Creating a Java app that can be used on my phone

Question

How do I finally turn my code into a simple app that can be run on phones.
pls a step by step procedure would be highly appreciated.

Answer 1

Learn Android

Answer 2

@Nwaburu Search 'Learn Android' in Play Store and you will find apps to learn more about it.

Answer 3

how? where? is there an app that explains it. which?

Answer 4

You have to Android Studio, some examples and optionally drivers for phone. Just search for some in Google, like "open sudoku Android". Good luck.