public override IParcelable OnSaveInstanceState()
{
var superState = base.OnSaveInstanceState() ?? new Bundle();
if (pendingAnchorSavedState != null)
{
return(new AnchorSavedState(pendingAnchorSavedState, superState));
}
var saveState = new AnchorSavedState(superState);
if (ChildCount > 0)
{
var refAnchor = getChildClosestToStart();
saveState.AnchorShouldLayoutFromEnd = false;
saveState.TopAnchorPosition = GetPosition(refAnchor);
saveState.AnchorOffset = orientationHelper.GetDecoratedStart(refAnchor) - orientationHelper.StartAfterPadding;
}
else
{
saveState.InvalidateAnchor();
}
return(saveState);
}
public override void OnRestoreInstanceState(IParcelable state)
{
base.OnRestoreInstanceState(state);
if (!(state is AnchorSavedState savedState))
{
base.OnRestoreInstanceState(state);
return;
}
base.OnRestoreInstanceState(savedState.SuperState);
pendingAnchorSavedState = savedState;
RequestLayout();
}
public AnchorSavedState(AnchorSavedState other, IParcelable supersTate) : base(supersTate)
{
TopAnchorPosition = other.TopAnchorPosition;
AnchorOffset = other.AnchorOffset;
AnchorShouldLayoutFromEnd = other.AnchorShouldLayoutFromEnd;
}
