You define a layout to 'look' like a prompt, for example, grayed out. The Dropdown doesn't normally show the prompt)
(Note: Some themes show a DropDown for a Spinner instead of a dialog. This allows you to use a standard prompt or define your own 'nothing selected' as the first row, or both, or none. (So you have to use the setTag or something else to ensure your convertView is correct.) Spinner does not support multiple view types There is an Android bug that makes this a little tougher to re-use views. (Swap cursor on the wrapped cursorAdapter of course.)
Here is a working example tested for Android 2.3, and 4.0 (it uses nothing in the compatibility library, so it should be fine for awhile) Since it's a decorator, it should be easy to retrofit existing code and it works fine with CursorLoaders also.
What you can do is decorate your SpinnerAdapter with one that presents a 'Select Option.' View initially for the Spinner to display with nothing selected.
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