title: How to add separator in menu items?
body: <p>I need to add a separator between <code>Navigation Drawer</code> menu items. </p>
  
  <p>Code for <code>NavigationDrawer</code></p>
  
  <pre><code>&lt;android.support.design.widget.NavigationView
     android:id="@+id/navigationView"
     android:layout_width="wrap_content"
     android:layout_height="match_parent"
     android:layout_gravity="start"
     android:background="@color/colorPrimary"
     android:fitsSystemWindows="true"
     android:theme="@style/NavigationTheme"
     custom:headerLayout="@layout/drawer_header"
     custom:menu="@menu/drawer_view" /&gt;
  </code></pre>
  
  <h1>drawer_view.xml</h1>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"&gt;
    &lt;group android:checkableBehavior="single"&gt;
      &lt;item
          android:id="@+id/nav_home"
          android:icon="@drawable/com_mixpanel_android_ic_bell"
          android:title="@string/home" /&gt;
      &lt;item&gt; &lt;/item&gt;
      .....
      &lt;/group&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <h1>Theme</h1>
  
  <pre><code> &lt;style name="NavigationTheme" parent="ThemeOverlay.AppCompat.Dark"&gt;
      &lt;item name="colorControlHighlight"&gt;@color/colorAccent&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/2GYWm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2GYWm.png" alt="Screenshot of navigation drawe"></a>r</p>
  
  <p>How can I add a separator (View) between two <code>menu_items</code>?</p>