Accelerometer Class

Accelerometer Class

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Provides Windows Phone applications access to the device’s accelerometer sensor.


Namespace:  Microsoft.Devices.Sensors
Assembly:  Microsoft.Devices.Sensors (in Microsoft.Devices.Sensors.dll)
XMLNS for XAML: Not mapped to an xmlns.

public sealed class Accelerometer : SensorBase<AccelerometerReading>
<Accelerometer .../>

The Accelerometer type exposes the following members.

Public methodAccelerometerCreates a new instance of the Accelerometer object.

Public propertyCurrentValueGets an object that implements ISensorReading that contains the current value of the sensor. This object will be one of the following types, depending on which sensor is being referenced: AccelerometerReading, CompassReading, GyroscopeReading, MotionReading. (Inherited from SensorBase<TSensorReading>.)
Public propertyIsDataValidGets the validity of the sensor’s data. (Inherited from SensorBase<TSensorReading>.)
Public propertyStatic memberIsSupportedGets or sets whether the device on which the application is running supports the accelerometer sensor.
Public propertyStateGets the current state of the accelerometer. The value is a member of the SensorState enumeration.
Public propertyTimeBetweenUpdatesGets or sets the preferred time between CurrentValueChanged events. (Inherited from SensorBase<TSensorReading>.)

Public methodDisposeReleases the managed and unmanaged resources used by the Accelerometer.
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from SensorBase<TSensorReading>.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodStartStarts data acquisition from the accelerometer.
Public methodStopStops data acquisition from the accelerometer.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

Public eventCurrentValueChangedOccurs when new data arrives from the sensor. (Inherited from SensorBase<TSensorReading>.)
Public eventReadingChanged Obsolete. Occurs when new data arrives from the accelerometer. This method is deprecated in the current release. Applications should use the CurrentValueChanged event of the SensorBase<TSensorReading> class instead.

The acceleration value is expressed as a 3-dimensional vector representing the acceleration components in the X, Y, and Z axes in gravitational units. The orientation of the acceleration is relative to the device such that -1g is applied in the Z-axis when the device is face up on a level table and -1g is applied to the Y-axis when the device is placed perpendicular to the table top.

The accelerometer sensor will detect the force of gravity along with any forces resulting from the movement of the phone. The MotionReading class uses multiple device sensors to separate the gravity vector from the device acceleration and allows you to easily determine the current attitude (yaw, pitch, and roll) of the device.


If you use this API in your app, you must specify the following capabilities in the app manifest. Otherwise, your app might not work correctly or it might exit unexpectedly.


Windows Phone 8, Windows Phone OS 7.1

For more info, see App capabilities and hardware requirements for Windows Phone 8.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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