Question

我正在开发位置跟踪应用程序。一切都很好，但问题是当GPS运行时应用程序正在运行并显示错误的值时。所以我需要的是，如果GPS信号强度高或弱，文本标签应显示高和弱。当且仅当文本很高（GPS信号）时，应该运行应用程序。我已从此链接nokia community获取代码。与任何值或布尔值相比，是否可以跟踪GeoPositionAccuracy？

Answer 1

尝试使用GeoCoordinate的HorizontalAccuracy和VerticalAccuracy属性。

private void Watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e){
    if(Math.Sqrt(Math.Pow(e.Position.Location.HorizontalAccuracy,2) + Math.Pow(e.Position.Location.VerticalAccuracy,2)) < Tolerance_In_Meters)
        //accurate enough
    else
        //not accurate enough
}

GeoCoordinate Documentation

完全披露：我从未使用过这个。

Answer 2

您可以使用水平和垂直精度。

Geolocator geolocator = new Geolocator();
geolocator.DesiredAccuracy = PositionAccuracy.High;

Attention - DesiredAccuracy

geolocator.ReportInterval = ....; // or MovementThreshold
geolocator.PositionChanged += GeolocatorPositionChanged;

double YOUR_HORIZONTAL_ACCURACY = 20; // accuracy in metres
double YOUR_VERTICAL_ACCURACY = 20;   // accuracy in metres

private void GeolocatorPositionChanged(Geolocator sender, PositionChangedEventArgs args)
{
    GeoCoordinate coordinate = args.Position.Coordinate.ToGeoCoordinate(); // ToGeoCoordinate method is extension from the Windows Phone Toolkit

    if ((Double.IsNaN(coordinate.HorizontalAccuracy) || coordinate.HorizontalAccuracy > YOUR_HORIZONTAL_ACCURACY) && (Double.IsNaN(coordinate.VerticalAccuracy) || coordinate.VerticalAccuracy > YOUR_VERTICAL_ACCURACY))
    {
        // weak
    }

    else
    {
        // high
    }

如何在Windows Phone 8中显示GPS弱或高的信号？

2 个答案: