title: How to customize navigation drawer menu
body: <p>I have to customize my navigation drawer, this is a part of the code in res/menu/activity_main_drawer.xml</p>
  
  <p>
  </p>
  
  <pre><code>&lt;item
      android:title="Discover"&gt;
      &lt;menu&gt;
          &lt;item
              android:id="@+id/nav_qrcode"
              android:icon="@drawable/read_qr"
              android:title="QRCode" /&gt;
  
          &lt;item
              android:id="@+id/favorite"
              android:icon="@drawable/favorite"
              android:title="favorite" /&gt;
      &lt;/menu&gt;
  &lt;/item&gt;
  </code></pre>
  
  <p>this is the layout in res/layout/activity_home.xml</p>
  
  <pre><code>&lt;android.support.design.widget.NavigationView
      android:id="@+id/nav_view"
      android:layout_width="wrap_content"
      android:layout_height="match_parent"
      android:layout_gravity="start"
      android:fitsSystemWindows="true"
      android:background="#B59154"
      app:itemTextColor="#ffffff"
      app:menu="@menu/activity_main_drawer" /&gt;
  </code></pre>
  
  <p>I want assign to the first item a background color, how i can do this ?</p>
  
  <p>"Discover" is a category, and the others item are manù (clickable).</p>
  
  <p>I don't know how to assign to my "categories" a different layout.</p>