android: AbsListView.OnScrollListener SCROLL_STATE_IDLE is not called after SCROLL_STATE_TOUCH_SCROLL (Version 2.1)

Question

I have a problem with android version 2.1. It looks like a bug.

I attached an OnScrollListener to my listView.

I'm using the method onScrollStateChanged(AbsListView view, int scrollState) for monitoring the scroll's state of my listview.

The scrollstate could assume 3 value (taken from the documentation):

1. SCROLL_STATE_FLING: The user had previously been scrolling using touch and had performed a fling. The animation is now coasting to a stop
2. SCROLL_STATE_IDLE:The view is not scrolling. Note navigating the list using the trackball counts as being in the idle state since these transitions are not animated.
3. SCROLL_STATE_TOUCH_SCROLL:The user is scrolling using touch, and their finger is still on the screen

I assume that the SCROLL_STATE_IDLE will always be passed after one of other two states. It's always true excepted for android version 2.1. SCROLL_STATE_IDLE is not passed after SCROLL_STATE_TOUCH_SCROLL The problem happens also if you stop the fling by a touch instead of let the scroll stop by itself. This strange behaviour leaves my listView in an unconsistate state.

Someonelse has the same problem? Suggestion for a "not-so-dirty" work around?

Answer 1

I think there is a bug that has been registered for this case.

http://code.google.com/p/android/issues/detail?id=5086

Answer 2

I got a similar issue on 2.2.

If the list is big enough, and I scroll down up, I got first CROLL_STATE_TOUCH_SCROLL while my finger is on the screen. When my finger leave the screen I got the SCROLL_STATE_FLING. When my view has stopped moving I got the SCROLL_STATE_IDLE.

But, if during scroll, it reaches either View Top or Bottom, I only scroll/fling values and never the idle.

I checked out Shelves project from Romain Guy and his implementation suffer the same issue on 2.2.x I'm wondering if he had noticed yet.

I haven't tried yet with 2.3.x