摘要：
不解释，直接上代码： private double rad(double d){ return d * Math.PI / 180;}//radius : kmprivate void DrawCircle(Location center, double radius){ double EARTH_RADIUS = 6371; double lon = rad(center.Longitude); double lat = rad(center.Latitude); double d = radius / EARTH_RADIUS; polygon = new MapPolygon() { F 阅读全文
