Changing Android Spinner Background
<p>I have an android spinner that has an arrow that points down.  When the list is open, I would like the arrow to point up.  There used to be a state_dropdown_showing.  In API 15 (4.0.3) this state seems to be removed.</p>

<p>What is the proper way to know if the list is open or not, such that the background of the spinner (including the arrow) could be changed dynamically via XML?</p>
