不要在我的Android应用程序中更改操作栏的文本颜色

Question

我想用文字做橙色动作栏。我做了以下主题

    <resources>

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
   <!-- the theme applied to the application or activity -->
    <style name="CustomActionBarTheme"
           parent="@android:style/Theme.Holo.Light">
        <item name="android:actionBarStyle">@style/MyActionBar</item>

    </style>

    <style name="MyActionBar" parent="@android:style/Widget.Holo.Light.ActionBar">
        <item name="android:background">#FF6600</item>
    <item name="android:titleTextStyle">@style/MyTheme.ActionBar.TitleTextStyle</item>
    </style>

  <style name="MyTheme.ActionBar.TitleTextStyle" parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
    <item name="android:textColor">@color/white</item>
  </style>

</resources>

最后，我在清单中设定了主题;但是当我运行应用程序时，操作栏标题的文字颜色为黑色（而不是白色）。我该怎么做？