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在Xamarin中如何获取设备位置以在Google Maps路线中使用

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我正在尝试使用某种深层链接从我的应用程序，打开谷歌 Map 与路线 . 我正在使用Xamarin便携式，我正在使用这个代码，这是有效的，但保持路由的起始位置，空白 .

var latDestiny = ClientMap.Latitude.ToString().Replace(",", ".");
var longiDestiny = ClientMap.Longitude.ToString().Replace(",", ".");

string destiny = "&destination=" + latDestino + "," + longiDestino;

var gMapsURL = "https://www.google.com/maps/dir/?api=1" + destiny;
GlobalLib.OpenExternalURL(gMapsURL);

我看到我需要在链接中添加这样的内容：

"&origin=" + myLatitude + "," + myLongitude;

但是我发现获得设备位置的所有方法都不清楚，看起来很复杂，有人有一个很好的解决方案来找到设备的纬度和长度吗？

google-maps xamarin xamarin.forms

1 回答

  • 1

    尝试这个想法:(我在我的应用程序中使用，它很好用）

    在便携式项目中创建 Interface :(是的，您需要在每个平台中以不同方式处理当前位置）

    namespace YourProject
{
    public interface ILibNative
    {                
        Position ReturnDevicePosition();
    }
}

    然后，创建一个派生iOS和Android项目内部接口的类：ANDROID：

    [assembly: Dependency(typeof(LibNative_DROID))]
namespace YourProject.Droid
{
    public class LibNative_DROID : ILibNative
    {

        public LibNative_DROID()
        {
        }

        public Position ReturnDevicePosition()
        {
            Position myPosition = new Position();
            try
            {
                Accuracy DesiredAccuracy = Accuracy.Fine;
                var locationManager = (LocationManager)Android.App.Application.Context.GetSystemService(Context.LocationService);
                if (locationManager.AllProviders.Count > 0)
                {
                    var criteria = new Criteria
                    {
                        Accuracy = DesiredAccuracy
                    };

                    var provider = locationManager.GetBestProvider(criteria, true);

                    myPosition = new Position(locationManager.GetLastKnownLocation(provider).Latitude, locationManager.GetLastKnownLocation(provider).Longitude);
                }
                return myPosition;
            }
            catch
            {
                return myPosition;
            }
        }
    }
}

    iOS版：

    [assembly: Dependency(typeof(LibNative_iOS))]
namespace YourProject.iOS
{
    public class LibNative_iOS : ILibNative
    {

        public LibNative_iOS()
        {
        }              

        public Position ReturnDevicePosition()
        {
            Position myPosition = new Position();
            try
            {
                if (CLLocationManager.LocationServicesEnabled)
                {
                    CLLocationManager locationManager = new CLLocationManager();
                    locationManager.RequestWhenInUseAuthorization();
                    var location = locationManager.Location;
                    myPosition = new Position(location.Coordinate.Latitude, location.Coordinate.Longitude);
                }
                return myPosition;
            }
            catch
            {
                return myPosition;
            }
        }
    }
}

    Don't forget to ask for enabled access to your location in the manifests (fine_location, coarse_location, gps, internet, etc...)

    然后，完成后，你可以这样做：

    var MyPosition = new Position();
MyPosition = DependencyService.Get<ILibNative>().ReturnDevicePosition(); 
var myLatitude = MyPosition.Latitude.ToString().Replace(",", ".");
var myLongitude = MyPosition.Longitude.ToString().Replace(",", ".");
string startingPoint = "&origin=" + myLatitude + "," + myLongitude;

    现在，只需将“startingPoint”添加到googleMaps网址即可...

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