如何使用GeoCoordinateWatcher在Windows Phone中跟踪人的运动? [英] how to track movements of a person in windows phone using GeoCoordinateWatcher ?

问题描述

嗨

从一个特定的起点，我想使用Windows Phone 7中的GeoCoordinateWatcher跟踪人在经度，纬度和高度方面的运动

From a particular start point, I want to track a person's movement in terms of longitude, latitude and altitude using GeoCoordinateWatcher in windows phone 7

当那个人到达相同的起点(制作圆形或矩形之后)时，我想停止跟踪.

And when that person reaches to the same start point (after making circles or rectangles )I want to stop tracking.

有什么想法要实现吗?

推荐答案

using System.Device.Location;

//Class level variable
GeoCoordinateWatcher watcher;

//Load event of your page
private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
	watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.Default);
	if (watcher.Permission == GeoPositionPermission.Granted)
	
		watcher.MovementThreshold = 20;
	}
	watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);
	watcher.Start();
}

void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
{
	//1- Use e.Position.Location to identify the position
	
	//By use of a simple boolean variable you can identify the first reading 
	//Store that reading and take decission given the new position
	
	//2- When you want to stop monitoring simply call watcher.Stop();
}

确保WMAppManifest.xml文件中存在以下功能

Make sure the capability below is present in WMAppManifest.xml file

<Capability Name="ID_CAP_LOCATION"/>

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