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：