Difference between onItemClickListener and OnItemSelectedListener of AdapterView

Question

What is the difference between these two listeners,documentation says :

OnItemSelectedListener - Interface definition for a callback to be invoked when an item in this v

Answer 1

AdapterView.OnItemSelectedListener is invoked only when the newly selected position is different from the previously selected position or if there was no selected item.

However AdapterView.OnClickListener is invoked even you click the same item everytime.

http://developer.android.com/reference/android/widget/AdapterView.OnItemSelectedListener.html