Android Timer的应用示例

 package com.hyzhou.timerdemo1;

 import java.util.Timer;
 import java.util.TimerTask;

 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.TextView;
 import android.app.Activity;

 public class MainActivity extends Activity {

      // 定义计时器
     Timer timer=new Timer();

     private TextView tv;
     private Button bt;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         //定义UI组件
         tv=(TextView)findViewById(R.id.tv);
         bt=(Button)findViewById(R.id.bt);

         Log.i("hyzhou", Thread.currentThread().getName());
         //定义Handler
          final Handler handler=new Handler(){

             @Override
             public void handleMessage(Message msg) {
                 // TODO Auto-generated method stub
                 super.handleMessage(msg);
                 //handler处理消息
                 if (msg.what>0) {
                     tv.setText(" "+msg.what);
                 }
                 else {
                     //在handler里可以更改UI组件
                     tv.setText("开始点火");
                     timer.cancel();
                 }
             }

         };
         // 定义按钮的点击监听器
         bt.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 // TODO Auto-generated method stub
                 timer.schedule(new TimerTask() {
                     int i=10;
                     // TimerTask 是个抽象类,实现的是Runable类
                     @Override
                     public void run() {
                         // TODO Auto-generated method stub
                         Log.i("hyzhou", Thread.currentThread().getName());
                         //定义一个消息传过去
                         Message message=new Message();
                         message.what=i--;
                         handler.sendMessage(message);
                     }
                 }, 1000, 2000);
             }
         });

     }

 }

参考：http://www.360doc.com/content/11/1129/15/6541311_168365884.shtml