android - recyclerView 长按处于激活状态,背景色设置失败。

item.xml

Main.xml

        .....
        
        .....

adapter

public class TODOListAdapter extends RecyclerView.Adapter {
    public class TODOHolder extends RecyclerView.ViewHolder{
        public TODOHolder(final View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
                        itemView.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    onLongClickViewHolderListener.onLongClick();
                    itemview.setActived(true);
                }
            });
          }

在 MainActvity实现方法

@Override
    public void onLongClick(View v) {
        startActionMode(new LongOnClickCallBack());
    }

drawable/xml

itemview.setActived(true)只有边缘可以显示,请问我哪里做错了吗？应该如何设置使得全部处于激活状态.