Android: box shadow and border radius layout

for corner you have to use drawable like below:

<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
>

<!-- view border color and width -->
<stroke
    android:width="1dip"
    android:color="#a4a2a2" >
</stroke>

<corners android:radius="180px">

</corners>
<!-- Here is the corner radius -->

and about shadow

i think you mean android:elevation="8dp"

<Yourbox
android:width="match_parent"
android:height="match_parent"
....
android:elevation="8dp"
android:layout_gravity="center"
..
/>

You can set this shape as background of any views

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

    <!-- Drop Shadow Stack -->
    <item>
        <shape>
            <corners android:radius="4dp" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#00CCCCCC" />
        </shape>
    </item>
    <item>
        <shape>
            <corners android:radius="4dp" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#10CCCCCC" />
        </shape>
    </item>
    <item>
        <shape>
            <corners android:radius="4dp" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#20d5d5d5" />
        </shape>
    </item>
    <item>
        <shape>
            <corners android:radius="6dp" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#30cbcbcb" />
        </shape>
    </item>
    <item>
        <shape>
            <corners android:radius="4dp" />

            <padding
                android:bottom="1dp"
                android:left="1dp"
                android:right="1dp"
                android:top="1dp" />

            <solid android:color="#50bababa" />
        </shape>
    </item>

    <!-- Background -->
    <item>
        <shape>
            <solid android:color="@color/gray_100" />

            <corners android:radius="4dp" />
        </shape>
    </item>

</layer-list>

    <?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="270dp"
    android:layout_height="130dp"
    android:layout_margin="15dp"
    android:translationZ="4dp"
    app:cardCornerRadius="6dp"
    app:cardElevation="0dp">
    .....
</androidx.cardview.widget.CardView>

just use translationZ