Windows Phone 8, 添加Map控件

最新推荐文章于 2019-07-27 05:58:30 发布

转载最新推荐文章于 2019-07-27 05:58:30 发布 · 160 阅读

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原文链接：http://www.cnblogs.com/qixue/p/3242321.html

本文介绍如何在Windows Phone应用程序中添加地图控件，并显示用户的当前位置。包括在WMAppManifest.xml文件中启用位置权限，XAML中添加地图控件，以及使用后台代码实现定位。

摘要：

1. 添加Map控件到程序。

2. 在Map控件中显示您当前的位置。

内容：

首先在WMAppManifest.xml中的Capabilities选项卡中勾选如下两项：ID_CAP_MAP, ID_CAP_LOCATION

在XAML中添加Map控件：

        <!--ContentPanel - place additional content here-->
        <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
            <Controls:Map x:Name="mapWithMyLocation" />
        </Grid>

在后台代码中，添加Convert 类使能从Windows.Devices.Geolocation; 转换到 System.Device.Location;

    public static class CoordinateConverter
    {
        public static GeoCoordinate ConvertGeocoordinate(Geocoordinate geocoordinate)
        {
            return new GeoCoordinate
                (
                geocoordinate.Latitude,
                geocoordinate.Longitude,
                geocoordinate.Altitude ?? Double.NaN,
                geocoordinate.Accuracy,
                geocoordinate.AltitudeAccuracy ?? Double.NaN,
                geocoordinate.Speed ?? Double.NaN,
                geocoordinate.Heading ?? Double.NaN
                );
        }
    }

添加如下命名空间：

using System.Device.Location;
using Windows.Devices.Geolocation;
using System.Windows.Shapes;
using System.Windows.Media;
using Microsoft.Phone.Maps.Controls;

代码实例：

public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();

            // Sample code to localize the ApplicationBar
            //BuildLocalizedApplicationBar();
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            ShowMyLocationOntheMap();
            base.OnNavigatedTo(e);
        }


        private async void ShowMyLocationOntheMap()
        {
            Geolocator myGeolocator = new Geolocator();
            Geoposition myGeoposition = await myGeolocator.GetGeopositionAsync();
            Geocoordinate myGeocoordinate = myGeoposition.Coordinate;
            GeoCoordinate myGeoCoordinate1 =
                CoordinateConverter.ConvertGeocoordinate(myGeocoordinate);
            mapWithMyLocation.Center = myGeoCoordinate1;
            mapWithMyLocation.ZoomLevel = 17;

            // Create a small circle to mark the current location.
            Ellipse myCircle = new Ellipse();
            myCircle.Fill = new SolidColorBrush(Colors.Blue);
            myCircle.Height = 20;
            myCircle.Width = 20;
            myCircle.Opacity = 50;
            // Create a MapOverlay to contain the circle.
            MapOverlay myLocationOverlay = new MapOverlay();
            myLocationOverlay.Content = myCircle;
            myLocationOverlay.PositionOrigin = new Point(0.5, 0.5);
            myLocationOverlay.GeoCoordinate = myGeoCoordinate1;
            // Create a MapLayer to contain the MapOverlay.
            MapLayer myLocationLayer = new MapLayer();
            myLocationLayer.Add(myLocationOverlay);
            // Add the MapLayer to the Map.
            mapWithMyLocation.Layers.Add(myLocationLayer);

        }

    }