Android ActionBar.Tab setCustomView() doesn't fill_parent

Question

I\'m using ActionBar.Tab setCustomView() method with this layout:

Answer 1

To every created tab object just add layoutParams:

..    
tab.setLayoutParams(new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT));
actionBar.addTab(tab);

Answer 2

You have to rely on android:margin and android:padding when dealing with actionbarcompat's setCustomView

keeping in mind that it seems like the root element's padding, width, height, and margin, gets ignored.

Answer 3

If you're still having the issue, I found a way to get the whole space : ActionBar Tab with custom View not centered

Answer 4

Just ran into this myself and figured out the solution. You should create a style for the tabview that clears the background and the padding and use it in your theme.

styles.xml:

<style name="Custom.ActionBar.TabView.Empty" parent="@style/Widget.AppCompat.ActionBar.TabView">
    <item name="android:background">@null</item>
    <item name="android:padding">0dp</item>
</style>

themes.xml:

<style name="Theme.Custom" parent="@style/Theme.AppCompat.Light">
    <item name="android:actionBarTabStyle">@style/Custom.ActionBar.TabView.Empty</item>
    <item name="actionBarTabStyle">@style/Custom.ActionBar.TabView.Empty</item>
</style>