Android-根据两点间经纬度坐标，计算两点间距离

private static final double EARTH_RADIUS = 6378137;private static double rad(double d) {return d * Math.PI / 180.0;}        /** * 根据两点间经纬度坐标（double值），计算两点间距离， *  * @param lat1 * @param lng1 * @param lat2 * @param lng2 * @return 距离：单位为米 */public static double DistanceOfTwoPoints(double lat1,double lng1,  double lat2,double lng2) {double radLat1 = rad(lat1);double radLat2 = rad(lat2);double a = radLat1 - radLat2;double b = rad(lng1) - rad(lng2);double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)+ Math.cos(radLat1) * Math.cos(radLat2)* Math.pow(Math.sin(b / 2), 2)));s = s * EARTH_RADIUS;s = Math.round(s * 10000) / 10000;return s;}