how to add item to Spinner's ArrayAdapter?

Question

i had a EditText , a button and a spinner . When click the button , the spinner will add a new item with name you entered in the EditText. But here is the question, my adap

Answer 1

Javi is right except don't reference an array for the second parameter.

adapter = new ArrayAdapter(this,
  android.R.layout.simple_spinner_item,
  someList);