安卓“倒计时”的代码

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private long mHour = 02;private long mMin = 15;private long mSecond = 36;private boolean isRun = true;String hourStr;String minuteStr;String secondStr;

  /**     * 开启倒计时     */    private void startRun() {        new Thread(new Runnable() {            @Override            public void run() {                // TODO Auto-generated method stub                while (isRun) {                    try {                        Thread.sleep(1000); // sleep 1000ms                        Message message = Message.obtain();                        message.what = 1;                        timeHandler.sendMessage(message);                    } catch (Exception e) {                        e.printStackTrace();                    }                }            }        }).start();    }    /**     * 倒计时计算     */    private void computeTime() {        mSecond--;        if (mSecond < 0) {            mMin--;            mSecond = 59;            if (mMin < 0) {                mMin = 59;                mHour--;            }        }    }

发送消息给Handler:

  private Handler timeHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            if (msg.what==1) {                computeTime();                if (mHour<10){                   hourStr="0"+mHour+"";                }else {                   hourStr="0"+mHour+"";                }                if (mMin<10){                 minuteStr=mMin+"";                }else {                   minuteStr=mMin+"";                }                if (mSecond<10){                   secondStr="0"+mSecond+"";                }else {                    secondStr=mSecond+"";                }            }            tv.setText("倒计时："+hourStr+"小时"+minuteStr+"分钟"+secondStr+"秒");        }    };

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