檢查此鏈接
http://android-developers.blogspot.in/2013/08/actionbarcompat-and-io-2013-app-source.html
自定義。看到父母的風格@android:style/Widget.Holo.Light.ActionBar
<style name="Theme.Styled" parent="@android:style/Theme.Holo.Light">
<item name="android:actionBarStyle">@style/Widget.Styled.ActionBar</item>
</style>
<style name="Widget.Styled.ActionBar"
parent="@android:style/Widget.Holo.Light.ActionBar">
<item name="android:background">@drawable/ab_custom_solid_styled</item>
<item name="android:backgroundStacked"
>@drawable/ab_custom_stacked_solid_styled</item>
<item name="android:backgroundSplit"
>@drawable/ab_custom_bottom_solid_styled</item>
</style>
如果它的API級別爲什麼你需要SupportLibrary? – Raghunandan