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CountDownTimer 倒计时，定时器工具类

web 2025/7/3 14:20:05

CountDownTimer 倒计时，定时器工具类可以用于各种倒计时控件，或者超时机制，使用十分方便。

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);}@Overridepublic void onTick(long millisUntilFinished) {if (mTickDelegate != null) {mTickDelegate.onTick(millisUntilFinished);}}@Overridepublic void onFinish() {if (mFinishDelegate != null) {mFinishDelegate.onFinish();}}void setFinishDelegate(FinishDelegate pFinishDelegate) {this.mFinishDelegate=pFinishDelegate;}void setTickDelegate(TickDelegate pTickDelegate) {this.mTickDelegate=pTickDelegate;}}
}

使用方式

    //定时器，时间单位毫秒CountDownTimerUtils.getCountDownTimer().setMillisInFuture(60 * 1000)//总时长.setCountDownInterval(1000)//定期回调时间.setTickDelegate(new CountDownTimerUtils.TickDelegate() {@Overridepublic void onTick(long pMillisUntilFinished) {Log.i("剩余 "+(pMillisUntilFinished / 1000)+"s");}}).setFinishDelegate(new CountDownTimerUtils.FinishDelegate() {@Overridepublic void onFinish() {//倒计时结束，也就是相当于定时器，用于延后处理的机制，如超时，延时关闭等等Log.i("倒计时结束");}}).start();