/*验证码倒计时*/
private class TimeCount extends CountDownTimer{
  /**
   * @param millisInFuture  总时间长度（毫秒）
   * @param countDownInterval 时间间隔（毫秒），每经过一次时间间隔都会调用onTick方法
   */
  public TimeCount(long millisInFuture, long countDownInterval) {
    super(millisInFuture, countDownInterval);
  }
  @Override
  public void onTick(long millisUntilFinished) {   //倒计时状态
    getVerificationCodeBtn.setClickable(false);     //设置button此时不可点击
    getVerificationCodeBtn.setBackground(getResources().getDrawable(R.drawable.get_verification_code_waitting_bg));//修改button的背景
    getVerificationCodeBtn.setTextColor(getResources().getColor(R.color.black));//修改button的textColor
    getVerificationCodeBtn.setText(millisUntilFinished / 1000 +"s后可重新发送");//显示button的倒计时文字
  }
  @Override
  public void onFinish() {      //倒计时结束状态
    getVerificationCodeBtn.setBackground(getResources().getDrawable(R.drawable.login_btn_bg));
    getVerificationCodeBtn.setTextColor(getResources().getColor(R.color.white));
    getVerificationCodeBtn.setClickable(true);   //重新设置button为可点击
    getVerificationCodeBtn.setText("重新获取");   //修改button的文字
  }
}

　　TimeCount timeCount = new TimeCount(60000,1000);
　　timeCount.start();