如何在RecyclerView中仅在N秒内更改TextView的边框颜色

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<String> data;
    private SparseArray<Long> timerMap;

    public MyAdapter(List<String> data) {
        this.data = data;
        timerMap = new SparseArray<>();
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        String item = data.get(position);
        holder.textView.setText(item);

        // 获取当前TextView的计时器变量
        long timer = timerMap.get(position, 0L);

        // 判断当前时间与计时器变量记录的时间差是否小于N秒
        if (System.currentTimeMillis() - timer < N * 1000) {
            // 改变TextView的边框颜色
            holder.textView.setBackgroundResource(R.drawable.border_color_changed);
        } else {
            // 恢复TextView的默认边框颜色
            holder.textView.setBackgroundResource(R.drawable.border_default);
        }
    }

    @Override
    public int getItemCount() {
        return data.size();
    }

    public void startTimer(int position) {
        // 更新计时器变量为当前时间
        timerMap.put(position, System.currentTimeMillis());

        // 启动倒计时器，N秒后刷新对应的TextView
        new CountDownTimer(N * 1000, 1000) {
            @Override
            public void onTick(long millisUntilFinished) {
                // 倒计时过程中不做任何操作
            }

            @Override
            public void onFinish() {
                // 倒计时结束后，重置计时器变量
                timerMap.put(position, 0L);
                // 刷新对应的TextView
                notifyItemChanged(position);
            }
        }.start();
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        TextView textView;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.text_view);
        }
    }
}