M_RecyclerView layout

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:paddingLeft="@dimen/activity_horizontal_margin" 
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:paddingTop="@dimen/activity_vertical_margin"
                android:paddingBottom="@dimen/activity_vertical_margin"
                tools:context=".MyActivity">
   <android.support.v7.widget.RecyclerView
             android:id="@+id/cardList"
             android:layout_width="match_parent"
             android:layout_height="match_parent"/>
</RelativeLayout>