How to display the value of a variable on the screen?

Question

I know this is very basic question, but I need to know, how I can display the contents of a variable on the screen.

Do I use a textview in my layout?

I have

Answer 1

If you have a list on the screen , then to not lose the list and still show change use , taking @Matt's example.

TextView textView = (TextView) findViewById(R.id.textViewName);
textView.setText("text you want to display");

It worked for me.