Android/J2SE计算两个位置坐标之间的距离

public double getDistance(double lat1, double lon1, double lat2, double lon2) {　　float[] results=new float[1];　　Location.distanceBetween(lat1, lon1, lat2, lon2, results);　　return results[0];　　}

在其他设备若没有类似android的Location的distanceBetween方法开采用如下代码获取:

double distance(double lat1, double lon1, double lat2, double lon2) {　　double theta = lon1 - lon2;　　double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2))　　+ Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2))　　* Math.cos(deg2rad(theta));　　dist = Math.acos(dist);　　dist = rad2deg(dist);　　double miles = dist * 60 * 1.1515;　　return miles;　　}　　//将角度转换为弧度　　static double deg2rad(double degree) {　　return degree / 180 * Math.PI;　　}　　//将弧度转换为角度　　static double rad2deg(double radian) {　　return radian * 180 / Math.PI;　　}

最后的返回值单位为英里,1英里=1.609344公里 =0.8684海里

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