简单的解决方案是：

Handler handler=new Handler();
handler.postDelayed(new UpdateTimerThread(holder),0); 

public Class UpdateTimerThread implements Runnable{
Holder holder;

    public UpdateTimerThread(Holder holder){
        this.holder=holder;
    }
    @Override
    public void run() {
        lgetCreatedTime = lgetCreatedTime + 1000;
        long diffSeconds;
        long diffMinutes;
        long diffHours;
        diffSeconds = lgetCreatedTime / 1000 % 60;
        diffMinutes = lgetCreatedTime / (60 * 1000) % 60;
        diffHours = lgetCreatedTime / (60 * 60 * 1000) % 24;
        holder.GameTimer.setText(String.format("%02d:%02d:%02d", diffHours,   diffMinutes, diffSeconds));
        handler.postDelayed(this,1000);
    }
}

注：1.Holder是ViewHolder类的对象

2.创建类UpdateTimerThread实现Runnable

3.将日期和时间转换为Long并存储到lgetCreatedTime中

4.每隔1秒运行一次处理程序以计时

在这里您可以查看并下载Countdown timers in a RecyclerView的源代码

Activity_main.xml

<RelativeLayout android:layout_width=”match_parent”
android:layout_height=”match_parent”
xmlns:android=”http://schemas.android.com/apk/res/android”&gt;

<android.support.v7.widget.RecyclerView
android:id=”@+id/recycler_view”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:scrollbars=”vertical” />

</RelativeLayout>

Adapter_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="15dp"
    android:padding="10dp"
    android:id="@+id/tv_timer"/>

</LinearLayout>

MainActivity.Java

package com.androidsolutionworld.multipletimer;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.LinearLayout;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private ArrayList al_data = new ArrayList<>();
private Adapter obj_adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
    al_data.add("1234");
    al_data.add("1257");
    al_data.add("100");
    al_data.add("1547");
    al_data.add("200");
    al_data.add("500");
    al_data.add("2000");
    al_data.add("1000");

    obj_adapter = new Adapter(al_data);
    LinearLayoutManager layoutManager = new LinearLayoutManager(getApplicationContext(),LinearLayoutManager.VERTICAL,false);
    recyclerView.setLayoutManager(layoutManager);
    recyclerView.setAdapter(obj_adapter);
}
}

自定义适配器：

import android.os.CountDownTimer;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;

public class Adapter extends RecyclerView.Adapter{

private ArrayList al_data;

public class MyViewHolder extends RecyclerView.ViewHolder{
    public TextView tv_timer;
    CountDownTimer timer;

    public MyViewHolder (View view){
        super(view);
        tv_timer = (TextView)view.findViewById(R.id.tv_timer);

    }

}

public Adapter(ArrayList al_data) {
    this.al_data = al_data;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_layout,parent,false);

    return new MyViewHolder(view);
}

@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {

    holder.tv_timer.setText(al_data.get(position));

    if (holder.timer != null) {
        holder.timer.cancel();
    }
     long timer = Long.parseLong(al_data.get(position));

    timer = timer*1000;

    holder.timer = new CountDownTimer(timer, 1000) {
        public void onTick(long millisUntilFinished) {
          holder.tv_timer.setText("" + millisUntilFinished/1000 + " Sec");
        }

        public void onFinish() {
            holder.tv_timer.setText("00:00:00");
        }
    }.start();

}

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

}

在这里，我扩展了AppCompatTextView并在其中添加了CountDownTimer。我正在处理onStop和onStart，所以CountDownTimer不能在后台运行。

class TimeCounterView : androidx.appcompat.widget.AppCompatTextView {
    constructor(context: Context) : super(context)
    constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)
    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(
        context,
        attrs,
        defStyleAttr
    )

var countDownTimer: CountDownTimer? = null

fun startCountDown(expireTimeStamp: Long, removeItem: () -> Unit) {
    stopCounter()
    text = calculateTimeExpire(expireTimeStamp)//custom method to calculate time until expireTime
    countDownTimer = object : CountDownTimer(
        expireTimeStamp * 1000 - System.currentTimeMillis(),
        ONE_MINUTE_MILLIS / 16
    ) {
        override fun onTick(millisUntilFinished: Long) {
            text = calculateTimeExpire(expireTimeStamp)
        }

        override fun onFinish() {
            text = context.getString(R.string.choice_finished)
            removeItem()
        }
    }
    countDownTimer?.start()
}

fun stopCounter() {
    countDownTimer?.cancel()
}

companion object {
    const val ONE_MINUTE_MILLIS: Long = 60000
}
}

然后将其用作项目视图XML中的普通视图，如下所示

....
    <com.example.custom.TimeCounterView
        android:id="@+id/timeTV"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="12dp"
        android:layout_weight="0"
        android:textColor="@color/colorText"
        tools:text="23:59" />
....

然后在适配器内部，您将需要实现非常重要的方法onViewRecycled，该方法将被调用以从Timer对象中释放内存。

override fun onViewRecycled(holder: ChannelChoiceViewHolder) {
        super.onViewRecycled(holder)
        holder.stopCounter()
    }

然后在夹子里，你会这样做

fun bind(item: ChannelPageChoice, position: Int) {
    //...
    binding.timeTV.startCountDown(item.expire){ removeItem(position) }
    //...
}
fun stopCounter() {
    binding.timeTV.stopCounter()
}

然后在活动/片段中，您必须在onStop中将Receierview设置为空，并在onStart中再次将其重新附加，这样做将在您的所有视图上调用onViewRecycled，如果屏幕上看不到回收器，则计时器将停止。

override fun onStop() {
    super.onStop()
    currentItemPosition =
        (binding.recyclerView.layoutManager as? LinearLayoutManager)
            ?.findFirstVisibleItemPosition() ?: 0

    binding.recyclerView.adapter = null
}

override fun onStart() {
    super.onStart()
    binding.recyclerView.adapter = myCustomAdapter
    binding.recyclerView.scrollToPosition(currentItemPosition)
}

在ViewHolder中添加CountDownTimer成员。在onBindViewHolder()中设置并启动计数器，不要忘记取消ViewHolder相同示例中的任何现有计数器。在onTick()中，您需要更新显示屏上的值，而不是启动计数器。

可以在ViewHolder类中创建CountDownTimer引用，并在Adapter的onBindViewHolder方法中创建其示例。

它工作得很完美。

考验我自己。

在onbindvieWHOLDER：

if (holder.countDownTimer != null) {
                holder.countDownTimer.cancel();
            }

            holder.countDownTimer = new CountDownTimer(time * 1000, 
                1000) {
                public void onTick(long millisUntilFinished) {
                    long seconds = millisUntilFinished / 1000;
                    long minutes = seconds / 60;
                    long hours = minutes / 60;
                    long days = hours / 24;
                    String something = days+" "+"days" +" :" +hours % 24 
                    + ":" + minutes % 60 + ":" + seconds % 60;
                    holder.tv_TimeRemained.setText(something);
                }

                public void onFinish() {
                    holder.tv_TimeRemained.setText("Time up!");
                }
            }.start();

仍然是滞后的