button_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">

    <corners android:radius="50dp"/>

    <padding
        android:bottom="@dimen/cardview_compat_inset_shadow"
        android:left="@dimen/cardview_compat_inset_shadow"
        android:right="@dimen/cardview_compat_inset_shadow"
        android:top="@dimen/cardview_compat_inset_shadow" />

</shape>