Plataforma: 4.3

Nivel API: 18

AndroidManifest.xml:

<uses-sdk
    android:minSdkVersion="18"
    android:targetSdkVersion="18" />

valores-v14 \ styles.xml:

  <resources>

<!--
    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">
</style>

 <style name="CustomActionBarTheme"
       parent="@style/Theme.Holo.Light.DarkActionBar">
    <item name="android:actionBarStyle">@style/MyActionBar</item>
</style>

<style name="MyActionBar"
       parent="@style/Widget.Holo.Light.ActionBar.Solid.Inverse">
    <item name="android:background">@drawable/actionbar_background</item>
</style>

Soy un novato de android. ¡Muchas gracias!