Android Studio - Spinner using only Java, no XML!

Spinner implementation using Java. You could become better at Android Studio with these recommended books :- (Program code and links below) Learning Java by Building Android Games - https://amzn.to/2Bs3W5u Java - A Beginner’s Guide - https://amzn.to/2A2yDyg Beginning Android Programming with Android Studio - https://amzn.to/2SW7F2h Android App Development for Dummies - https://amzn.to/2BpYksk Code:- Spinner sp = (Spinner)findViewById(R.id.sp); ArrayList[angle open]String[angle close] al = new ArrayList[angle open]String[angle close](); al.add("English"); al.add("Physics"); al.add("Chemistry"); ArrayAdapter[angle open]String[angle close] aa = new ArrayAdapter [angle open]String[angle close](this,android.R.layout.simple_spinner_dropdown_item,al); sp.setAdapter(aa);