Android使用CountDownTimer倒计时

1、布局文件

 <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>

2、调用

 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();
     }
 }

3、倒计时

 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();
     }
 }