Android: Nothing past onCreate is happening.

Question

Hi guys,

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 = "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?

Answer 1

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 );