title: How to place an ad popup like scene in andengine
body: <p>I want to start placing ads in my andengine game and an ad to appear just before my result display screen (for example fruit ninja). Since My result screen is a scene and not an activity, I want an ad to popup after my game play and just before results and on button click the ad disappears. I think there is a class called popupscene, but i am not sure if that is to be used. Can someone help?</p>