倒计时

<span style="font-size:18px;">    /**     * 倒计时     */    private class TimeCount extends CountDownTimer {        public TimeCount(long millisInFuture, long countDownInterval) {            super(millisInFuture, countDownInterval);        }        @Override        public void onFinish() {            btn_getcode.setText("重新获取");            btn_getcode.setClickable(true);        }        @Override        public void onTick(long millisUntilFinished) {            btn_getcode.setClickable(false);            btn_getcode.setText(millisUntilFinished / 1000 + "秒");        }    }</span>