It seems to me I need to assume getFirstVisiblePosition() can get out
of sync with the data set, and in order to update my data manually
(without calling ArrayAdapter.notifyDataSetChanged) is that I need to
iterate over the data set items, not the indexes defined by
getFirstVisiblePosition() and
I figured it out. The long/short of it is that notifyDataSetChanged()
does NOT cause ListView.getFirstVisiblePosition() to get updated
immediately -- it gets updated on NEXT redraw of the ListView. I had
some code that was causing my display method to be called twice in the
same event loop. In
Good find!
About the multiple calls to notifyDataSetChanged() in the same 'event loop'
cycle:
I don't think it will cause multiple redraws, much like multiple calls to a
view's 'invalidate()' method in the same event-loop cycle that won't cause
multiple redraws either.
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