RecycleView 倒计时 中因为复用机制导致的倒计时时间混乱的处理方案（转载自掘金）

使用背景：在电商项目中的很多item的倒计时显示。

产生问题的原因：1、复用  2、代码多次调用

解决方案：使用Timer + View集合  （使用集合将View保存起来）

private Timer mTimer;
private Set<RecyclerViewViewHolder> mHolders;

public RecyclerViewAdapter(Activity activity, List<Long> itemList) {
    if (activity == null || itemList == null) {
        throw new IllegalArgumentException("params can't be null");
    }
    this.activity = activity;
    this.itemList = itemList;
    mHolders = new HashSet<>();
    mTimer = new Timer();
    mTimer.scheduleAtFixedRate(new TimerTask() {
        @Override
        public void run() {
            for (RecyclerViewViewHolder holder : mHolders) {
                updateTime(holder, holder.getTime());
            }
        }
    }, 0, 1000);
}

@Override
public void onBindViewHolder(RecyclerViewViewHolder holder, int position) {
    holder.setTime(itemList.get(position));
    mHolders.add(holder);
    holder.mTvNum.setText(String.valueOf(position + 1));
    updateTime(holder, itemList.get(position));
}

全部代码链接： https://github.com/nesger/RecyclerView/tree/feature/refresh_3

来源：https://blog.csdn.net/sinat_34153600/article/details/102722908