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AndroidBar返回为NULL。是因为values-v11和values-v14下面的style的主题的设置的原因。
在SDK 11的设备上，会使用第二处，SDK 14会使用第三处。
只需要将三个地方的主题分别设置就可以，结构如下：
values--------
<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="Theme.AppCompat.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. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
</style>
</resources>
values-v11--------
<resources>
<!--
Base application theme for API 11+. This theme completely replaces
AppBaseTheme from BOTH res/values/styles.xml and
res/values-v11/styles.xml on API 14+ devices.
-->
<style name="AppBaseTheme" parent="android:Theme.Holo.Light">
<!-- API 14 theme customizations can go here. -->
<item name="android:actionBarStyle">@style/my_actionbar_style</item>
</style>
<style name="my_actionbar_style" parent="@android:style/Widget.Holo.Light.ActionBar">
<item name="android:background">#ff8c00</item>
<item name="android:titleTextStyle">@style/AcBar_titleStyle</item>
<item name="android:displayOptions">showTitle</item>
</style>
<style name="AcBar_titleStyle">
<item name="android:textColor">#FFFFFF</item>
<item name="android:textSize">20sp</item>
</style>
<style name="AppTheme" parent="AppBaseTheme"></style>
</resources>
values-v14--------
<resources xmlns:android="http://schemas.android.com/apk/res/android">
<!--
Base application theme for API 14+. This theme completely replaces
AppBaseTheme from BOTH res/values/styles.xml and
res/values-v11/styles.xml on API 14+ devices.
-->
<style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
<!-- API 14 theme customizations can go here. -->
<item name="android:actionBarStyle">@style/my_actionbar_style</item>
</style>
<style name="my_actionbar_style" parent="@android:style/Widget.Holo.Light.ActionBar">
<item name="android:background">#ff8c00</item>
<item name="android:titleTextStyle">@style/AcBar_titleStyle</item>
<item name="android:displayOptions">showTitle</item>
</style>
<style name="AcBar_titleStyle">
<item name="android:textColor">#FFFFFF</item>
<item name="android:textSize">20sp</item>
</style>
<style name="AppTheme" parent="AppBaseTheme"></style>
</resources>
主要注意红色部分
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原文地址：http://www.cnblogs.com/android-joker/p/4478363.html
