kunkhmer_android/app/src/main/res/drawable/bg_primary.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/colorPrimary" />
    <corners android:radius="5dp"/>
    <padding android:left="5dp" android:top="2dp"
        android:right="5dp" android:bottom="2dp"/>
</shape>