左上角的那个单元格，每次notifyDataSetChanged()都会添加新View到FrameLayout，且旧View没有移除

[zhuanglee]

左上角的那个单元格是TextView，更改其文本内容时，会和前一次的值叠加在一起显示

[zhuanglee]

下面是ScrollablePanel的部分代码：
private void setUpFirstItemView(PanelAdapter panelAdapter) {
RecyclerView.ViewHolder viewHolder = panelAdapter.onCreateViewHolder(firstItemView, panelAdapter.getItemViewType(0, 0));
panelAdapter.onBindViewHolder(viewHolder, 0, 0);
firstItemView.addView(viewHolder.itemView);
}

[zhuanglee]

继承ScrollablePanel重写notifyDataSetChanged方法解决了
@OverRide
public void notifyDataSetChanged() {
firstItemView.removeAllViews();
super.notifyDataSetChanged();
}