为什么ListView的Item背景没有显示groupbox呢？貌似android:state_window_focused="false"没有起作用？

Question

以下是ListView的布局：
    <RelativeLayout
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content"
        android:background="#000000">
        <View
        android:layout_width="fill_parent"
        android:layout_height="368px"
        android:background="@drawable/h_bg"/>
        <ListView
        android:id="@+id/lv_main"
        android:layout_marginLeft="16px"
        android:layout_marginTop="20px"
        android:layout_width="448px"
        android:layout_height="wrap_content"
        android:cacheColorHint="#00000000"
        android:divider="#00000000"
        android:dividerHeight="10dip"
        android:listSelector="@drawable/detail_list_item_selector"
        />
   </RelativeLayout>以下是detail_list_item_selector
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- The stateful background drawable for a widget -->
    <item android:state_window_focused="false" android:drawable="@drawable/groupbox"/>
    <item android:state_pressed="true" android:drawable="@drawable/group_list_sel_feedback"/>
    <item android:state_focused="true" android:drawable="@drawable/group_list_sel_feedback"/>
    <item android:drawable="@drawable/groupbox"/>
</selector>为什么ListView的Item背景没有显示groupbox呢？貌似android:state_window_focused="false"没有起作用？

Answer 1

应该没问题
去掉<item android:drawable="@drawable/groupbox"/>试试

Answer 2

或者<item android:state_window_focused="true" android:drawable="@drawable/groupbox"/>
看看有没有变化