How to get update current location in mainactivity instead of last location by using GPS?

Question

This is the gps class for mainactivity to call track user location

public class TrackGPS extends Service implements LocationListener{
    private final Context mContext;

       boolean checkGPS = false;

    boolean checkNetwork = false;

    boolean canGetLocation = false;

    Location loc;
   public double latitude;
    public double longitude;


    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1;


    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1;
    protected LocationManager locationManager;

    public TrackGPS(Context mContext) {
        this.mContext = mContext;
        getLocation();
    }

This is the get the location code for longitude and latitude

    private Location getLocation() {

        try {
            locationManager = (LocationManager) mContext
                    .getSystemService(LOCATION_SERVICE);

            // getting GPS status
            checkGPS = locationManager
                    .isProviderEnabled(LocationManager.GPS_PROVIDER);

            // getting network status
            checkNetwork = locationManager
                    .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

This is to check whether network and gps is turn on ?

            if (!checkGPS && !checkNetwork) {
                Toast.makeText(mContext, "No Service Provider Available", Toast.LENGTH_SHORT).show();
            } else {
                this.canGetLocation = true;
                // First get location from Network Provider
                if (checkNetwork) {
                    Toast.makeText(mContext, "Network", Toast.LENGTH_SHORT).show();

                    try {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("Network", "Network");
                        if (locationManager != null) {
                            loc = locationManager
                                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

                        }

                        if (loc != null) {
                            latitude = loc.getLatitude();
                            longitude = loc.getLongitude();
                        }
                    }
                    catch(SecurityException e){

                        Toast.makeText(TrackGPS.this, "please turn on gps", Toast.LENGTH_SHORT).show();

                    }
                }
            }
            // if GPS Enabled get lat/long using GPS Services
            if (checkGPS) {
                Toast.makeText(mContext,"GPS",Toast.LENGTH_SHORT).show();
                if (loc == null) {
                    try {
                        locationManager.requestLocationUpdates(
                                LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("GPS Enabled", "GPS Enabled");
                        if (locationManager != null) {
                            loc = locationManager
                                    .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            if (loc != null) {
                                latitude = loc.getLatitude();
                                longitude = loc.getLongitude();
                            }
                        }
                    } catch (SecurityException e) {

                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return loc;
    }

    public double getLongitude() {
        if (loc != null) {
            longitude = loc.getLongitude();
        }
        return longitude;
    }


 public double getLatitude() {
        if (loc != null) {
            latitude = loc.getLatitude();
        }
        return latitude;
    }

    public boolean canGetLocation() {
        return this.canGetLocation;
    }

    public void showSettingsAlert() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);


        alertDialog.setTitle("GPS Not Enabled");

        alertDialog.setMessage("Do you wants to turn On GPS");


        alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                mContext.startActivity(intent);
            }
        });


        alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });


        alertDialog.show();
    }


    public void stopUsingGPS() {

//        if (locationManager != null) {
//
//          locationManager.removeUpdates(TrackGPS.this);
//      }

        try {
            locationManager.removeUpdates(TrackGPS.this);
        } catch (SecurityException e) {
            Log.e("PERMISSION_EXCEPTION","PERMISSION_NOT_GRANTED");
        }
   }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

how to get the location updated longitude and latitude from mainactivity when every time is change ?

    @Override
    public void onLocationChanged(Location location) {

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

        }


    }


}

this is call in main activity to get the location

public void getLocation() {


        gps = new TrackGPS(econtacts.this);


        if (gps.canGetLocation()) {


            longitude = gps.getLongitude();
            latitude = gps.getLatitude();


           // Toast.makeText(getApplicationContext(), "Longitude:" + Double.toString(longitude) + "\nLatitude:" + Double.toString(latitude), Toast.LENGTH_SHORT).show();


        } else {

            gps.showSettingsAlert();

        }

    }