模拟位置信息

计算两点间距离
方法一

double dist = 0.0; 
             double deltaLat = Math.toRadians(latVal2 - latVal1); 
             double deltaLon = Math.toRadians(lonVal2 - lonVal1); 
             latVal1 = Math.toRadians(latVal1); 
             latVal2 = Math.toRadians(latVal2); 
             lonVal1 = Math.toRadians(lonVal1); 
             lonVal2 = Math.toRadians(lonVal2); 
                double earthRadius = 6371; 
                double a = Math.sin(deltaLat/2) * Math.sin(deltaLat/2) + 
Math.cos(latVal1) * Math.cos(latVal2) * Math.sin(deltaLon/2) * Math.sin 
(deltaLon/2); 
                double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
                dist = earthRadius * c;

方法二

private double CalculateHaversineMI(double lat1, double long1, double lat2,double long2) {
    double dlong = (long2 - long1) * (Math.PI / 180.0f);
    double dlat = (lat2 - lat1) * (Math.PI / 180.0f);
    double a = Math.pow(Math.sin(dlat / 2.0), 2)
        + Math.cos(lat1 * (Math.PI / 180.0f))
        * Math.cos(lat2 * (Math.PI / 180.0f))
        * Math.pow(Math.sin(dlong / 2.0), 2);
    double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
    double d = 3956 * c;

    return d;
}

模拟位置信息的代码在附件里