dcms_cr_app / app / src / main / res / drawable / button_checked.xml

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

    <solid android:color="@color/mainThemeColor" />

    <corners android:radius="5dp" />
</shape>