Android Flat ActionBar（无阴影）

Question

i'm trying to create the a flat action bar without shadow

attached image:

my style xml

<resources>

<!-- the theme applied to the application or activity -->
<style name="CustomActionBarTheme" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/MyActionBar</item>
</style>

<!-- ActionBar styles -->
<style name="MyActionBar" parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">
    <item name="android:windowContentOverlay">@null</item>
            <item name="android:windowActionBarOverlay">true</item>

    <item name="android:background">@drawable/white_bg</item>
    <item name="android:displayOptions"></item>
</style>

I'm supporting android 4.x

Any ideas ? I tried changing the style to Solid/Inverse didn't work..

white_bg attached (It's hard to see since it's white)

Answer 1

it should look like this

<resources>

<!-- the theme applied to the application or activity -->
<style name="CustomActionBarTheme" parent="@android:style/Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/MyActionBar</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

<!-- ActionBar styles -->
<style name="MyActionBar" parent="@android:style/Widget.Holo.Light.ActionBar.Solid.Inverse">

            <item name="android:windowActionBarOverlay">true</item>

    <item name="android:background">@drawable/white_bg</item>
    <item name="android:displayOptions"></item>
</style>

Answer 2

应在Activity主题（ CustomActionBarTheme ）上设置null windowContentOverlay属性，而不是在ActionBar主题上设置。