public String getDistanceUnitString() {
String units = _preferences.distance_units().get();
if (units.equalsIgnoreCase("m")) return "Miles";
return "km";
}
public double distance(double kms) {
String units = _preferences.distance_units().get();
if (units.equalsIgnoreCase("m")) return kilometersToMiles(kms);
return kms;
}