如果谷歌地图中的起点和终点相同,则获取行驶距离

如果用户从起点到终点旅行,您将通过以下代码获得距离。

private float distanceCal(double lat1, double lon1, double lat2, double lon2) {
        Location loc1 = new Location(provider);
        loc1.setLatitude(lat1);
        loc1.setLongitude(lon1);

    Location loc2 = new Location(provider);
    loc2.setLatitude(lat2);
    loc2.setLongitude(lon2);

    float distanceInMeters = loc1.distanceTo(loc2);
    return distanceInMeters;
}

 LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        Criteria criteria = new Criteria();
        String provider = locationManager.getBestProvider(criteria, false);

但在这里,当您移动时,您将获得当前位置,当您到达距离为0的目的地时,您将通知用户已到达目的地。

但当用户以自己的方式旅行并需要计算沿途旅行的距离时,我们需要获得最后一点和当前点之间的距离,并将其连续附加到总距离数据中。

尝试此代码

public double Distance(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;
    }