activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<layout>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">


        <android.support.v7.widget.RecyclerView
            tools:itemCount="5"
            tools:listitem="@layout/item_list"
            android:id="@+id/myList"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

        </android.support.v7.widget.RecyclerView>


    </RelativeLayout>
</layout>