菜鸟求助

package add.android;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;import com.mas.R;public class popupTest extends Activity {
    
    ImageButton btnPopupWindow;  
    public PopupWindow pop;
    ListView listView,listView1;
    LayoutInflater inflater;
    SimpleAdapter adapter;
    EditText et;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);     
        et = (EditText)findViewById(R.id.et);
        btnPopupWindow = (ImageButton)findViewById(R.id.imgbutton1);
        btnPopupWindow.setOnClickListener(new ClickEvent());  
    }
    //统一处理按键事件          
 public class ClickEvent implements OnClickListener{   
        @Override  
        public void onClick(View v){   
            // TODO Auto-generated method stub   
           doSth(v);
        }   
        public void doSth(View v){
             if(v==btnPopupWindow)   
             {      
                 LayoutInflater inflater = (LayoutInflater)      
                            popupTest.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                 listView = (ListView) inflater.inflate(R.layout.listview, null);
                 if(pop == null){
                     adapter = new SimpleAdapter(popupTest.this, getData(), R.layout.item,  
                             new String[]{"img","info"}, new int[]{R.id.img,R.id.info});
                     listView.setFocusable(true);
                     listView.setItemsCanFocus(true);                  
                     listView.setAdapter(adapter);
                     listView.setOnItemClickListener(new OnItemClickListener(){
                         @Override
                         public void onItemClick(AdapterView<?> arg0, View arg1,
                                 int arg2, long arg3) {
                             // TODO Auto-generated method stub
                             if(arg2==0){
                                 Intent mIntent = new Intent();
                                 mIntent.setClass(popupTest.this, tt.class);
                                 startActivity(mIntent);
                             }
                             else if(arg2==1)
                             {
                                 finish();
                             }
                             pop.dismiss();
                             pop = null;
                         }
                     });        
                     pop = new PopupWindow(listView,150,LayoutParams.WRAP_CONTENT);
                     pop.setBackgroundDrawable(getResources().getDrawable(R.layout.rounded_corners_pop));
                     pop.setTouchable(true);
                     pop.setFocusable(true);
                     pop.showAsDropDown(btnPopupWindow,1,15);             
                 }else{
                     pop.dismiss();
                     pop = null;
                 } 
             }
        }
       public List<Map<String, Object>> getData() {  
            List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  
            Map<String, Object> map = new HashMap<String, Object>(); 
            map.put("img", R.drawable.header);
            map.put("info", "切换用户");                 
            list.add(map);  
            map = new HashMap<String, Object>();  
            map.put("img", R.drawable.delete);
            map.put("info", "退出程序");                 
            list.add(map);  
            return list;     
        }  
    }
}
这段程序怎么在xml中写啊？哪位大哥大姐帮忙写一下。谢谢了