這是我用ListView範例改的，並參考How to expand the Status Bar in Android（http://www.xequae.com/node/4539）所以應是任意按其中的ItemA,ItemB,ItemC就會
達到我要的效果(擴展狀態列）..但..

package com.test123;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import android.app.Activity;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.view.View;  

public class test123 extends Activity implements 
OnItemClickListener{
	Method expandStatusBar;
	Object mStatusBarManager= new Object();
	Object statusBarManager = new Object();
	 public void onItemClick(AdapterView <?> arg0, 
	View arg1, int arg2, long arg3) {  
	 this.setTitle("You Click Item:" + String.valueOf(arg2));   




       mStatusBarManager=this.getSystemService("statusbar");
		Method[] methods=statusBarManager.getClass().getDeclaredMethods();
     for (Method method : methods)
     {
		if (method.getName().compareTo("expand")==0)  //這裡
         {expandStatusBar = method;} //這裡
	}
     try {
    	  expandStatusBar.invoke(statusBarManager);
    	} catch (IllegalArgumentException e) {
    	  e.printStackTrace();
    	} catch (IllegalAccessException e) {
    	  e.printStackTrace();
    	} catch (InvocationTargetException e) {
    	  e.printStackTrace();
    	}	 

}  
	 private ListView mListView = null;   
    @Override

public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mListView = new ListView(this);  
mListView.setOnItemClickListener((OnItemClickListener) this);  
(this,android.R.layout.simple_list_item_checked,  
new String[]{"ItemA", "ItemB", "ItemC"});  
mListView.setAdapter(adapter);  
this.setContentView(mListView);  
}  
};

程式碼中的if完全沒有跑進去，導致了下面的 expandStatusBar.invoke(statusBarManager);出了問題..（似乎是因為expandStatusBar=null..)

有沒有大大知道為什麼？謝謝