Layout XML

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="android.first.activities.DashboardActivity">

    <RelativeLayout
        android:id="@+id/relativeLayout3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.CardView
            android:id="@+id/cardview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="50dp">

        <TextView
            android:id="@+id/ads_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:text="Melhores preços" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/cardview">


                <android.support.v7.widget.RecyclerView
                    android:id="@+id/recycler_ads"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="5dp"
                    android:layout_marginRight="5dp"
                    android:layout_marginTop="40dp"
                    android:scrollbars="none" />

            </LinearLayout>
        </android.support.v7.widget.CardView>
    </RelativeLayout>
</RelativeLayout>