Apps Why doesn't this make a list?

[thyrgle]

public class AnApp extends ListActivity {
    /** Called when the activity is first created. */
    static final String[] MAIN_MENU = new String[] {
        "One", "Two", "Three"
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          
          setListAdapter(new ArrayAdapter<String>(this,
                  android.R.layout.simple_list_item_1, MAIN_MENU));
          getListView().setTextFilterEnabled(true);
    }
}

I adapting this tutorial to make a list: Hello, ListView | Android Developers

All I have done in my project is changed the AnApp class so it extends ListActivity (instead of Activity). Copy and pasted the onCreate method in the tutorial. Made a String called MAIN_MENU and replaced the COUNTRIES variable in the tutorial with MAIN_MENU.

My code is running with no errors or warnings, but no list appears, what could I be doing wrong?

 

[thyrgle]

Upon restarting my emulator, closing the window and running the program again, it seems that it was a glitch in the emulator, for now it works!