Proximity sensor

Tip

This article covers Uno-specific information for ProximitySensor. For a full description of the feature and instructions on using it, see ProximitySensor Class.

• The Windows.Devices.Sensors.ProximitySensor class allows measuring distance of an object in millimeters.

Using ProximitySensor with Uno

• The sensor is currently only available on Android.
• To retrieve the available sensors, DeviceInformation.FindAllAsync method is used.

Example

Capturing sensor readings

var selector = ProximitySensor.GetDeviceSelector();
var devices = await DeviceInformation.FindAllAsync(selector);
var device = devices.FirstOrDefault();
if (device is not null)
{
    var proximitySensor = ProximitySensor.FromId(device.Id);
    proximitySensor.ReadingChanged += ProximitySensor_ReadingChanged;
}

// ..

private async void ProximitySensor_ReadingChanged(ProximitySensor sender, ProximitySensorReadingChangedEventArgs args)
{
    await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        uint? distanceInMillimeters = args.Reading.DistanceInMillimeters;
        bool isDetected = args.Reading.IsDetected;
    });
}

Unsubscribing from the readings

proximitySensor.ReadingChanged -= ProximitySensor_ReadingChanged;