title: Android list with 'grayed out' items
body: <p>In Android, I want to present the user with a list.  When an item on the list is selected some action is performed, and this list item is no longer selectable.  It is also 'grayed out' or the like to indicate that it cannot be selected the next time the list is displayed.  I have seen the isSelectable() override in Adapter, but I believe this causes the item to be treated as a separator,  which causes visual problems.  And I have not found a way to 'gray out' an item.  Any ideas?  Thanks...</p>