android - Show ImageView partly behind transparent ActionBar

Question

The Google Maps application has a transparent ActionBar, through which the map is visible.

I am able to set the transparency of the ActionBar using this:

<style name="Theme.MyTheme" parent="android:style/Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/ActionBar</item>
</style>

<style name="ActionBar" parent="@android:style/Widget.Holo.ActionBar">
    <item name="android:background">#64000000</item>
</style>

But how can I show my ImageView behind the ActionBar?

Answer 1

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>