android中发送验证码，才开始学的

MyCoun myCoun = new MyCoun(60000, 1000);

/**
 * 倒计时定时器
 * 
 * @author 1
 * 
 */
 public class MyCoun extends CountDownTimer {
    public MyCoun(long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
    }

    @Override
    public void onFinish() {
        fasong.setBackgroundResource(R.drawable.u26);
        fasong.setTextColor(Color.parseColor("#000000"));
        fasong.setText(R.string.huoquduanxin);
        fasong.setEnabled(true);
    }

    @Override
    public void onTick(long millisUntilFinished) {
        fasong.setText(("获取动态码(" + millisUntilFinished / 1000) + ")");
    }
}

在按钮的点击事件中

fasong.setEnabled(false);
 myCoun.start();