@Override
 public void onResumeFragments() {
   super.onResumeFragments();
   EmpireShieldManager.i.clearTextureCache();
 }
 @Override
 public void onStop() {
   super.onStop();
   starfield.onStop();
 }
 @Override
 public void onCreate(final Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   starfield = new StarfieldSceneManager(this);
 }