Show ImageView partly behind transparent ActionBar

You can enable overlay mode of the ActionBar. To do it you have to set (android:)windowActionBarOverlay item in the theme to true.

<style name="MyTheme" parent="Theme.Sherlock">
    ...
    <item name="windowActionBarOverlay">true</item> <!-- for ActionBarSherlock -->
    <item name="android:windowActionBarOverlay">true</item>
</style>