Android: Nothing past onCreate is happening

I got this class, and nothing inside the onCreate is happening? Does it not automatically get called upon initialization?

Code is below, Thanks alot! - Micheal

package com.michealbach.livedrops;

import java.io.IOException;
import java.util.List;
import java.util.Locale;

import android.app.Activity;

public class AnyClass extends Activity {

double latitude = 0; 
double longitude = 0;

String addressString = 开发者_C百科"Address Initialized";
String postalString = null;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    postalString = "Why doesn't this String change happen at all?";

  }


public double getLongitude() {
    return longitude;
}

public double getLatitude() {
    return latitude;
}

public String getAddress() {
    return addressString;
}
public String getPostal() {
    return postalString;
}
}

Doing this results in a "application has stopped unexpectedly. Please try again". If I initialize the string to some set of characters instead of null, it'll just stay that way. Should it not do what is inside the onCreate() and make that change?

onLocationChanged() is just a class method in your program, it's not conected to anything. You have to do

private final LocationListener locationListener = new LocationListener() {

        @Override
        public void onLocationChanged(Location location) {

             // Do stuff

            }


        @Override
        public void onProviderDisabled(String provider) {

        }

        @Override
        public void onProviderEnabled(String provider) {

        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {

        }

    };

And then in your onCreate()

LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
cr = new Criteria();
cr.setPowerRequirement(Criteria.POWER_LOW);
cr.setAccuracy(Criteria.ACCURACY_FINE);
provider = lm.getBestProvider(cr,true);
lm.requestLocationUpdates(provider, minTIME, minDISTANCE, locationListener );