title: CardView inside RecyclerView has extra margins
body: <p>I am using a CardView as element inside a RecyclerView. When doing so android automatically generates margins between the cardView and the screen and between different cardViews.</p>
  
  <pre><code>&lt;android.support.v7.widget.CardView 
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:background="@color/galleryCardBGColor"
  app:cardCornerRadius="2dp" &gt;
  
  &lt;android.support.v7.widget.RecyclerView
      android:id="@+id/my_recycler_view"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:scrollbars="vertical" /&gt;
  </code></pre>
  
  <p>I followed the instructions in the link to integrate them into my project:
  <a href="http://happilycoded.com/blog/using-recyclerview-and-cardview-in-eclipse-adt/">using-recyclerview-and-cardview-in-eclipse-adt</a></p>
  
  <p>I had been previously using a linearlayout for the list element :</p>
  
  <pre><code>&lt;LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical" &gt;
  </code></pre>
  
  <p>This was working perfectly fine, with no margins whatsoever between the list elements. I have now just placed the linear layout inside the cardView which has resulted in extra margins.</p>
  
  <p>The reason being that i want to provide exact margins to these elements, and any margins I supply now is being added over to this preexisting margins.
  I have tried supplying zero/negative paddings/margins to the cardView element but none of these work.</p>
  
  <p>Any idea, I can remove these margins or otherwise know exactly how much margin is being added.</p>