Android时间倒计时

有个CountDownTimer类，重写这个类可以实现自己的时间倒计时，我实现的代码如下：

public class MyCount extends CountDownTimer{ //构造函数，都是毫秒为单位 public MyCount(long millisInFuture, long countDownInterval) { super(millisInFuture, countDownInterval); // TODO Auto-generated constructor stub } @Override public void onFinish() { // TODO Auto-generated method stub //倒计完成 } @Override public void onTick(long millisUntilFinished) { // TODO Auto-generated method stub mTimeLabel.setText("Left: " + millisUntilFinished / 1000); } }

开始和取消调用其已有的方法start和cancel。

这里有别人写的一个类，很不错

import android.os.Handler; import android.os.Message; public abstract class AdvancedCountdownTimer { private final long mCountdownInterval; private long mTotalTime; private long mRemainTime; public AdvancedCountdownTimer(long millisInFuture, long countDownInterval) { mTotalTime = millisInFuture; mCountdownInterval = countDownInterval; mRemainTime = millisInFuture; } public final void seek(int value) { synchronized (AdvancedCountdownTimer.this) { mRemainTime = ((100 - value) * mTotalTime) / 100; } } public final void cancel() { mHandler.removeMessages(MSG_RUN); mHandler.removeMessages(MSG_PAUSE); } public final void resume() { mHandler.removeMessages(MSG_PAUSE); mHandler.sendMessageAtFrontOfQueue(mHandler.obtainMessage(MSG_RUN)); } public final void pause() { mHandler.removeMessages(MSG_RUN); mHandler.sendMessageAtFrontOfQueue(mHandler.obtainMessage(MSG_PAUSE)); } public synchronized final AdvancedCountdownTimer start() { if (mRemainTime <= 0) { onFinish(); return this; } mHandler.sendMessageDelayed(mHandler.obtainMessage(MSG_RUN), mCountdownInterval); return this; } public abstract void onTick(long millisUntilFinished, int percent); public abstract void onFinish(); private static final int MSG_RUN = 1; private static final int MSG_PAUSE = 2; private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { synchronized (AdvancedCountdownTimer.this) { if (msg.what == MSG_RUN) { mRemainTime = mRemainTime - mCountdownInterval; if (mRemainTime <= 0) { onFinish(); } else if (mRemainTime < mCountdownInterval) { sendMessageDelayed(obtainMessage(MSG_RUN), mRemainTime); } else { onTick(mRemainTime, new Long(100 * (mTotalTime - mRemainTime) / mTotalTime) .intValue()); sendMessageDelayed(obtainMessage(MSG_RUN), mCountdownInterval); } } else if (msg.what == MSG_PAUSE) { } } } }; }

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