<style name="TextPurpleLarge">
    <item name="android:textSize">24sp</item>
    <item name="android:fontFamily">@font/custom_font</item>
    <item name="android:textColor">@color/purple</item>
</style>

<style name="Button1" parent="Base.Widget.AppCompat.Button.Borderless.Colored">
    <item name="customTextStyle">TextPurpleLarge</item>
    <item name="android:colorBackground">@android:color/transparent</item>
    <item name="android:textAllCaps">false</item>
    <item name="android:padding">8dp</item>
</style>

<Button
        android:id="@+id/buttonSelect"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        style="@style/Button1"
        style="@style/TextPurpleLarge"
        />