SensorAdditionalInfo

See also:

• SensorManager
• SensorEventCallback
• Sensor

TYPE_FRAME_BEGIN

public static final int TYPE_FRAME_BEGIN

Mark the beginning of a set of additional info frames.

Constant Value: 0 (0x00000000)

TYPE_FRAME_END

public static final int TYPE_FRAME_END

Mark the end of a set of additional info frames.

Constant Value: 1 (0x00000001)

TYPE_INTERNAL_TEMPERATURE

public static final int TYPE_INTERNAL_TEMPERATURE

Internal temperature. Sensor hardware device internal temperature. Payload: floatValues[0]: internal temperature in Celsius.

Constant Value: 65537 (0x00010001)

TYPE_SAMPLING

public static final int TYPE_SAMPLING

Sampling parameter. Describes the raw sample period and estimated jitter of sample time in terms of standard deviation. Payload: floatValues[0]: raw sample period in seconds. floatValues[1]: standard deviation of sampling period.

Constant Value: 65540 (0x00010004)

TYPE_SENSOR_PLACEMENT

public static final int TYPE_SENSOR_PLACEMENT

Sensor placement. Provides the orientation and location of the sensor element in terms of the Android coordinate system. This data is given as a 3x4 matrix consisting of a 3x3 rotation matrix (R) concatenated with a 3x1 location vector (t). The rotation matrix provides the orientation of the Android device coordinate frame relative to the local coordinate frame of the sensor. Note that assuming the axes conventions of the sensor are the same as Android, this is the inverse of the matrix applied to raw samples read from the sensor to convert them into the Android representation. The location vector represents the translation from the origin of the Android sensor coordinate system to the geometric center of the sensor, specified in millimeters (mm).

Payload: floatValues[0..11]: 3x4 matrix in row major order [R; t]

Example: This raw buffer: {0, 1, 0, 0, -1, 0, 0, 10, 0, 0, 1, -2.5}
Corresponds to this 3x4 matrix:

Orientation			Location
0	1	0	0
-1	0	0	10
0	0	1	-2.5

The sensor is oriented such that:

• The device X axis corresponds to the sensor's local -Y axis
• The device Y axis corresponds to the sensor's local X axis
• The device Z axis and sensor's local Z axis are equivalent

In other words, if viewing the origin of the Android coordinate system from the positive Z direction, the device coordinate frame is to be rotated 90° counter-clockwise about the Z axis to align with the sensor's local coordinate frame. Equivalently, a vector in the Android coordinate frame may be multiplied with R to rotate it 90° clockwise (270° counter-clockwise), yielding its representation in the sensor's coordinate frame. Relative to the origin of the Android coordinate system, the physical center of the sensor is located 10mm in the positive Y direction, and 2.5mm in the negative Z direction.

Constant Value: 65539 (0x00010003)

TYPE_UNTRACKED_DELAY

public static final int TYPE_UNTRACKED_DELAY

Untracked delay. Delays that are introduced by data processing, such as filtering, which is not taken into account by sensor timestamps. Payload: floatValues[0]: delay estimation in seconds floatValues[1]: delay estimation standard deviation

Constant Value: 65536 (0x00010000)

TYPE_VEC3_CALIBRATION

public static final int TYPE_VEC3_CALIBRATION

Vector calibration parameter. Calibration applied to a sensor with 3 elements vector output, such as accelerometer, gyro, etc. Payload: floatValues[0..11]: First 3 rows of a homogeneous matrix in row major order that captures any linear transformation, including rotation, scaling, shear, shift.

Constant Value: 65538 (0x00010002)

floatValues

public final float[] floatValues

Additional info payload data represented in float values. Depending on the type of information, this may be null.

intValues

public final int[] intValues

Additional info payload data represented in int values. Depending on the type of information, this may be null.

sensor

public final Sensor sensor

The sensor that generated this event. See SensorManager for details.

serial

public final int serial

Sequence number of frame for a certain type.

type

public final int type

Type of this additional info frame.