AdapterView?onItemClickListener?OnItemSelectedListener?

Question

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OnItemSelectedListener - ???????????????????????????????????????????

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OnItemClickListener - ??AdapterView?????????????????????

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Answer 1

OnItemSelectedListener is used for Spinners, and OnItemClickListener is used for ListViews.

Answer 2

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