自定义列表:上半部分不可点击

我用onItemClickListener制作了一个自定义列表，只有下半部分是可点击的。该列表使用扩展ArrayAdapter的ImageAdapter。每行有两个ImageView和一个TextView，它们使用以下xml参数

android:focusable="false" 
android:focusableInTouchMode="false"
android:clickable="false"

我遵循了本教程，甚至尝试删除TextView和ImageView。删除它们后，列表根本无法点击。

这是我的主要活动

public class ClickTestActivity extends ListActivity  
{ 
String[] listItems={"alpha", "beta", "gamma", "delta", "epsilon"};  
boolean[] listImages={true, false, true, false, true}; 
@Override
public void onCreate(Bundle savedInstanceState)  
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    setListAdapter(new ImageAdapter(this, R.layout.main, R.id.text1, R.id.image1, listItems, listImages )); 
    getListView().setOnItemClickListener(new OnItemClickListener() { 
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {        
            Toast.makeText(getApplicationContext(), "Test", Toast.LENGTH_SHORT).show();

        } 
    }); 
} 
} 

和我的ImageAdapter

public class ImageAdapter extends ArrayAdapter  
{  
Activity context; 
String[] items; 
boolean[] arrows; 
int layoutId; 
int textId; 
int imageId; 
ImageAdapter(Activity context, int layoutId, int imageId, String[] items, boolean[] arrows)  
{  
    super(context, layoutId, items);  
    this.context = context;  
    this.items = items; 
    this.arrows = arrows; 
    this.layoutId = layoutId; 
    this.textId = textId; 
    this.imageId = imageId; 
}  
public View getView(int pos, View convertView, ViewGroup parent)  
{  
    LayoutInflater inflater=context.getLayoutInflater();  
    View row=inflater.inflate(layoutId, null);  
    TextView label=(TextView)row.findViewById(textId);  
    label.setText(items[pos]);  
    if (arrows[pos])  
    {  
     ImageView icon=(ImageView)row.findViewById(imageId);   
        icon.setImageResource(R.drawable.ic_launcher);  
    }     
    return(row);  
}  
} 

和main.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/layercontainer"
   android:orientation="horizontal"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:background="#ffffff">     
   <ListView 
      android:id="@android:id/list"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"/> 
   <TextView
      android:id="@+id/text1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentLeft="true" 
      android:padding="10dp"
      android:textSize="16sp"
      android:textColor="#000000"    
      android:focusable="false" 
      android:focusableInTouchMode="false"
      android:clickable="false"/> 
   <ImageView
      android:id="@+id/image1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentRight="true"
      android:focusable="false" 
      android:focusableInTouchMode="false"
      android:clickable="false"/> 
 </RelativeLayout>