title: How to set elevation to Bottom navigation
body: <p>So by the <code>support V25</code>. We have new component called Bottom navigation.</p>
  
  <p>Follow the Design guidelines, the Bottom Navigation's <code>elevation</code> should be <code>8dp</code> (<a href="https://material.io/guidelines/components/bottom-navigation.html#bottom-navigation-specs" rel="noreferrer">https://material.io/guidelines/components/bottom-navigation.html#bottom-navigation-specs</a>)</p>
  
  <p>But I can't set the <code>elevation</code> to it.</p>
  
  <p>Any suggestion, example would be appreciated. Thank you!</p>
  
  <p><strong>UPDATE XML CODE</strong></p>
  
  <pre><code>&lt;RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"&gt;
  
  &lt;android.support.design.widget.BottomNavigationView
      android:id="@+id/bottom_navigation"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:elevation="8dp"
      app:elevation="8dp"
      app:itemBackground="@color/colorPrimary"
      app:itemIconTint="@drawable/bottom_nav_color_state"
      app:itemTextColor="@drawable/bottom_nav_color_state"
      app:menu="@menu/bottom_navigation_main"/&gt;
  
  &lt;FrameLayout
      android:id="@+id/contentFrame"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_above="@id/bottom_navigation"
      android:background="#EDEDED"/&gt;
  </code></pre>
  
  <p></p>