實現android項目標題每隔5秒改變一次

package com.example.titleclockproject;import java.util.Timer;import java.util.TimerTask;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.Menu;import android.view.MenuItem;import android.support.v4.app.NavUtils;public class MainActivity extends Activity {private int count=1;private Handler handler=new Handler(){public void handleMessage(android.os.Message msg) {switch (msg.what) {case 1:updateTitle();break;default:break;}};};    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //第一種方法(1秒之後開始，間隔5秒)        Timer timer=new Timer();        timer.scheduleAtFixedRate(new TimerTask() {@Overridepublic void run() {Message message=new Message();message.what=1;handler.sendMessage(message);}}, 1000,5000);        //第二種方法        //TitleChange titleChange=new TitleChange();        //Thread thread=new Thread(titleChange);        //thread.start();    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.activity_main, menu);        return true;    }//    class TitleChange implements Runnable{////@Override//public void run() {//while(true){//Message message=new Message();//message.what=1;//handler.sendMessage(message);//try {//Thread.sleep(5000);//} catch (InterruptedException e) {//e.printStackTrace();//}//}////}//    //    }    private void updateTitle(){    this.setTitle("welcome to project"+count++);    }    }