android：popupBackground不适用于上下文菜单

为什么我的styles.xml代码成功更改了操作栏溢出菜单的背景颜色,但无法更改我的应用程序中上下文菜单的背景颜色？

<style name="AppBaseTheme" parent="Theme.AppCompat.Light">
    <!--<item name="android:actionBarStyle">@style/DarkActionBar</item> -->

</style>

<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">

    <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    <item name="android:popupMenuStyle">@style/MyPopupMenu</item>
    <item name="android:itemTextAppearance">@style/MyCustomMenuTextAppearance</item>

</style>

<!-- Popup Menu Background Color styles -->
<!-- <style name="MyPopupMenu"  parent="@android:style/Widget.Holo.ListPopupWindow"> -->
<!-- <style name="MyPopupMenu"  parent="@android:style/Widget.PopupMenu"> -->
<style name="MyPopupMenu"  parent="@style/Widget.AppCompat.PopupMenu">
    <item name="android:popupBackground">@color/dark_gray</item> 
</style>
<!-- Popup Menu Text Color styles -->
<style name="MyCustomMenuTextAppearance">
    <item name="android:textColor">@color/white</item>
</style>

我已经坚持了几个小时,因此类似问题的SO解决方案都没有对我有用.

如果有帮助,这是我的Java代码,其中创建了上下文菜单：

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    AdapterView.AdapterContextMenuInfo info =
            (AdapterView.AdapterContextMenuInfo) menuInfo;
    String selectedWord = ((TextView) info.targetView).getText().toString();
    menu.setHeaderTitle(selectedWord);

    MenuInflater inflater = getActivity().getMenuInflater();
    inflater.inflate(R.menu.shopping_list_name_context, menu);
}

并且,为了完整性,这是我的上下文菜单xml,shopping_list_name_context.xml：

<item android:id="@+id/rename_shopping_list"
      android:icon="@drawable/ic_action_edit"
      android:title="@string/rename_shopping_list" />

<item android:id="@+id/empty_shopping_list"
      android:icon="@drawable/ic_action_discard"
      android:title="@string/empty_shopping_list" />

<item android:id="@+id/delete_shopping_list"
      android:icon="@drawable/ic_action_discard"
      android:title="@string/delete_shopping_list" />

并且,根据要求,这是我的AndroidManifest.xml的摘录：

<uses-sdk
    android:minSdkVersion="14"
    android:targetSdkVersion="21" />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />

<supports-screens       
    android:smallScreens="true" 
    android:normalScreens="true" 
    android:largeScreens="true" 
    android:xlargeScreens="true" />

<permission
    android:name="com.example.myapp.permission.C2D_MESSAGE"
    android:protectionLevel="signature" />

<uses-permission android:name="com.example.myapp.permission.C2D_MESSAGE" />
<uses-permission android:name="com.android.vending.BILLING" />

<application
    android:name=".MyApplication"
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name_short"
    android:theme="@style/AppTheme"
    android:largeHeap="true" >

解决方法:

下面是上下文菜单中设置背景的代码,它就像魅力一样.

在styles.xml文件中放置以下代码：

<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">

  <item name="android:itemBackground">@android:color/holo_green_dark</item>

</style>