android　listView 删除动画 当前Item 删了，但是为什么动画总是从最后一行执行 ？

点击ListView 的item中的控件，删除当前item时，想让它一动画的方式 消失，但是，点击删除时，item可以删除掉，但是动画总是执行的最后一行 求解、？？

这是主要代码

@Override
 public View getView(final int position, View convertView, ViewGroup parent) {
 if (convertView == null) {
 convertView = LayoutInflater.from(mActivity).inflate(R.layout.layout_dialog_item_detial, null);
 holder = new ViewHolder();
 holder.tv_time = (TextView) convertView.findViewById(R.id.tv_time);
 holder.tv_score = (TextView) convertView.findViewById(R.id.tv_score);
 holder.iv_delete = (ImageView) convertView.findViewById(R.id.iv_delete);
 convertView.setTag(holder);
 } else {
 holder = (ViewHolder) convertView.getTag();
 }
    DiagHistory dh = historyLists.get(position);
    holder.tv_time.setText(dh.getScanTime());
    holder.tv_score.setText(dh.getDiaScore());
    holder.iv_delete.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            View itemView = (View) holder.iv_delete.getParent();
            removeListItem(itemView, position);
            SQLLiteService.getInstance(mActivity).deleteDialogHistory(holder.tv_time.getText().toString().trim());
        }
    });

    return convertView;
}

class ViewHolder {
    TextView tv_time, tv_score;
    ImageView iv_delete;
}

private void removeListItem(View rowView, final int positon) {
    final Animation animation = (Animation) AnimationUtils.loadAnimation(rowView.getContext(),
            R.anim.remove_dialog_list_item);
    animation.setAnimationListener(new AnimationListener() {
        public void onAnimationStart(Animation animation) {
        }

        public void onAnimationRepeat(Animation animation) {
        }

        public void onAnimationEnd(Animation animation) {
            historyLists.remove(positon);
            DialogItemDetailAdapter.this.notifyDataSetChanged();
            animation.cancel();
        }
    });
    rowView.startAnimation(animation);
}