public Double calculateSpeed(NavigationPosition other) {
if (getTime() != null && other.getTime() != null) {
double interval =
abs(getTime().getTimeInMillis() - other.getTime().getTimeInMillis()) / 1000.0;
Double distance = calculateDistance(other);
if (distance != null && interval > 0.0) return distance / interval * 3.6;
}
return null;
}
public Long calculateTime(NavigationPosition other) {
if (getTime() != null && other.getTime() != null) {
return other.getTime().getTimeInMillis() - getTime().getTimeInMillis();
}
return null;
}