Android Thread Runable Handler Looper

在android 開發文件 到處都有情況之下，
想不到今天讓我遇到一個難解的問題，
趕快分享給各位：

package com.example.testui;

import java.io.IOException;
import java.net.MalformedURLException;

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

public class MainActivity extends Activity {
 Handler handler;
 Runnable r = new Runnable(){  
    
   @Override  
   public void run() {  
    Message msg = handler.obtainMessage(); 
    Bundle b = new Bundle(); 
    // for some reason you have put another thread to get data from net
    // your code here than get data 位置有差喔!!!
    //facebook 在某些 android 版本會NetworkOnMainThreadException error 解法是 在另一個Thread上跑 為了解這個問題 所以用了 這個架構，結果找到更多問題!
fb.request("https://graph.facebook.com/me");b.putString("me", "yaya"); 
msg.setData(b); 
    handler.sendMessage(msg); 
   }  
 };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
    Button b = (Button)findViewById(R.id.button1);
        b.setOnClickListener(new OnClickListener(){ 

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    new Thread(r ).start(); //因為onclick..是子線程，android有限制這裡 new thread 不能在更動 UI !
   }
         
        });
  
        Looper looper = Looper.getMainLooper(); //一定得取得 main looper  
        handler = new Handler(looper){ 
          public void handleMessage(Message msg) 
          { 
               //String me = msg.getData().getString("me");
         
               TextView t = (TextView)findViewById(R.id.text);
               
               t.setText(msg.getData().get("me").toString());
              
       
          }
     };
    }
}