title: Add RelativeLayout with buttons below RecyclerView
body: <p>I need to add a RelativeLayout below my RecyclerView and was able to do so, except that the button under TOTAL(R.id.total_amount_tv) does not show:</p>
  
  <p><a href="https://i.stack.imgur.com/0I5kT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0I5kT.png" alt="enter image description here"></a> </p>
  
  <p>I can easily scroll through the items and it doesn't affect my RelativeLayout. I just need the button to be visible.</p>
  
  <pre><code>&lt;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="wrap_content"
      android:background="@android:color/white"
      android:weightSum="1"&gt;
  
      &lt;android.support.v7.widget.RecyclerView
          android:id="@+id/order_recycler"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_marginBottom="40dp"
          tools:context=".ShoppingCartActivity" /&gt;
  
      &lt;RelativeLayout
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:layout_marginBottom="10dp"
          android:layout_marginLeft="10dp"
          android:layout_marginRight="10dp"&gt;
  
          &lt;TextView
              android:id="@+id/total_tv"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignParentBottom="true"
              android:layout_alignParentLeft="true"
              android:layout_alignParentStart="true"
              android:text="@string/total"
              android:textSize="20sp"
              android:textStyle="bold|italic" /&gt;
  
          &lt;TextView
              android:id="@+id/total_amount_tv"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignParentBottom="true"
              android:layout_alignParentEnd="true"
              android:layout_alignParentRight="true"
              android:layout_alignTop="@+id/total_tv"
              android:textSize="20sp"
              android:textStyle="bold|italic" /&gt;
  
          &lt;Button
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignParentBottom="true"
              android:layout_below="@+id/total_amount_tv"
              android:layout_marginTop="51dp"
              android:background="@color/accent"
              android:onClick="onClickSendOrder"
              android:text="@string/order_btn"
              android:textColor="@android:color/white"
              android:textSize="20sp" /&gt;
      &lt;/RelativeLayout&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>