<style name="Theme.glTheme" parent="android:Theme.Holo">
<item name="android:homeAsUpIndicator">@drawable/gl_up_indicator</item>
</style>
If you are supporting pre-3.0 with your application be sure you put this
version of the custom theme in values-v11 or
similar.
原文：http://www.cnblogs.com/yuyutianxia/p/3752580.html