我正在构建一个跟踪我的跑步和走路的应用程序,但我在计算总距离时遇到了一些麻烦。计算两个位置之间的距离Android Studio
这里是我的代码的一部分,我得到的纬度和经度的值,我在哪里做我的距离计算。
public class SportsActicity {
protected Integer userId;
protected ArrayList<Position> route = new ArrayList<Position>();
public SportsActicity() {
this.userId = 1;
}
public void track(Double latitude, Double longitude, Double altitude, float speed, long chron) {
Date currentDate = new Date();
Position currentPosition = new Position(currentDate, latitude, longitude, altitude, speed, chron);
route.add(currentPosition);
// Float velocidade = (locat.getSpeed()*3600)/1000;
}
public double getTotalDistance() {
double distance = 0;
if(route.size() > 1) {
for (Integer i = 0; i < route.size() - 1; i++) {
distance += test(route.get(i).latitude, route.get(i).longitude, route.get(i + 1).latitude, route.get(i + 1).longitude);
}
}
return distance;
}
public Float test(Double lat1, Double lon1, Double lat2, Double lon2) {
double earthRadius = 6371;
double latDiff = Math.toRadians(lat2-lat1);
double lngDiff = Math.toRadians(lon2-lon1);
double a = Math.sin(latDiff /2) * Math.sin(latDiff /2) +
Math.cos(Math.toRadians(lat1))*
Math.cos(Math.toRadians(lat2))* Math.sin(lngDiff /2) *
Math.sin(lngDiff /2);
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
double distance = earthRadius * c;
int meterConversion = 1609;
return new Float(distance * meterConversion).floatValue();
}
如果我不动,总距离始终递增,约10(不知道是否是米),和我得到的值显示不正确。
http://i.stack.imgur.com/ssjIY.png我做了什么ü说,但我仍然得到“愚蠢”手机站在窗口的数值。距离的值是0-8-11,坐标是你可以在图像中看到的3个。问候 –