public void setScreen(Screen screen) {
if (screen == null) {
throw new IllegalArgumentException("Screen must not be null");
}
this.screen.pause();
this.screen.dispose();
screen.resume();
screen.update(0);
this.screen = screen;
}
public void onResume() {
super.onResume();
wakeLock.acquire();
screen.resume();
renderView.resume();
}