@Override
 public boolean onOptionsItemSelected(MenuItem item) {
   switch (item.getItemId()) {
     case QUIT_MENU_ID:
       GeoQuestApp.getInstance().terminateApp();
       break;
     case END_GAME_MENU_ID:
       GeoQuestApp.getInstance().endGame();
       break;
     case PREFS_MENU_ID:
       Intent settingsActivity = new Intent(getBaseContext(), Preferences.class);
       startActivity(settingsActivity);
       break;
   }
   return super.onOptionsItemSelected(item);
 }
 protected void onDestroy() {
   if (isFinishing()) {
     GeoQuestApp.getInstance().removeActivity(this);
   }
   super.onDestroy();
 }