public class CountdownTimerActivity extends Activity {

private TimeCount time;

private Button checking;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

time = new TimeCount(60000, 1000);//构造CountDownTimer对象

checking = (Button) findViewById(R.id.button1);

checking.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

time.start();//开始计时

}

});

}

/* 定义一个倒计时的内部类 */

class TimeCount extends CountDownTimer {

public TimeCount(long millisInFuture, long countDownInterval) {

super(millisInFuture, countDownInterval);//参数依次为总时长,和计时的时间间隔

}

@Override

public void onFinish() {//计时完毕时触发

checking.setText("重新验证");

checking.setClickable(true);

}

@Override

public void onTick(long millisUntilFinished){//计时过程显示

checking.setClickable(false);

checking.setText(millisUntilFinished /1000+"秒");

}

}