Ways to improve UI design?

Hey, I spent A LOT of time learning about Android coding and I finally almost finished the code part of the project. The only thing that is holding me back from publishing my app is the bad user interface..

I have basic knowledge in Photoshop, and I tried to make good looking buttons and improve the UI of the app though I cant get a good interface.. I dont want to publish my app with the basic black background and gray buttons!

I dont want anything super fancy, I want a calm a开发者_JS百科nd simple design.

Can anyone suggest ways to make a simple UI for a simple app?

Thanks.

I'm assuming that you've read this article, you may read this but the design depends on your application... Search on google for more android UI samples