Android listView: scrollBy and touch event

Question

I have ListView. I call scrollBy(0, 100) method in a constructor. When user want to scroll this list by touch event list returns to previous (without scroll) position and after that scrolls normaly. How can I fix this problem?

AbsListView has a method scrollListBy(pixels_y) , maybe it works better for setting default scroll position. Edit: whoops, didn't notice it's API 19 method... — harism, May 23 '14 at 17:26
Yes, probably I used setSelectionFromTop. I will check this on Monday and accept your answer then — pstrag, Aug 15 '14 at 12:21
I have the same problem. I've created a complex ExpandableListView including other ExpandableLists as some of its child elements and scrollListBy or smoothScrollFromTop doesn't work well. The only operation that moves to the correct position that I want is scrollBy (I don't now why), but I've the problem that when user touches the list, it returns to the pre-scroll state. Do you know how I can prevent this using scrollBy? Not the other operations? — drublik, Mar 25 '15 at 11:42

score 1 · Accepted Answer · edited May 23 '17 at 10:24

If you want to restore ListView state when recreating fragment (or Activity) it is better to use ListViews's onSaveInstanceState()

// Save ListView state
Parcelable state = listView.onSaveInstanceState();

// Set new items
listView.setAdapter(adapter);

// Restore previous state (including selected item index and scroll position)
listView.onRestoreInstanceState(state);

If you want just to scroll ListView programmatically use method setSelectionFromTop(int position, int y). See the answers to this question Maintain/Save/Restore scroll position when returning to a ListView

Android listView: scrollBy and touch event

1 Answers1