Question

我正在使用谷歌地图Android API实用程序库计算两点之间的距离，我已经看过文档，但我不知道我做错了什么。两点之间测得的距离要大得多。以下是我的代码

ParseGeoPoint requesterLocation = object.getParseGeoPoint("requesterLocation");
LatLng from = new LatLng(userLocation.getLatitude(),userLocation.getLongitude());
LatLng to = new LatLng(requesterLocation.getLatitude(),requesterLocation.getLongitude());

//Double distanceInKm = userLocation.distanceInKilometersTo(object.getParseGeoPoint("requesterLocation"));
Double dis = SphericalUtil.computeDistanceBetween(from,to);
Double disOneDp = (double) Math.round(dis * 10) / 10;
listViewContent.add(String.valueOf(disOneDp) + " Km");

结果是12627.6 km，应该是29.4km

Answer 1

以千米（km）为距离

private 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);
dist = dist * 60 * 1.1515;
return (dist);}

private double deg2rad(double deg) {
return (deg * Math.PI / 180.0);}

private double rad2deg(double rad) {
return (rad * 180.0 / Math.PI);}

Answer 2

这里以米（m）为单位获取距离 尝试这些方法将帮助您找到基于半径的距离，如果您正在寻找远距离尝试使用谷歌地图API距离GOOGLE MAP MATRIX API , ROAD BASED DISTANCE AND TIME TUTORIAL。！

private float distance(double currentlatitude, double currentlongitude, double originLat, double originLon) {

    float[] results = new float[1];
    Location.distanceBetween(currentlatitude, currentlongitude, originLat, originLon, results);
    float distanceInMeters = results[0];

    return distanceInMeters;
}

这里以米（m）为距离

Location startPoint=new Location("locationA");
startPoint.setLatitude(17.372102);
startPoint.setLongitude(78.484196);

Location endPoint=new Location("locationA");
endPoint.setLatitude(17.375775);
endPoint.setLongitude(78.469218);

double distance=startPoint.distanceTo(endPoint);

Answer 3

我认为您实际上做错了。据官方Google map utils documentation表示；

computeDistanceBetween(LatLng from, LatLng to)
以米为单位返回两个LatLng之间的距离。

结果以米为单位返回，因此您应该像这样将其转换为公里；

Double disInMeters = SphericalUtil.computeDistanceBetween(from,to);
Double disInKilometers = disInMeters / 1000;
// Double disOneDp = (double) Math.round(dis * 10) / 10;
listViewContent.add(String.valueOf(disInKilometers) + " Km");

如何使用computeDistanceBetween（）？

3 个答案: