Geolocator 外掛

通過 Xamarin.iOS，Xamarin.Android 和 Windows 輕鬆訪問地理位置。

可用 Nuget：[ https://www.nuget.org/packages/Xam.Plugin.Geolocator/] [1 ]

XAML

 <StackLayout Spacing="10" Padding="10">
      <Button x:Name="buttonGetGPS" Text="Get GPS"/>
      <Label x:Name="labelGPS"/>
      <Button x:Name="buttonTrack" Text="Track Movements"/>
      <Label x:Name="labelGPSTrack"/>
      <Label Text=""/>
     
    </StackLayout>

碼

namespace PluginDemo
{
    public partial class GeolocatorPage : ContentPage
    {
        public GeolocatorPage()
        {
            InitializeComponent();
            buttonGetGPS.Clicked += async (sender, args) =>
            {
                try
                {
                    var locator = CrossGeolocator.Current;
                    locator.DesiredAccuracy = 1000;
                    labelGPS.Text = "Getting gps";

                    var position = await locator.GetPositionAsync(timeoutMilliseconds: 10000);

                    if (position == null)
                    {
                        labelGPS.Text = "null gps :(";
                        return;
                    }
                    labelGPS.Text = string.Format("Time: {0} \nLat: {1} \nLong: {2} \nAltitude: {3} \nAltitude Accuracy: {4} \nAccuracy: {5} \nHeading: {6} \nSpeed: {7}",
                        position.Timestamp, position.Latitude, position.Longitude,
                        position.Altitude, position.AltitudeAccuracy, position.Accuracy, position.Heading, position.Speed);

                }
                catch //(Exception ex)
                {
                   // Xamarin.Insights.Report(ex);
                   // await DisplayAlert("Uh oh", "Something went wrong, but don't worry we captured it in Xamarin Insights! Thanks.", "OK");
                }
            };

            buttonTrack.Clicked += async (object sender, EventArgs e) =>
            {
                try
                {
                    if (CrossGeolocator.Current.IsListening)
                    {
                        await CrossGeolocator.Current.StopListeningAsync();
                        labelGPSTrack.Text = "Stopped tracking";
                        buttonTrack.Text = "Stop Tracking";
                    }
                    else
                    {
                        if (await CrossGeolocator.Current.StartListeningAsync(30000, 0))
                        {
                            labelGPSTrack.Text = "Started tracking";
                            buttonTrack.Text = "Track Movements";
                        }
                    }
                }
                catch //(Exception ex)
                {
                    //Xamarin.Insights.Report(ex);
                   // await DisplayAlert("Uh oh", "Something went wrong, but don't worry we captured it in Xamarin Insights! Thanks.", "OK");
                }
            };
        }

        protected override void OnAppearing()
        {
            base.OnAppearing();
            try
            {
                CrossGeolocator.Current.PositionChanged += CrossGeolocator_Current_PositionChanged;
                CrossGeolocator.Current.PositionError += CrossGeolocator_Current_PositionError;
            }
            catch
            {
            }
        }

        void CrossGeolocator_Current_PositionError(object sender, Plugin.Geolocator.Abstractions.PositionErrorEventArgs e)
        {

            labelGPSTrack.Text = "Location error: " + e.Error.ToString();
        }

        void CrossGeolocator_Current_PositionChanged(object sender, Plugin.Geolocator.Abstractions.PositionEventArgs e)
        {
            var position = e.Position;
            labelGPSTrack.Text = string.Format("Time: {0} \nLat: {1} \nLong: {2} \nAltitude: {3} \nAltitude Accuracy: {4} \nAccuracy: {5} \nHeading: {6} \nSpeed: {7}",
                position.Timestamp, position.Latitude, position.Longitude,
                position.Altitude, position.AltitudeAccuracy, position.Accuracy, position.Heading, position.Speed);

        }

        protected override void OnDisappearing()
        {
            base.OnDisappearing();
            try
            {
                CrossGeolocator.Current.PositionChanged -= CrossGeolocator_Current_PositionChanged;
                CrossGeolocator.Current.PositionError -= CrossGeolocator_Current_PositionError;
            }
            catch
            {
            }
        }
    }
}