public override bool AnimateAppearance(RecyclerView.ViewHolder viewHolder, ItemHolderInfo preLayoutInfo, ItemHolderInfo postLayoutInfo)
{
EnsureDiffResultIsSet();
var view = viewHolder.ItemView;
var set = new AnimatorSet();
var scaleAnimator = ObjectAnimator.OfFloat(view, "scaleY", 1f);
var translateAnimator = ObjectAnimator.OfFloat(view, "translationY", 0);
view.TranslationY = -view.Height * _addedIndexes.FindIndex(0, x => x == ((IndexedItemHolderInfo)postLayoutInfo).Index);
view.ScaleY = 0f;
view.PivotY = 0;
set.PlayTogether(scaleAnimator, translateAnimator);
set.AddListener(new AnimatorListener(onEndAction: _ => DispatchAnimationFinished(viewHolder)));
_pendingAnimators.Add(set);
return(true);
}
public override bool AnimateDisappearance(RecyclerView.ViewHolder viewHolder, ItemHolderInfo preLayoutInfo, ItemHolderInfo postLayoutInfo)
{
EnsureDiffResultIsSet();
var view = viewHolder.ItemView;
var translationY = -view.Height * _removedIndexes.FindIndex(0, x => x == ((IndexedItemHolderInfo)preLayoutInfo).Index);
var set = new AnimatorSet();
var scaleAnimator = ObjectAnimator.OfFloat(view, "scaleY", 0f);
var translateAnimator = ObjectAnimator.OfFloat(view, "translationY", translationY);
view.PivotY = 0;
set.PlayTogether(scaleAnimator, translateAnimator);
_pendingAnimators.Add(set);
return(true);
}
