Android实现抢购倒计时功能-技术圈

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 00:00:00

1、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;    }
    /*     * 将毫秒转换成时间戳     */    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;
/** * 倒计时工具类 */public class CountDownTimerUtils {    /**     * 倒计时结束的回调接口     */    public interface FinishDelegate {        void onFinish();    }
    /**     * 定期回调的接口     */    public interface TickDelegate {        void onTick(long pMillisUntilFinished);    }
    private final static long ONE_SECOND = 1000;    /**     * 总倒计时时间     */    private long mMillisInFuture = 0;    /**     * 定期回调的时间 必须大于0 否则会出现ANR     */    private long mCountDownInterval;    /**     * 倒计时结束的回调     */    private FinishDelegate mFinishDelegate;    /**     * 定期回调     */    private TickDelegate mTickDelegate;    private MyCountDownTimer mCountDownTimer;
    /**     * 获取 CountDownTimerUtils     *     * @return CountDownTimerUtils     */    public static CountDownTimerUtils getCountDownTimer() {        return new CountDownTimerUtils();    }
    /**     * 设置定期回调的时间 调用{@link #setTickDelegate(TickDelegate)}     *     * @param pCountDownInterval 定期回调的时间 必须大于0     * @return CountDownTimerUtils     */    public CountDownTimerUtils setCountDownInterval(long pCountDownInterval) {        this.mCountDownInterval = pCountDownInterval;        return this;    }
    /**     * 设置倒计时结束的回调     *     * @param pFinishDelegate 倒计时结束的回调接口     * @return CountDownTimerUtils     */    public CountDownTimerUtils setFinishDelegate(FinishDelegate pFinishDelegate) {        this.mFinishDelegate = pFinishDelegate;        return this;    }
    /**     * 设置总倒计时时间     *     * @param pMillisInFuture 总倒计时时间     * @return CountDownTimerUtils     */    public CountDownTimerUtils setMillisInFuture(long pMillisInFuture) {        this.mMillisInFuture = pMillisInFuture;        return this;    }
    /**     * 设置定期回调     *     * @param pTickDelegate 定期回调接口     * @return CountDownTimerUtils     */    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);    }
    /**     * 开始倒计时     */    public void start() {        if (mCountDownTimer == null) {            create();        }        mCountDownTimer.start();    }
    /**     * 取消倒计时     */    public void cancel() {        if (mCountDownTimer != null) {            mCountDownTimer.cancel();        }    }
    private static class MyCountDownTimer extends CountDownTimer {        private FinishDelegate mFinishDelegate;        private TickDelegate mTickDelegate;
        /**         * @param millisInFuture    The number of millis in the future from the call         *                          to {@link #start()} until the countdown is done and {@link #onFinish()}         *                          is called.         * @param countDownInterval The interval along the way to receive         *                          {@link #onTick(long)} callbacks.         */        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();

代码都已经放在上面啦

到这里就结束啦