app/src/main/res/drawable/rounded_rect.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#D8D6D6" />
<corners
android:bottomRightRadius="12dp"
android:topLeftRadius="12dp"
android:bottomLeftRadius="12dp"
android:topRightRadius="12dp"/>
</shape>