在地图上查找使用谷歌地图API V2两点之间的距离 [英] Find distance between two points on map using Google Map API V2

问题描述

我使用谷歌地图API V2在我的Andr​​oid应用程序，我能够显示地图，并把标记就可以了，但现在我坚持的，我需要找出两个标记或点之间的距离问题放置在地图上，我已经通过文档走了，但没有发现任何有用的在这种情况下。

I am using google map api v2 in my android application, I am able to show the map and put markers on it, but now I am stuck with the problem in which I need to find out the distance between two markers or points placed on map, I have already gone through the docs but didn't find anything helpful in this case.

如果有谁知道如何解决这个问题，请您帮助我。

If anyone knows how to solve this then please help me.

感谢

推荐答案

您可以使用，这将使你acurate的结果下面的方法

You can use the following method that will give you acurate result

public double CalculationByDistance(LatLng StartP, LatLng EndP) {
        int Radius = 6371;// radius of earth in Km
        double lat1 = StartP.latitude;
        double lat2 = EndP.latitude;
        double lon1 = StartP.longitude;
        double lon2 = EndP.longitude;
        double dLat = Math.toRadians(lat2 - lat1);
        double dLon = Math.toRadians(lon2 - lon1);
        double a = Math.sin(dLat / 2) * Math.sin(dLat / 2)
                + Math.cos(Math.toRadians(lat1))
                * Math.cos(Math.toRadians(lat2)) * Math.sin(dLon / 2)
                * Math.sin(dLon / 2);
        double c = 2 * Math.asin(Math.sqrt(a));
        double valueResult = Radius * c;
        double km = valueResult / 1;
        DecimalFormat newFormat = new DecimalFormat("####");
        int kmInDec = Integer.valueOf(newFormat.format(km));
        double meter = valueResult % 1000;
        int meterInDec = Integer.valueOf(newFormat.format(meter));
        Log.i("Radius Value", "" + valueResult + "   KM  " + kmInDec
                + " Meter   " + meterInDec);

        return Radius * c;
    }

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