这篇文章将为大家详细讲解有关Android如何实现抢购倒计时功能，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
一、效果图
二、思路
算多少秒，秒数取余60，（满足分后剩下的秒数）
算多少分，秒数除60，再取余60 （总分数满足小时后剩下的分数）
算多少时，秒数除60，除60，再取余24 （总小时满足天后剩下的小时）
算多少天，秒数除60，除60，除24 等到的整数就是天数
三、实现步骤：
我们这里的时间格式为后台返回，格式为：
2021-12-24 00:00:001、时间转换的工具类
//将年-月-天 时：分：秒转化为毫秒格式 public static long residueTimeout(String endDate, String newDate) throws ParseException { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date d1 = df.parse(endDate); Date d2 = df.parse(newDate); long diff = d1.getTime() - d2.getTime(); return diff; } public static String stampToDate(Long s) { String res; SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date date = new Date(s); res = simpleDateFormat.format(date); return res; }2、时间倒计时工具类
package com.sjl.keeplive.huawei;import android.os.CountDownTimer;public class CountDownTimerUtils { public interface FinishDelegate { void onFinish(); } public interface TickDelegate { void onTick(long pMillisUntilFinished); } private final static long ONE_SECOND = 1000; private long mMillisInFuture = 0; private long mCountDownInterval; private FinishDelegate mFinishDelegate; private TickDelegate mTickDelegate; private MyCountDownTimer mCountDownTimer; public static CountDownTimerUtils getCountDownTimer() { return new CountDownTimerUtils(); } public CountDownTimerUtils setCountDownInterval(long pCountDownInterval) { this.mCountDownInterval = pCountDownInterval; return this; } public CountDownTimerUtils setFinishDelegate(FinishDelegate pFinishDelegate) { this.mFinishDelegate = pFinishDelegate; return this; } public CountDownTimerUtils setMillisInFuture(long pMillisInFuture) { this.mMillisInFuture = pMillisInFuture; return this; } public CountDownTimerUtils setTickDelegate(TickDelegate pTickDelegate) { this.mTickDelegate = pTickDelegate; return this; } public void create() { if (mCountDownTimer != null) { mCountDownTimer.cancel(); mCountDownTimer = null; } if (mCountDownInterval <= 0) { mCountDownInterval = mMillisInFuture + ONE_SECOND; } mCountDownTimer = new MyCountDownTimer(mMillisInFuture, mCountDownInterval); mCountDownTimer.setTickDelegate(mTickDelegate); mCountDownTimer.setFinishDelegate(mFinishDelegate); } public void start() { if (mCountDownTimer == null) { create(); } mCountDownTimer.start(); } public void cancel() { if (mCountDownTimer != null) { mCountDownTimer.cancel(); } } private static class MyCountDownTimer extends CountDownTimer { private FinishDelegate mFinishDelegate; private TickDelegate mTickDelegate; public MyCountDownTimer(long millisInFuture, long countDownInterval) { super(millisInFuture, countDownInterval); } @Override public void onTick(long millisUntilFinished) { if (mTickDelegate != null) { mTickDelegate.onTick(millisUntilFinished); } } @Override public void onFinish() { if (mFinishDelegate != null) { mFinishDelegate.onFinish(); } } void setFinishDelegate(FinishDelegate pFinishDelegate) { this.mFinishDelegate = pFinishDelegate; } void setTickDelegate(TickDelegate pTickDelegate) { this.mTickDelegate = pTickDelegate; } }}3、布局文件
<LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:orientation="horizontal"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="抢购倒计时：" /> <TextView android:id="@+id/text_day" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#ff0000" android:padding="5dp" android:text="00" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" 天 " /> <TextView android:id="@+id/text_hour" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#ff0000" android:padding="5dp" android:text="00" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" 时 " /> <TextView android:id="@+id/text_minute" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#ff0000" android:padding="5dp" android:text="00" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" 分 " /> <TextView android:id="@+id/text_second" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#ff0000" android:padding="5dp" android:text="00" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=" 秒 " /> </LinearLayout>4、倒计时显示处理
public static void liveDescCountTime(long ms, TextView tvDays, TextView tvHour, TextView tvMinutes, TextView tvSeconds) { long totalSeconds = ms / 1000; long seconds = totalSeconds % 60; long minutes = totalSeconds / 60 % 60; long hours = totalSeconds / 60 / 60 % 24; long days = totalSeconds / 60 / 60 / 24; String dayStr = ""; if (days > 0) { if (days > 9) { dayStr += days + ""; } else if (days > 0) { dayStr += "0" + days + ""; } else { dayStr += "00"; } } else { dayStr = "00"; } tvDays.setText(dayStr); String hourStr = ""; if (hours > 0) { if (hours > 9) { hourStr += hours + ""; } else if (hours > 0) { hourStr += "0" + hours + ""; } else { hourStr += "00"; } } else { hourStr = "00"; } tvHour.setText(hourStr); String minutesStr = ""; if (minutes > 0) { if (minutes > 9) { minutesStr += minutes + ""; } else if (minutes > 0) { minutesStr += "0" + minutes + ""; } else { minutesStr += "00"; } } else { minutesStr = "00"; } tvMinutes.setText(minutesStr); String secondStr = ""; if (minutes > 0) { if (seconds > 9) { secondStr += seconds; } else if (seconds > 0) { secondStr += "0" + seconds; } else { secondStr += "00"; } } else { secondStr = "00"; } tvSeconds.setText(secondStr); }5、开始倒计时
final TextView text_day = findViewById(R.id.text_day); final TextView text_hour = findViewById(R.id.text_hour); final TextView text_minute = findViewById(R.id.text_minute); final TextView text_second = findViewById(R.id.text_second); long residueTime = 0; //获取当前时间 String stampToDate = stampToDate(System.currentTimeMillis()); try { //2021-12-24 00:00:00为模拟倒计时间数据 residueTime = residueTimeout("2021-12-24 00:00:00", stampToDate); } catch (ParseException e) { e.printStackTrace(); } //倒计时 CountDownTimerUtils.getCountDownTimer() .setMillisInFuture(residueTime) .setCountDownInterval(1000) .setTickDelegate(new CountDownTimerUtils.TickDelegate() { @Override public void onTick(long pMillisUntilFinished) { liveDescCountTime(pMillisUntilFinished, text_day, text_hour, text_minute, text_second); } }) .setFinishDelegate(new CountDownTimerUtils.FinishDelegate() { @Override public void onFinish() { //倒计时完成后处理 } }).start();关于“Android如何实现抢购倒计时功能”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
