title: Can't place Floating Action Button (FAB) between header and items in DrawerLayout using RecyclerView
body: <p>I can't get the Floating Action Button (FAB) to appear in the correct position.  I want it to appear between the header and the first item in my nav drawer.</p>
  
  <p><a href="https://i.stack.imgur.com/AWzXR.png" rel="noreferrer"><img src="https://i.stack.imgur.com/AWzXR.png" alt="enter image description here"></a></p>
  
  <p>Currently, I've got it to appear in the bottom right corner of the header and NOT on top of the line between the 1st and 2nd elements (1st element = header &amp; 2nd element = first item in recyclerview).</p>
  
  <p>My app is using the following appcompat items:</p>
  
  <ul>
  <li>appcompat-v7:23.0.0</li>
  <li>recyclerview-v7:23.0.0</li>
  <li>design:23.0.0</li>
  </ul>
  
  <p>I'm using a nav drawer but I can't use the NavigationView because I need to customize the item entries and not load a simple menu.</p>
  
  <p>As you know, the drawer is really not 2 different controls.  The header is actually the '0' element in the RecyclerView.  I don't know if this makes a difference.</p>
  
  <p>Here is my current xml for the header/"0 view in RecyclerView":</p>
  
  <pre><code>     &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.design.widget.CoordinatorLayout
      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="@dimen/navdrawer_image_height"&gt;
  
  
      &lt;RelativeLayout
          xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/navDrawerHeaderView"
          android:layout_width="match_parent"
          android:layout_height="@dimen/navdrawer_image_height"&gt;
  
          &lt;ImageView
              android:id="@+id/navdrawer_image"
              android:layout_width="wrap_content"
              android:layout_height="@dimen/navdrawer_image_height"
              android:contentDescription="@string/cd_navdrawer_image"
              android:scaleType="centerCrop"
              android:src="@drawable/bg_material_design" /&gt;
  
          &lt;de.hdodenhof.circleimageview.CircleImageView
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:id="@+id/app_image"
              android:layout_width="@dimen/navdrawer_user_picture_size"
              android:layout_height="@dimen/navdrawer_user_picture_size"
              android:src="@drawable/ic_launcher"
              android:layout_marginTop="16dp"
              android:layout_marginLeft="16dp"
              android:layout_marginStart="16dp"
              app:border_width="2dp"
              app:border_color="#FF000000"/&gt;
  
          &lt;TextView
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:id="@+id/appNameTextView"
              android:text="App Name"
              android:textStyle="bold"
              android:layout_marginLeft="16dp"
              android:layout_marginStart="16dp"
              android:layout_marginBottom="16dp"
              android:layout_alignParentBottom="true"
              android:textColor="@android:color/white"/&gt;
  
      &lt;/RelativeLayout&gt;
  
      &lt;android.support.design.widget.FloatingActionButton
          android:id="@+id/fab"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_margin="16dp"
          android:clickable="true"
          android:src="@drawable/button_account"
          app:layout_anchor="@id/navDrawerHeaderView"
          app:layout_anchorGravity="bottom|right|end"
          app:elevation="4dp"/&gt;
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>I think I might have the FAB in the wrong location/file.  Here is the xml for the drawer.</p>
  
  <pre><code>     &lt;?xml version="1.0" encoding="utf-8"?&gt;
  
  &lt;android.support.v4.widget.DrawerLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/drawerLayout"
      android:layout_height="match_parent"
      android:layout_width="match_parent"
      android:fitsSystemWindows="true"&gt;
  
      &lt;!-- Content layout --&gt;
      &lt;LinearLayout
          android:layout_height="match_parent"
          android:layout_width="match_parent"
          android:orientation="vertical"&gt;
  
          &lt;include
              android:id="@+id/toolbar"
              layout="@layout/tool_bar"/&gt;
  
          &lt;FrameLayout
              android:id="@+id/contentFrame"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@drawable/init_background"&gt;
          &lt;/FrameLayout&gt;
  
      &lt;/LinearLayout&gt;
  
      &lt;!-- Pages --&gt;
      &lt;android.support.v7.widget.RecyclerView
          android:id="@+id/recyclerView"
          android:layout_width="320dp"
          android:layout_height="match_parent"
          android:layout_gravity="left"
          android:background="#ffffff"
          android:scrollbars="vertical"
          android:clickable="true"
          android:focusable="true"
          android:focusableInTouchMode="true"&gt;
  
      &lt;/android.support.v7.widget.RecyclerView&gt;
  
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>
  
  <p>HELP!!!!!</p>