The simplest roulette in Java

I'm new to programming. I tried to make my roulette in Android Studio (I need to make it in Android Studio), but all my code did not give any result. Can anyone help me do this, or are there tutorials on creating? (It is necessary that there was just a Spin button and the balance for example $ 100 for one Spin was removed 10% and if the roulette stops on black you lost, if you won on green)