Shared Preferences doesn't get updated

Shared Preferences doesn't get updated

I'm trying to make a world creator thing like in games and I am using
shared preferences to store the arrays and such. But there is a problem. I
am trying to update it from another class so I use static variables to do
so. But when I go back to the original class with the list view, I find
out that nothing has been updated. Any ideas? Here is the code. Oh and no
errors came in the logcat.
ListView class.
package you.don't.need-to-know;
import android.app.ListActivity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class WorldMenu extends ListActivity{
public static SharedPreferences prefs = null;
static String splitter;
String[] worldList;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
prefs = PreferenceManager.getDefaultSharedPreferences(this);
splitter = "Create World," + prefs.getString("worldString", "");
worldList = splitter.split(",");
setListAdapter(new ArrayAdapter<String>(WorldMenu.this,
android.R.layout.simple_list_item_1, worldList));
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
if(position == 0){
Intent openWorldNamer = new
Intent("you.don't.need-to-know");
startActivity(openWorldNamer);
}
}
}
The Updater:
package you.don't.need-to-know;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class WorldCreator extends Activity{
EditText worldNameEditor;
Button saver;
static String updater;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_worldcreator);
worldNameEditor = (EditText) findViewById(R.id.editText1);
saver = (Button) findViewById(R.id.button1);
updater = worldNameEditor.getText().toString() + ",";
saver.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Editor editor = WorldMenu.prefs.edit();
editor.putString("worldString", updater);
editor.commit();
Intent openListWorld = new
Intent("you.don't.need.to-know");
startActivity(openListWorld);
}
});
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}