Custom font for tabs on Android

combined.xml

<!-- add this new style to your style.xml -->
<style name="TabBar.TitleText" parent="TextAppearance.Design.Tab">
    <!--set your custom font properties-->
    <item name="android:fontFamily">@font/comicsaaaans</item>
</style>

<!-- Tabbar.axml -->
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.TabLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/sliding_tabs"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    app:tabIndicatorColor="@android:color/white"
    app:tabGravity="fill"
    app:tabMode="fixed"
    app:tabTextAppearance="@style/TabBar.TitleText"/>