c-brain-glass/app/src/main/res/drawable/bg_selected.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <stroke
        android:width="2dp"
        android:color="#ff40FF5E" />
    <corners android:radius="4dp" />
    <padding
        android:bottom="5dp"
        android:left="10dp"
        android:right="10dp"
        android:top="5dp" />
</shape>