使用谷歌Places API的发现距离在公里的Android(find Distance in ki

我想显示在我写了下面的代码公里，两个地距离：

hyd(17.38,78.48) eluru(16.7,81.1)
 private String getDistance(double lat1, double lat2, double lon1, double lon2) {
               double Radius = 6371;
               double dLat = Math.toRadians(lat2 - lat1);
                double dLon = Math.toRadians(lon2 - lon1);
                double a = Math.sin(dLat / 5) * Math.sin(dLat / 5)
                        + Math.cos(Math.toRadians(lat1))
                        * Math.cos(Math.toRadians(lat2)) * Math.sin(dLon / 5)
                        * Math.sin(dLon / 5);
                double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
                double km = Radius * c;

                String kms=Double.toString(km);
                return kms;

                }

输出= 2995.8772

正确O / P =330公里

我怎样才能在Android的感谢两两地之间的精确距离提前.....

Answer 1:

使用此方法

public static void distanceBetween (double startLatitude, double startLongitude, double endLatitude, double endLongitude, float[] results);

例

 public static double CalculateDistance(double lat1, double lng1, double lat2, double lng2) {
 float[] result=new float[1];
 Location.distanceBetween (lat1,lng1,lat2, lng2,  result);
 return (double)result[0]/1000; // in km
}

文章来源: find Distance in kilometers in Android using google places Api