Change Height of Android ActionBar

To change the Height of Android ActionBar,

1. Go to style.xml under values folder.

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

        <!-- set the height of Action Bar . -->
        <item name="actionBarSize">36dip</item>

    </style>

</resources>

2. Now, add <item name="actionBarSize">36dip</item>

3. Go to AndroidManifest.xml and within <application> check that android:theme is set as name-value in style tag ( AppTheme in my case)