Android ICS: Remove blue divider in ActionBar?

Question

I am working on an app which will be full-screen, but will utilize some of the functionalities of the ActionBar. With the Ice Cream Sandwhich release, I see that I get a blue line divider/separator as part of the ActionBar. Normally, it would be good for consistency, but in my case I need to remove the divider.

How can I remove or style the divider of the ActionBar in ICS?

Tried setting a custom theme with "android:style/Widget.Holo.ActionBar" as parent. However, settings such as the one below has no effect

<item name="android:divider">#FFFFFF</item> 

Answer 1

The graphic asset containing the blue bottom line is the background of the action bar's container view and is set to @android:drawable/ab_transparent_dark_holo when using the default Holo Dark theme.

To remove this line, you'll need to create a custom style for your action bar (based on Widget.Holo.ActionBar or Widget.Holo.Light.ActionBar (or the .Solid variants) and set the android:background to something that doesn't include the bottom border:

<style name="MyTheme" parent="android:Theme.Holo">   <item name="android:actionBarStyle">@style/MyActionBar</item> </style>  <style name="MyActionBar" parent="android:Widget.Holo.ActionBar">   <item name="android:background">@drawable/your_background_here</item> </style> 

Note: Holo Dark/Light action bars have solid and transparent styles; this blue line appears by default for the transparent style. Holo Dark action bars are transparent by default and Holo Light action bars are solid by default.

Answer 2

Here is a simple way to remove the divider, works from API 07 using the actionbarcompat from the support library:

@Override public void onCreate(Bundle savedInstanceState) {         //...         getSupportActionBar().setBackgroundDrawable(             getResources().getDrawable(R.drawable.whatever_you_want));         //... }