<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"

     android:orientation="vertical" >

     <TextView

         android:id="@+id/textView1"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="TextView" />

 </LinearLayout>

 package com.best.daojishi;

 import android.app.Activity;

 import android.os.Bundle;

 import android.widget.TextView;

 public class MainActivity extends Activity {

     CountdownUtil c;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         TextView textView = (TextView) findViewById(R.id.textView1);

         c = new CountdownUtil(60000000, textView);

         c.countdown();

     }

     @Override

     protected void onDestroy() {

         // TODO Auto-generated method stub

         super.onDestroy();

         c.stopThread();

     }

 }

 package com.best.daojishi;

 import java.text.SimpleDateFormat;

 import java.util.TimeZone;

 import android.os.CountDownTimer;

 import android.widget.TextView;

 /**

  * 倒计时

  * */

 public class CountdownUtil {

     private long time;

     TextView counetdownView;

     CountdownThread thread;

     SimpleDateFormat formatter;

     String hms;

     /**

      * @time:时间差(指定的一段时间长),时间戳

      * @counetdownView：TextView显示倒计时

      * */

     public CountdownUtil(long time, TextView counetdownView) {

         this.time = time;

         this.counetdownView = counetdownView;

     }

     /**

      * 倒计时

      * */

     public void countdown(){

         formatter = new SimpleDateFormat("HH:mm:ss");// 初始化Formatter的转换格式。

         formatter.setTimeZone(TimeZone.getTimeZone("GMT +8:00"));//设置时区(北京),如果你不设置这个,你会发现你的时间总会多出来8个小时

         thread = new CountdownThread(time, 1000);// 构造CountDownTimer对象

         thread.start();

     }

     class CountdownThread extends CountDownTimer {

         public CountdownThread(long millisInFuture, long countDownInterval) {

             super(millisInFuture, countDownInterval);

             // TODO Auto-generated constructor stub

         }

         @Override

         public void onTick(long millisUntilFinished) {

             hms = formatter.format(millisUntilFinished);//转化成  "00:00:00"的格式

             counetdownView.setText(hms);

         }

         @Override

         public void onFinish() {

             // TODO Auto-generated method stub

             //倒计时结束时触发

             counetdownView.setText("00:00:00");

         }

     }

     /**

      * 终止线程

      * */

     public void stopThread(){

         thread.cancel();

     }

 }