Game state gives black screen

I am working on a game for android and when I implemented the different game states from Lunar Lander and Jet Boy it gives me a black screen. Before I added them it would draw and run how I needed it to. How do I ge开发者_如何学JAVAt the game states to work with my game program.

Thanks for any help or advice.

For anyone else who might run into this problem you have to add the state functions inside of the class files that call the SurfaceView i.e.: LunarLander or JetBoy.