I want to corner only the top of a cardview.
I used below property and it is rounding all the corner.
I want to show an overlap of all cards
card_view:cardCornerRadius="4dp"
here is my layout
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/card_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    card_view:cardCornerRadius="4dp"
    card_view:cardPreventCornerOverlap="false"
    >
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:id="@+id/re1">
        <TextView
            android:id="@+id/title"
            android:layout_width="match_parent"
            android:layout_height="20dp"
            android:background="@color/colorAccent"
            android:text="contact det"
            android:gravity="center_vertical"
            android:textColor="@android:color/white"
            android:textSize="14dp"/>
        <TextView
            android:id="@+id/txtName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Name"
            android:gravity="center_vertical"
            android:textSize="10dp"
            android:layout_below="@id/title"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="5dp"/>
        <TextView
            android:id="@+id/txtSurname"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Surname"
            android:gravity="center_vertical"
            android:textSize="10dp"
            android:layout_below="@id/txtName"
            android:layout_marginTop="10dp"
            android:layout_marginLeft="5dp"
            />
        <TextView
            android:id="@+id/txtEmail"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Email"
            android:textSize="10dp"
            android:layout_marginTop="10dp"
            android:layout_alignParentRight="true"
            android:layout_marginRight="150dp"
            android:layout_alignBaseline="@id/txtName"/>
        <TextView
            android:id="@+id/txtAdd"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Address"
            android:textSize="10dp"
            android:layout_alignLeft="@id/txtEmail"
            android:layout_alignBaseline="@id/txtSurname"/>
    </RelativeLayout>
    </android.support.v7.widget.CardView>