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am 2dda21b9: Merge "Another stab at fixing issue #3149290 java.lang.RuntimeException:..." into gingerbread

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* commit '2dda21b93f8a8e0fb70de44eae826bc68349813c':
  Another stab at fixing issue #3149290 java.lang.RuntimeException:...
This commit is contained in:
Dianne Hackborn
2010-12-22 18:37:08 -08:00
committed by Android Git Automerger
parent 0dc0dab710 2dda21b93f
commit 6023873463
1 changed files with 10 additions and 2 deletions
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12
core/java/android/widget/AbsListView.java
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@@ -974,8 +974,16 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
ss.position = getSelectedItemPosition();
ss.firstId = INVALID_POSITION;
} else {
if (haveChildren) {
// Remember the position of the first child
if (haveChildren && mFirstPosition > 0) {
// Remember the position of the first child.
// We only do this if we are not currently at the top of
// the list, for two reasons:
// (1) The list may be in the process of becoming empty, in
// which case mItemCount may not be 0, but if we try to
// ask for any information about position 0 we will crash.
// (2) Being "at the top" seems like a special case, anyway,
// and the user wouldn't expect to end up somewhere else when
// they revisit the list even if its content has changed.
View v = getChildAt(0);
ss.viewTop = v.getTop();
int firstPos = mFirstPosition;