How to switch between screens?

Question

I\'m new in the android develop world. I created simple application and created a simple GUI with one button. If the user presses this button, I want to change the screen

Answer 1

For moving from one Activity to another Activity, you need to use Intent.

For example, you are having one activity "A" contains button and second activity "B", and you want to move from "A" to "B" then write:

Intent intent = new Intent(A.this, B.class);
startActivity(intent);

Practical and informative examples for the Intent are here: Android Intents - Tutorial