Accelerometer Class

Reference

Definition

Namespace:: Windows.Devices.Sensors

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Edit

Represents an accelerometer sensor.

This sensor returns G-force values with respect to the x, y, and z axes.

For an example implementation, see the accelerometer sample.

public ref class Accelerometer sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class Accelerometer final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class Accelerometer

Public NotInheritable Class Accelerometer

Inheritance: Object Platform::Object IInspectable Accelerometer

Attributes: ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows requirements

Device family	Windows 10 (introduced in 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v1.0)

Remarks

Applications use the methods in this class to determine whether the sensor reading has changed or the device has been shaken.

Applications use the properties in this class to retrieve and adjust the sensor report interval.

Sensor data is provided relative to the device's fixed sensor coordinate system, and is independent of display orientation. For applications that rely on sensor data for input control or to manipulate elements on the screen, the developer must take current display orientation into account and compensate the data appropriately. For more info about the sensor coordinate system, see Sensor data and display orientation.

The following example demonstrates how a UWP app built with XAML and C# uses the GetDefault method to establish a connection to an accelerometer. If no integrated accelerometer is found, the method will return a null value.

_accelerometer = Accelerometer.GetDefault();

The following example demonstrates how a UWP app built with XAML registers a ReadingChanged event handler.

private void ScenarioEnable(object sender, RoutedEventArgs e)
{
    if (_accelerometer != null)
    {
        // Establish the report interval
        _accelerometer.ReportInterval = _desiredReportInterval;

        Window.Current.VisibilityChanged += new WindowVisibilityChangedEventHandler(VisibilityChanged);
        _accelerometer.ReadingChanged += new TypedEventHandler<Accelerometer, AccelerometerReadingChangedEventArgs>(ReadingChanged);

        ScenarioEnableButton.IsEnabled = false;
        ScenarioDisableButton.IsEnabled = true;
    }
    else
    {
        rootPage.NotifyUser("No accelerometer found", NotifyType.StatusMessage);
    }
}

The following example shows the ReadingChanged event handler.

async private void ReadingChanged(object sender, AccelerometerReadingChangedEventArgs e)
{
    await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        AccelerometerReading reading = e.Reading;
        ScenarioOutput_X.Text = String.Format("{0,5:0.00}", reading.AccelerationX);
        ScenarioOutput_Y.Text = String.Format("{0,5:0.00}", reading.AccelerationY);
        ScenarioOutput_Z.Text = String.Format("{0,5:0.00}", reading.AccelerationZ);
    });
}

Version history

Windows version	SDK version	Value added
1607	14393	GetDefault(AccelerometerReadingType)
1607	14393	ReadingType
1709	16299	FromIdAsync
1709	16299	GetDeviceSelector
2004	19041	ReportThreshold

Properties

DeviceId	Gets the device identifier.
MaxBatchSize	Gets the maximum number of events that can be batched by the sensor.
MinimumReportInterval	Gets the minimum report interval supported by the accelerometer.
ReadingTransform	Gets or sets the transformation that needs to be applied to sensor data. Transformations to be applied are tied to the display orientation with which to align the sensor data.
ReadingType	Gets the type of accelerometer sensor the is represented by this object.
ReportInterval	Gets or sets the current report interval for the accelerometer.
ReportLatency	Gets or sets the delay between batches of sensor information.
ReportThreshold	Gets the AccelerometerDataThreshold for the accelerometer sensor.

Methods

FromIdAsync(String)	Asynchronously obtains the sensor from its identifier.
GetCurrentReading()	Gets the current accelerometer reading.
GetDefault()	Returns the default accelerometer.
GetDefault(AccelerometerReadingType)	Returns the default accelerometer of a specific type of sensor. The possible accelerometer sensors are defined by AccelerometerReadingType.
GetDeviceSelector(AccelerometerReadingType)	Gets the device selector.

Events

ReadingChanged	Occurs each time the accelerometer reports a new sensor reading.
Shaken	Occurs when the accelerometer detects that the PC has been shaken.

Applies to

Share via