you can add your ImageView in a CardView with attribute cardElevation=0
<android.support.v7.widget.CardView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/thumbnail_card"
card_view:cardCornerRadius="15dp"
card_view:cardElevation="0dp"
android:layout_margin="10dp">
<ImageView
android:id="@+id/thumbnail"
android:layout_width="110dp"
android:layout_height="75dp"
android:scaleType="centerCrop" />
</android.support.v7.widget.CardView>
Another easy way is to use a CardView with the corner radius and an ImageView inside:
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:cardCornerRadius="8dp"
android:layout_margin="5dp"
android:elevation="10dp">
<ImageView
android:id="@+id/roundedImageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/image"
android:background="@color/white"
android:scaleType="centerCrop"
/>
</android.support.v7.widget.CardView>
[![enter image description here][1]][1]
[1]: https://i.stack.imgur.com/g1hbB.jpg