalStateException when there is an error detected in cars.
• IllegalArgumentException when the property in the areaId is not supplied.

Parameters
clazz	Class: The class object for the CarPropertyValue
propId	int: Property ID to get
areaId	int: Zone of the property to get

Returns
CarPropertyValue<E>	CarPropertyValue. Null if property's id is invalid.

Throws
	android.car.hardware.property.CarInternalErrorException CarInternalErrorException} when there is an error detected in cars.
	android.car.hardware.property.PropertyAccessDeniedSecurityException PropertyAccessDeniedSecurityException} when cars denied the access of the property.
	android.car.hardware.property.PropertyNotAvailableAndRetryException PropertyNotAvailableAndRetryException} when the property is temporarily not available and likely that retrying will be successful.
	android.car.hardware.property.PropertyNotAvailableException PropertyNotAvailableException} when the property is temporarily not available.
	java.lang.IllegalArgumentException IllegalArgumentException} when the property in the areaId is not supplied.

getProperty

public CarPropertyValue<E> getProperty (int propId, 
                int areaId)

Query CarPropertyValue with property id and areaId.

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Clients that declare a ApplicationInfo.targetSdkVersion equal or later than Build.VERSION_CODES#R will receive the following exceptions when request is failed.

• CarInternalErrorException
• PropertyAccessDeniedSecurityException
• PropertyNotAvailableAndRetryException
• PropertyNotAvailableException
• IllegalArgumentException

Clients that declare a ApplicationInfo.targetSdkVersion earlier than Build.VERSION_CODES#R will receive the following exceptions when request is failed.

• IllegalStateException when there is an error detected in cars.
• IllegalArgumentException when the property in the areaId is not supplied.

Parameters
propId	int: Property Id
areaId	int: areaId

Returns
CarPropertyValue<E>	CarPropertyValue. Null if property's id is invalid.

Throws
	android.car.hardware.property.CarInternalErrorException CarInternalErrorException} when there is an error detected in cars.
	android.car.hardware.property.PropertyAccessDeniedSecurityException PropertyAccessDeniedSecurityException} when cars denied the access of the property.
	android.car.hardware.property.PropertyNotAvailableAndRetryException PropertyNotAvailableAndRetryException} when the property is temporarily not available and likely that retrying will be successful.
	android.car.hardware.property.PropertyNotAvailableException PropertyNotAvailableException} when the property is temporarily not available.
	java.lang.IllegalArgumentException IllegalArgumentException} when the property in the areaId is not supplied.

getPropertyList

public List<CarPropertyConfig> getPropertyList (ArraySet<Integer> propertyIds)

Parameters
propertyIds	ArraySet: property ID list

Returns
List<CarPropertyConfig>	List of properties implemented by this car in given property ID list that application may access.

getPropertyList

public List<CarPropertyConfig> getPropertyList ()

Returns
List<CarPropertyConfig>	List of properties implemented by this car that the application may access.

isPropertyAvailable

public boolean isPropertyAvailable (int propId, 
                int area)

Check whether a given property is available or disabled based on the car's current state.

Parameters
propId	int: Property Id
area	int: AreaId of property

Returns
boolean	true if STATUS_AVAILABLE, false otherwise (eg STATUS_UNAVAILABLE)

registerCallback

public boolean registerCallback (CarPropertyManager.CarPropertyEventCallback callback, 
                int propertyId, 
                float rate)

Register CarPropertyEventCallback to get property updates. Multiple listeners can be registered for a single property or the same listener can be used for different properties. If the same listener is registered again for the same property, it will be updated to new rate.

Rate could be one of the following:

• CarPropertyManager#SENSOR_RATE_ONCHANGE
• CarPropertyManager#SENSOR_RATE_NORMAL
• CarPropertyManager#SENSOR_RATE_UI
• CarPropertyManager#SENSOR_RATE_FAST
• CarPropertyManager#SENSOR_RATE_FASTEST

Note:Rate has no effect if the property has one of the following change modes:

• CarPropertyConfig#VEHICLE_PROPERTY_CHANGE_MODE_STATIC
• CarPropertyConfig#VEHICLE_PROPERTY_CHANGE_MODE_ONCHANGE

See CarPropertyConfig#getChangeMode() for details. If rate is higher than CarPropertyConfig#getMaxSampleRate(), it will be registered with max sample rate. If rate is lower than CarPropertyConfig#getMinSampleRate(), it will be registered with min sample rate.

Parameters
callback	CarPropertyManager.CarPropertyEventCallback: CarPropertyEventCallback to be registered.
propertyId	int: PropertyId to subscribe
rate	float: how fast the property events are delivered in Hz. Value is between 0.0 and 100.0 inclusive

Returns
boolean	true if the listener is successfully registered.

Throws
SecurityException	if missing the appropriate permission.

setBooleanProperty

public void setBooleanProperty (int prop, 
                int areaId, 
                boolean val)

Modifies a property. If the property modification doesn't occur, an error event shall be generated and propagated back to the application.

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Parameters
prop	int: Property ID to modify
areaId	int: AreaId to apply the modification.
val	boolean: Value to set

setFloatProperty

public void setFloatProperty (int prop, 
                int areaId, 
                float val)

Set float value of property

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Parameters
prop	int: Property ID to modify
areaId	int: AreaId to apply the modification
val	float: Value to set

setIntProperty

public void setIntProperty (int prop, 
                int areaId, 
                int val)

Set int value of property

This method may take couple seconds to complete, so it needs to be called from an non-main thread.

Parameters
prop	int: Property ID to modify
areaId	int: AreaId to apply the modification
val	int: Value to set

setProperty

public void setProperty (Class<E> clazz, 
                int propId, 
                int areaId, 
                E val)

Set value of car property by areaId.

If multiple clients set a property for the same area id simultaneously, which one takes precedence is undefined. Typically, the last set operation (in the order that they are issued to the car's ECU) overrides the previous set operations.

This method may take couple seconds to complete, so it needs to be called form an non-main thread.

Clients that declare a ApplicationInfo.targetSdkVersion equal or later than Build.VERSION_CODES#R will receive the following exceptions when request is failed.

• CarInternalErrorException
• PropertyAccessDeniedSecurityException
• PropertyNotAvailableAndRetryException
• PropertyNotAvailableException
• IllegalArgumentException

Clients that declare a ApplicationInfo.targetSdkVersion earlier than Build.VERSION_CODES#R will receive the following exceptions when request is failed.

• RuntimeException when the property is temporarily not available.
• IllegalStateException when there is an error detected in cars.
• IllegalArgumentException when the property in the areaId is not supplied

Parameters
clazz	Class: The class object for the CarPropertyValue
propId	int: Property ID
areaId	int: areaId
val	E: Value of CarPropertyValue

Throws
	android.car.hardware.property.CarInternalErrorException CarInternalErrorException} when there is an error detected in cars.
	android.car.hardware.property.PropertyAccessDeniedSecurityException PropertyAccessDeniedSecurityException} when cars denied the access of the property.
	android.car.hardware.property.PropertyNotAvailableException PropertyNotAvailableException} when the property is temporarily not available.
	android.car.hardware.property.PropertyNotAvailableAndRetryException PropertyNotAvailableAndRetryException} when the property is temporarily not available and likely that retrying will be successful.
	java.lang.IllegalStateException IllegalStateException} when get an unexpected error code.
	java.lang.IllegalArgumentException IllegalArgumentException} when the property in the areaId is not supplied.

unregisterCallback

public void unregisterCallback (CarPropertyManager.CarPropertyEventCallback callback)

Stop getting property update for the given callback. If there are multiple registrations for this callback, all listening will be stopped.

Parameters
callback	CarPropertyManager.CarPropertyEventCallback: CarPropertyEventCallback to be unregistered.

unregisterCallback

public void unregisterCallback (CarPropertyManager.CarPropertyEventCallback callback, 
                int propertyId)

Stop getting property update for the given callback and property. If the same callback is used for other properties, those subscriptions will not be affected.

Parameters
callback	CarPropertyManager.CarPropertyEventCallback: CarPropertyEventCallback to be unregistered.
propertyId	int: PropertyId to be unregistered.