ANDROID从大量的经度/纬度点上绘制一个图形页面的路径 [英] Android draw a path on a mapView from a large amount of longitude/latitude points

问题描述

我写这需要借鉴包括大量的GPS点路线（长+ LAT）一个应用程序。该点并拢，不遵守道路，简单地画出每个点之间的线是理想的。

I am writing a application that needs to draw a "route" comprised of lots of GPS points (long+lat). The points are close together and don't follow roads, simply drawing a line between each point is ideal.

当前实现我的很慢，因为我遍历所有的GPS坐标，并创建一个新的点和overlayitem在逐项叠加。这需要大约20秒，它加载所有的这些点，并吸引他们来的MapView。有，我可以从GPS坐标构建一系列线或点，并吸引他们到的MapView？一种方法

The current implementation I have is very slow as I am looping over all the GPS coordinates and creating a new Point and overlayitem in an itemized overlay. This takes around 20 seconds for it to load all of these points and draw them to the mapview. Is there a way in which I can construct a series of lines or point from the GPS coordinates and draw them onto the mapview?

目前的实施例：

 for each set of long+lats // removed to simplify
    point= new GeoPoint(latitude,longitude);
    overlayitem = new OverlayItem(point,"","");
    itemizedOverlay.addOverlay(overlayitem);
 mapOverlays.add(itemizedOverlay);
 mMapController.setCenter(point);

在此先感谢，希望我已经解释的不够好。

Thanks in advance, hope I've explained it well enough.

推荐答案

检查我在这里code样品回应：

Check my reply with code sample here:

<一个href="http://stackoverflow.com/questions/3109158/how-to-draw-a-path-on-a-map-using-kml-file/3109723#3109723">http://stackoverflow.com/questions/3109158/how-to-draw-a-path-on-a-map-using-kml-file/3109723#3109723

此示例解析一个KML文件（作为路由计算提供的谷歌地图或谷歌地球XML格式），并提请地缘点到地图上。如果您已经拥有地缘点的列表，你可以看一下drawPath（）方法;调整你通过地理COORDS参数的方式（我封装成，我叫NavigationDataSet一个简单的bean）。

This example parses a kml files (xml format as provided by Google Maps or Google Earth for route calculation) and draws the geo points onto the map. If you already have a list of geo points, you can just look at the drawPath() method; and adjust the way you pass the geo coords parameters to it (I encapsulated it into a simple bean that I named NavigationDataSet).

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