如何将对象（在这种情况下为double）从片段传递到公共类？

Question

My situtation is that I am able to get the latitude and longitude in the onCreate of my Fragment. What I want to do is then send those values to my Sun public class but my attempts show that the those values are zero in the Sun Public class. My logcat shows however that those values are being generated in my fragment. This tells me that my location code does work , I just get those values into my public class.

Therefore, my question is whether there a way to send those values to a public class from a fragment or is it possible that the instance being called in my onCreateView is being called before the longitude and latitude are generated in onCreate? If that is the case is there a way to get the longitude and latitude values first before onCreateView is generated. Basically I need the location from the fragment to put in a calculation in my public sun class.The location in bold. From my understanding onCreate is generated before onCreateView I'm not sure why this would be the case. Here is my code:

Fragment

    public class TestFragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(true);


    requestPermission();

    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity());

    if (ActivityCompat.checkSelfPermission(getActivity(), ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)  {

        return;
    }
    mFusedLocationClient.getLastLocation().addOnSuccessListener(getActivity(), new OnSuccessListener<Location>() {
        @Override
        public void onSuccess(Location location) {

            if (location != null) {
                latitude = location.getLatitude();
                longitude = location.getLongitude();

                System.out.println("This is latitude:" + latitude);
                System.out.println("This is longitude:" + longitude);



            }

        }
    });


    if (getArguments() != null) {
        mParam1 = getArguments().getString(ARG_PARAM1);
        mParam2 = getArguments().getString(ARG_PARAM2);



    }




}

private void requestPermission(){
    ActivityCompat.requestPermissions(getActivity(),new String[]{ACCESS_FINE_LOCATION}, 1);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {


    Sun sunInstance = new Sun();
    sunInstance.SunmCalculation();

 return view; 

Public Class Sun

    public class Sun {
    private double M = 356.0470 + 0.9856002585 * PlanetVariableCalculations.getd2();
    private double w =  282.9404 +  4.70935e-5 * PlanetVariableCalculations.getd2();

  public void SunmCalculation() {
    if (M < 0) {
        while (M < 0) {
            M = M + 360;
        }

    } else if (M > 360) {
        while (M > 360) {
            M = M - 360;
        }
    }

    double L = w + M;
    SunSidereal(L);

}

private void SunSidereal(Double L){
     double Ls = L;
    double RAhours = 300;
    double GMST0 = Ls/15 +12;
    double SIDTIME = GMST0 + UTCValues.getutcComplete() + **Longitude**/15;
    double HA = SIDTIME - RAhours;

    System.out.println("This is SIDTIME:" + SIDTIME);
    System.out.println("This is HA:" + HA);
    System.out.println("This is the longitude: " + Longitude  );

}

}

Answer 1

Change the method signatures in the class like this:

public class Sun {
    private double M = 356.0470 + 0.9856002585 * PlanetVariableCalculations.getd2();
    private double w =  282.9404 +  4.70935e-5 * PlanetVariableCalculations.getd2();

    public void SunmCalculation(Double longtitude) {
        if (M < 0) {
            while (M < 0) {
                M = M + 360;
            }

        } else if (M > 360) {
            while (M > 360) {
                M = M - 360;
            }
        }

        double L = w + M;
        SunSidereal(L, longtitude);
    }

    private void SunSidereal(Double L, Double longtitude){
        double Ls = L;
        double RAhours = 300;
        double GMST0 = Ls/15 +12;
        double SIDTIME = GMST0 + UTCValues.getutcComplete() + longitude / 15;
        double HA = SIDTIME - RAhours;

        System.out.println("This is SIDTIME:" + SIDTIME);
        System.out.println("This is HA:" + HA);
        System.out.println("This is the longitude: " + Longitude  );
    }
}

You can create an object of the class Sun inside onSuccess() :

Sun sun = new Sun();

and call its SunmCalculation() method like this:

sun.SunmCalculation(longitude);