问一个gallery有关问题,请不要说gallery过时,知道者说说看，多谢

问一个gallery问题,请不要说gallery过时,知道者说说看，谢谢。
public class CGallery extends Gallery
{
    public interface IOnItemClickListener
    {
        public void onItemClick(int position);
    }

public void setOnItemClickListener(IOnItemClickListener listener)
    {
        clickListener = listener;
    }

    public boolean onSingleTapUp(android.view.MotionEvent e)
    {
        try
        {
            Field f = CGallery.class.getSuperclass().getDeclaredField("mDownTouchPosition");
            f.setAccessible(true);
            int position = f.getInt(this);
            if(clickListener!=null&&position>=0)
            {
                clickListener.onItemClick(position);
            }
        }
        catch(SecurityException e1)
        {
            e1.printStackTrace();
        }
        catch(NoSuchFieldException e1)
        {
            e1.printStackTrace();
        }
        catch(IllegalArgumentException e2)
        {
            e2.printStackTrace();
        }
        catch(IllegalAccessException e3)
        {
            e3.printStackTrace();
        }
        return false;
    }
}
//////////////////////////////////////////////////////////////////////////////////上面是gallery的新类

newGallery.setOnItemClickListener(new CGallery.IOnItemClickListener()
{
    public void onItemClick(int position)
    {
         此处是gallery子项的单击事件
    }
});



下面是gallery的布局
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/imageview_item"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"
    android:scaleType="fitCenter"
    android:background="@layout/gallery_item_selector_image" />


下面是gallery_item_selector_image.xml文件内容
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_window_focused="true" android:state_focused="true" android:drawable="@drawable/ic_gallery_item_selected" />
    <item android:state_window_focused="false" android:state_focused="true" android:drawable="@drawable/ic_gallery_item_selected" />
    <item android:state_window_focused="false" android:drawable="@color/cl_beige" />
    <item android:state_selected="true" android:drawable="@drawable/ic_gallery_item_selected" />
    <item android:state_pressed="true" android:drawable="@drawable/ic_gallery_item_selected" />
    <item android:drawable="@color/cl_beige" />
</selector>



问题在下面：
由于修改了public boolean onSingleTapUp(android.view.MotionEvent e)后，无法实现gallery_item_selector_image.xml的效果，
请问在修改onSingleTapUp后无法触发state_selecte
------解决方案--------------------
明天来看看。。