public double getDistance(double startLat,double startLong,double endLat,double endLong){
//startLong 起始坐标点经度
//startLat 起始坐标点维度
//endLong 目标坐标点经度
//endLat 目标坐标点维度
double lat1 = (Math.PI/180)*startLat;
double lat2 = (Math.PI/180)*endLat;
double lon1 = (Math.PI/180)*startLong;
double lon2 = (Math.PI/180)*endLong;
//地球半径
double R = 6371;
//两点间距离 km,如果想要米的话,结果*1000就可以了
double d = Math.acos(Math.sin(lat1)*Math.sin(lat2)+Math.cos(lat1)*Math.cos(lat2)*Math.cos(lon2-lon1))*R;
//double s=R*Math.acos(Math.cos(lat1*Math.PI/180 ) * Math.cos(lat2*Math.PI/180) * Math.cos(lng1*Math.PI/180 -lng2*Math.PI/180) + Math.sin(lat1*Math.PI/180 ) * Math.sin(lat2*Math.PI/180));
return d*1000;
}