Package: android.frameworks.sensorservice@1.0
ISensorManager
interface ISensorManager
ISensorManager is an interface to manage sensors
This file provides a set of functions that uses ISensorManager to access and list hardware sensors.
Methods
getSensorList
getSensorList ()
generates (vec<SensorInfo> list, Result result)
Get the list of available sensors.
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list
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the list of available sensors, or empty on failure
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result
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OK on success or UNKNOWN_ERROR on failure
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getDefaultSensor
getDefaultSensor (SensorType type)
generates (SensorInfo sensor, Result result)
Get the default sensor of the specified type.
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sensor
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the default sensor for the given type, or undetermined value on failure.
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result
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OK on success or NOT_EXIST if no sensor of that type exists.
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createAshmemDirectChannel
createAshmemDirectChannel (memory mem, uint64_t size)
generates (IDirectReportChannel chan, Result result)
Create direct channel based on shared memory
Create a direct channel of DIRECT_CHANNEL_ASHMEM type to be used for configuring sensor direct report.
The memory layout looks as follows.These offsets can be found in android.hardware.sensors@1.0::SensorsEventFormatOffset.offset type name ----------------------------------- 0x0000 int32_t size(SensorsEventFormatOffset::TOTAL_LENGTH)0x0004 int32_t sensor report token 0x0008 int32_t type(see android.hardware.sensors@1.0::SensorType)0x000C uint32_t atomic counter 0x0010 int64_t timestamp(see android.hardware.sensors@1.0::Event)0x0018 float[16]/ data int64_t[8]0x0058 int32_t[4]reserved(set to zero)
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mem
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the shared memory to use, must be ashmem.
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size
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the intended size to be used.The following must be true:SensorsEventFormatOffset::TOTAL_LENGTH <= size <= mem.size
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chan
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The created channel, or NULL if failure.
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result
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OK if successful;BAD_VALUE if size>mem.size();BAD_VALUE if size<TOTAL_LENGTH;NO_MEMORY, NO_INIT, BAD_VALUE for underlying errors;UNKNOWN_ERROR if the underlying error is not recognized;UNKNOWN_ERROR if the underlying call returns channelId = 0
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createGrallocDirectChannel
createGrallocDirectChannel (handle buffer, uint64_t size)
generates (IDirectReportChannel chan, Result result)
Create direct channel based on hardware buffer
Create a direct channel of DIRECT_CHANNEL_GRALLOC type to be used for configuring sensor direct report.
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buffer
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file descriptor describing the gralloc buffer.
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size
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the intended size to be used, must be less than or equal to the size of the buffer.
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chan
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The created channel, or NULL if failure.
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result
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OK if successful;NO_MEMORY, NO_INIT, BAD_VALUE for underlying errors;UNKNOWN_ERROR if the underlying error is not recognized;UNKNOWN_ERROR if the underlying call returns channelId = 0
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createEventQueue
createEventQueue (IEventQueueCallback callback)
generates (IEventQueue queue, Result result)
Create a sensor event queue.
Create a sensor event queue with an IEventQueueCallback object.Subsequently, one can enable sensors on the event queue so that sensor events are passed via the specified callback.
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callback
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the callback to call on events.Must not be null.
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queue
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the event queue created.null on failure.
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result
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OK if successful, BAD_VALUE if callback is null, or other Result values for any underlying errors.
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