与众不同 windows phone (44)

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与众不同 windows phone (44) - 8.0 位置和地图

作者：webabcd


介绍
与众不同 windows phone 8.0 之 位置和地图

• 位置（GPS） - Location API
• 诺基亚地图

示例
1、演示新 Location API 的应用
GPS/Demo.xaml

<phone:PhoneApplicationPage
    x:Class="Demo.GPS.Demo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d"
    shell:SystemTray.IsVisible="True">

    <Grid x:Name="LayoutRoot">
        <StackPanel>
            
            <TextBlock Name="lblMsg" TextWrapping="Wrap" />
            
            <Button x:Name="btnDemo" Content="通过 GPS 获取当前位置" Click="btnDemo_Click" />
            
        </StackPanel>
    </Grid>


</phone:PhoneApplicationPage>

GPS/Demo.xaml.cs

/*
 * 演示新 Location API 的应用
 * 
 * wp7 时代的 Location API 也是支持的（能不用就别用了），参见：http://www.cnblogs.com/webabcd/archive/2012/08/09/2629636.html
 * 
 * 
 * 注：
 * 1、需要在 manifest 中增加配置 <Capability Name="ID_CAP_LOCATION" />
 * 2、在获取位置数据之前，需要提供隐私策略并得到用户的允许
 * 3、目前 wp 机器的位置提供程序都是 GPS
 */

using System;
using System.Windows;
using Microsoft.Phone.Controls;
using Windows.Devices.Geolocation;

namespace Demo.GPS
{
    public partial class Demo : PhoneApplicationPage
    {
        // 新的 Location API
        Geolocator geolocator;

        public Demo()
        {
            InitializeComponent();
        }

        protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
        {
            geolocator = new Geolocator();

            // 期望的精度级别（PositionAccuracy.Default 或 PositionAccuracy.High）
            geolocator.DesiredAccuracy = PositionAccuracy.High;
            // 期望的数据精度（米）
            geolocator.DesiredAccuracyInMeters = 50;

            // 移动距离超过此值后，触发 PositionChanged 事件
            geolocator.MovementThreshold = 100;
            // 在两次位置更新的时间点中间，请求位置数据的最小间隔（毫秒）
            geolocator.ReportInterval = 0;

            // 位置更新时触发的事件
            geolocator.PositionChanged += geolocator_PositionChanged;
            // 位置服务的状态发生改变时触发的事件
            geolocator.StatusChanged += geolocator_StatusChanged;

            base.OnNavigatedTo(e);
        }

        protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)
        {
            geolocator.PositionChanged -= geolocator_PositionChanged;
            geolocator.StatusChanged -= geolocator_StatusChanged;
            geolocator = null;

            base.OnNavigatedFrom(e);
        }

        private async void btnDemo_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                // 获取位置信息
                Geoposition geoposition = await geolocator.GetGeopositionAsync();

                lblMsg.Text = "位置精度（米）: " + geoposition.Coordinate.Accuracy.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "海拔精度（米）: " + geoposition.Coordinate.AltitudeAccuracy.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "纬度: " + geoposition.Coordinate.Latitude.ToString("0.00");
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "经度: " + geoposition.Coordinate.Longitude.ToString("0.00");
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "海拔（米）: " + geoposition.Coordinate.Altitude.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "行进方向（相对于正北的度数）: " + geoposition.Coordinate.Heading.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "行进速度（米/秒）: " + geoposition.Coordinate.Speed.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "确定位置的时间（UTC0）: " + geoposition.Coordinate.Timestamp.ToString("yyyy-MM-dd hh:mm:ss");
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "数据源（Satellite, WiFi, Cellular）: " + geoposition.Coordinate.PositionSource.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "卫星的位置精度衰减: " + geoposition.Coordinate.SatelliteData.PositionDilutionOfPrecision.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "卫星的水平精度衰减: " + geoposition.Coordinate.SatelliteData.HorizontalDilutionOfPrecision.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "卫星的垂直精度衰减: " + geoposition.Coordinate.SatelliteData.VerticalDilutionOfPrecision.ToString();
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += Environment.NewLine;

                if (geoposition.CivicAddress != null)
                {
                    lblMsg.Text = "国家名称: " + geoposition.CivicAddress.Country;
                    lblMsg.Text += Environment.NewLine;
                    lblMsg.Text = "省名称: " + geoposition.CivicAddress.State;
                    lblMsg.Text += Environment.NewLine;
                    lblMsg.Text = "城市名称: " + geoposition.CivicAddress.City;
                    lblMsg.Text += Environment.NewLine;
                    lblMsg.Text = "邮编: " + geoposition.CivicAddress.PostalCode;
                    lblMsg.Text += Environment.NewLine;
                    lblMsg.Text = "确定位置的时间（UTC0）: " + geoposition.CivicAddress.Timestamp;
                }
            }
            catch (Exception ex)
            {
                if ((uint)ex.HResult == 0x80004004)
                {
                    lblMsg.Text = "定位服务当前是关闭状态，请打开它";
                }
                else
                {
                    lblMsg.Text = ex.ToString();
                }
            }
        }

        // 位置服务的状态变化了
        void geolocator_StatusChanged(Geolocator sender, StatusChangedEventArgs args)
        {
            // 获取位置服务的状态
            PositionStatus status = geolocator.LocationStatus;

            // 获取位置服务的状态
            status = args.Status;

            switch (args.Status)
            {
                case PositionStatus.Disabled: // 位置提供程序已禁用，即用户尚未授予应用程序访问位置的权限
                    break;
                case PositionStatus.Initializing: // 初始化中
                    break;
                case PositionStatus.NoData: // 无有效数据
                    break;
                case PositionStatus.Ready: // 已经准备好了相关数据
                    break;
                case PositionStatus.NotAvailable: // 位置服务传感器不可用
                    break;
                case PositionStatus.NotInitialized: // 尚未初始化
                    break;
            }
        }

        // 位置变化了
        void geolocator_PositionChanged(Geolocator sender, PositionChangedEventArgs args)
        {
            this.Dispatcher.BeginInvoke(delegate()
            {
                Geoposition geoposition = args.Position;

                lblMsg.Text = "纬度: " + geoposition.Coordinate.Latitude.ToString("0.00");
                lblMsg.Text += Environment.NewLine;
                lblMsg.Text += "经度: " + geoposition.Coordinate.Longitude.ToString("0.00");
            });
        }
    }
}

2、演示诺基亚地图的应用
Map/Demo.xaml

<phone:PhoneApplicationPage
    x:Class="Demo.Map.Demo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d"
    shell:SystemTray.IsVisible="True"
    
    xmlns:maps="clr-namespace:Microsoft.Phone.Maps.Controls;assembly=Microsoft.Phone.Maps">

    <Grid x:Name="LayoutRoot" Background="Transparent">
        <StackPanel>

            <!--
                Microsoft.Phone.Maps.Controls.Map - 诺基亚地图
                    CenterChanged - 地图的中心点发生变化时触发的事件
            -->
            <maps:Map x:Name="map" Width="480" Height="440" CenterChanged="map_CenterChanged" />

            <StackPanel Orientation="Horizontal">
                <Button Name="btnRoad" Content="道路图" Click="btnRoad_Click" />
                <Button Name="btnAerial" Content="卫星图" Click="btnAerial_Click" />
            </StackPanel>
            <StackPanel Orientation="Horizontal">
                <Button Name="btnHybrid" Content="卫星图叠加道路图" Click="btnHybrid_Click" />
                <Button Name="btnTerrain" Content="自然地形叠加道路图" Click="btnTerrain_Click" />
            </StackPanel>

            <StackPanel Orientation="Horizontal">
                <Button Name="btnZoomIn" Content="放大" Click="btnZoomIn_Click" />
                <Button Name="btnZoomOut" Content="缩小" Click="btnZoomOut_Click" />
            </StackPanel>

            <StackPanel Orientation="Horizontal">
                <Button Name="btnMoveTop" Content="上移" Click="btnMoveTop_Click" />
                <Button Name="btnMoveBottom" Content="下移" Click="btnMoveBottom_Click" />
                <Button Name="btnMoveLeft" Content="左移" Click="btnMoveLeft_Click" />
                <Button Name="btnMoveRight" Content="右移" Click="btnMoveRight_Click" />
            </StackPanel>

            <TextBlock Name="lblMsg" />
            
        </StackPanel>
    </Grid>

</phone:PhoneApplicationPage>

Map/Demo.xaml.cs

/*
 * 演示诺基亚地图的应用
 * 
 * 
 * 本例仅用于说明诺基亚地图的基本使用方式，更多的内容，如：路线绘制，图钉等功能请参见 Microsoft.Phone.Maps.Controls.Map 控件文档和 Windows Phone Toolkit 文档
 * 
 * 
 * 注：
 * 1、需要在 manifest 中增加配置 <Capability Name="ID_CAP_MAP" />
 * 2、相关的 Launcher 参见本项目的 Launchers 文件夹内的地图相关的演示
 * 3、Bing 地图虽然仍可用，但是能不用就别用了
 * 4、关于 pin 之类的地图扩展，请使用 Windows Phone Toolkit，参见 http://phone.codeplex.com/
 * 
 * 
 * 另：与地图相关的协议说明如下，你的 app 如果支持这些协议将会在用户请求时启动（只有你一个 app 支持时）或出现在启动列表中（多个 app 支持时）
 * 1、驾车到指定地点：ms-drive-to:?destination.latitude=<latitude>&destination.longitude=<longitude>&destination.name=<name>
 * 2、散步到指定地点：ms-walk-to:?destination.latitude=<latitude>&destination.longitude<longitude>&destination.name=<name>
 */

using System.Windows;
using Microsoft.Phone.Controls;
using System.Device.Location;
using Microsoft.Phone.Maps.Controls;

namespace Demo.Map
{
    public partial class Demo : PhoneApplicationPage
    {
        // 地图的中心点，经纬度坐标
        private GeoCoordinate _center;
        // ZoomLevel: 1 - 最小, 20 - 最大
        private double _zoomLevel = 16;
        // Heading: 0 到 360 之间的任意数字。例：上为正北则为0，上为正西则为90，上为正南则为180，上为正东则为270
        private double _heading = 0;
        // Pitch: 0 到 180 之间的任意数字，代表地图绕 X 轴倾斜的角度（以实现 3D 效果）
        private double _pitch = 15;

        public Demo()
        {
            InitializeComponent();

            this.Loaded += Demo_Loaded;
        }

        void Demo_Loaded(object sender, RoutedEventArgs e)
        {
            map.LandmarksEnabled = true; // 是否显示地标（ZoomLevel 16 级以上才会显示）
            map.PedestrianFeaturesEnabled = true; // 是否显示步行街（ZoomLevel 16 级以上才会显示）
            map.ColorMode = MapColorMode.Light; // 颜色模式（Light 或 Dark）

            _center = new GeoCoordinate(39.909, 116.397);

            // map.Center = _center;
            // map.ZoomLevel = _zoomLevel;
            // map.Heading = _heading;
            // map.Pitch = _pitch;

            // SetView() - 通过指定的 Center, ZoomLevel, Heading, Pitch, MapAnimationKind 参数来显示地图
            // MapAnimationKind - 代表地图过渡时的动画效果。None:无动画；Linear:线性动画；Parabolic:抛物线动画
            map.SetView(_center, _zoomLevel, _heading, _pitch, MapAnimationKind.Parabolic);
        }

        private void btnRoad_Click(object sender, RoutedEventArgs e)
        {
            // 道路地图
            map.CartographicMode = MapCartographicMode.Road;
        }

        private void btnAerial_Click(object sender, RoutedEventArgs e)
        {
            // 卫星地图
            map.CartographicMode = MapCartographicMode.Aerial;
        }

        private void btnHybrid_Click(object sender, RoutedEventArgs e)
        {
            // 卫星地图上叠加道路地图
            map.CartographicMode = MapCartographicMode.Hybrid;
        }

        private void btnTerrain_Click(object sender, RoutedEventArgs e)
        {
            // 自然地形地图上叠加道路地图
            map.CartographicMode = MapCartographicMode.Terrain;
        }

        private void btnZoomIn_Click(object sender, RoutedEventArgs e)
        {
            // 放大地图
            map.SetView(_center, ++_zoomLevel, _heading, _pitch, MapAnimationKind.Linear);
        }

        private void btnZoomOut_Click(object sender, RoutedEventArgs e)
        {
            // 缩小地图
            map.SetView(_center, --_zoomLevel, _heading, _pitch, MapAnimationKind.Linear);
        }

        private void btnMoveTop_Click(object sender, RoutedEventArgs e)
        {
            // 上移地图，可以看到地图切换时线性过渡的效果（MapAnimationKind.Linear）
            _center = new GeoCoordinate(map.Center.Latitude + 0.1, map.Center.Longitude);
            map.SetView(_center, _zoomLevel, _heading, _pitch, MapAnimationKind.Linear);
        }

        private void btnMoveBottom_Click(object sender, RoutedEventArgs e)
        {
            // 下移地图，可以看到地图切换时线性过渡的效果（MapAnimationKind.Linear）
            _center = new GeoCoordinate(map.Center.Latitude -0.1, map.Center.Longitude);
            map.SetView(_center, _zoomLevel, _heading, _pitch, MapAnimationKind.Linear);
        }

        private void btnMoveLeft_Click(object sender, RoutedEventArgs e)
        {
            // 左移地图，可以看到地图切换时抛物线过渡的效果（MapAnimationKind.Parabolic）
            _center = new GeoCoordinate(map.Center.Latitude, map.Center.Longitude - 0.1);
            map.SetView(_center, _zoomLevel, _heading, _pitch, MapAnimationKind.Parabolic);
        }

        private void btnMoveRight_Click(object sender, RoutedEventArgs e)
        {
            // 右移地图，可以看到地图切换时抛物线过渡的效果（MapAnimationKind.Parabolic）
            _center = new GeoCoordinate(map.Center.Latitude, map.Center.Longitude + 0.1);
            map.SetView(_center, _zoomLevel, _heading, _pitch, MapAnimationKind.Parabolic);
        }

        private void map_CenterChanged(object sender, MapCenterChangedEventArgs e)
        {
            // CenterChanged - 中心点发生变化时触发的事件
            // 类似的事件还有：CartographicModeChanged, HeadingChanged, PitchChanged, ZoomLevelChanged, ViewChanging, ViewChanged 等等 
            lblMsg.Text = string.Format("经度：{0}，纬度{1}", map.Center.Longitude, map.Center.Latitude);
        }
    }
}

OK
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