Transparent Actionbar: custom tabcolor

Solution 1:

Call setStackedBackgroundDrawable() on your ActionBar:

getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
ActionBar actionBar = getActionBar();
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#330000ff")));
actionBar.setStackedBackgroundDrawable(new ColorDrawable(Color.parseColor("#550000ff")));

This produces (as an example with some random icons and tabs, and two different bluish background colors to highlight the effect):

enter image description here

(The refresh icon is the default one, which comes with a slight transparency. The other icons are custom test icons with color #FFFFFFFF, that is, no transparency).

Solution 2:

I have done this on an project and the style was like this:

<style name="AppTheme" parent="android:Theme.Holo">
    <item name="android:windowActionBarOverlay">true</item>
    <item name="android:actionBarStyle">@style/action_bar_theme</item>
    <item name="android:actionMenuTextColor">#fff</item>
</style>

<style name="action_bar_theme" parent="@android:style/Widget.Holo.ActionBar">
    <item name="android:background">#b3000000</item>
    <item name="android:titleTextStyle">@style/action_bar_text</item>
</style>

Solution 3:

As mentioned in this article, using the following custom theme works flawlessly.

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

To apply some color tint, Gunnar's answer shows how.

ActionBar actionBar = getActionBar();
actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#330000ff")));
actionBar.setStackedBackgroundDrawable(new ColorDrawable(Color.parseColor("#550000ff")));

Solution 4:

Here is my code to fully transparent Actionbar

<!-- Base application theme. -->
<style name="TransparentTheme" parent="android:Theme.Holo.Light">
    <!-- Customize your theme here. -->
    <item name="android:windowBackground">@null</item>
    <item name="android:actionBarStyle">@style/ActionBarStyle.Transparent</item>
    <item name="android:windowActionBarOverlay">true</item>
</style>

<style name="ActionBarStyle.Transparent" parent="android:Widget.ActionBar">
    <item name="android:background">@null</item>
    <item name="android:displayOptions">showHome|showTitle</item>
    <item name="android:titleTextStyle">@style/ActionBarStyle.Transparent.TitleTextStyle</item>
</style>

<style name="ActionBarStyle.Transparent.TitleTextStyle" parent="@android:style/TextAppearance.Holo.Widget.ActionBar.Title">
    <item name="android:textColor">@android:color/white</item>
</style>