当时遇到的主要难点在于TextView的内容不会刷新改变值，今天终于通过Timer和Handler实现了，分享给大家

import java.util.Timer;  import java.util.TimerTask;  import android.app.Activity;  import android.os.Bundle;  import android.os.Handler;  import android.os.Message;  import android.view.View;  import android.widget.Button;  import android.widget.TextView;    public class AndroidLuckyActivity extends Activity  {          private TextView textView;          private Button button_start;          private Button button_end;          private Boolean begined = false;          private Timer timer;          private Handler handler;      /** Called when the activity is first created. */      @Override      public void onCreate(Bundle savedInstanceState)       {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);          init();          handler = new Handler()          {   public void handleMessage(Message msg)                  {                          super.handleMessage(msg);                          if(begined == true)                          {                                  textView.setText("" +msg.what);                          }                          else if(begined == false)                          {  　　　　　　　　　　　　　　　　　　　 textView.setText("" + msg.what);                                  timer.cancel();                        //Timer停止                          }                  }          };      }        void init()      {              textView = (TextView)this.findViewById(R.id.tv);              button_start = (Button)this.findViewById(R.id.btn_start);              button_end = (Button)this.findViewById(R.id.btn_end);          button_start.setOnClickListener(new Button.OnClickListener()          {                          @Override                          public void onClick(View v)                          {                                  // TODO Auto-generated method stub                                  begined = true;                                  button_start.setEnabled(false);                                  button_end.setEnabled(true);                                  timer = new Timer();                                  timer.schedule(new TimerTask()                                   {                                          @Override                                          public void run()                                          {                                                  // TODO Auto-generated method stub                                                  Message message = new Message();                                                  message.what = (int) (Math.random() * 999 + 100);                                                  handler.sendMessage(message);                                          }                                  }, 1000, 30);        //从1000ms即1s开始，30ms为数字改变周期                          }          });          button_end.setOnClickListener(new Button.OnClickListener()          {                          @Override                          public void onClick(View v)                          {                                  // TODO Auto-generated method stub                                  begined = false;                                  button_start.setEnabled(true);                                  button_end.setEnabled(false);                          }          });      }  }

运行图：