title: how to set top border for bottom navigation bar in android as shown in image
body: <p><a href="https://i.stack.imgur.com/8jWhE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/8jWhE.png" alt="enter image description here"></a></p>
  
  <p>is it possible to set top border for bottom navigation bar in android, if  possible tell me how we can do this, i am using the new bottom navigation view of android. 
  <strong>Here is my code</strong></p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout 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="match_parent"&gt;
          &lt;LinearLayout
              android:id="@+id/app_bar_layout"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:orientation="vertical"
              android:layout_alignParentTop="true"&gt;
                  &lt;include
                      android:id="@+id/gamebar"
                      layout="@layout/gamebar_layout"
                      /&gt;
                  &lt;include
                      android:id="@+id/toolbar"
                      layout="@layout/toolbar_layout" /&gt;
          &lt;/LinearLayout&gt;
  
          &lt;!-- Let's add fragment --&gt;
          &lt;FrameLayout
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:layout_below="@+id/app_bar_layout"
              android:layout_above="@+id/bottom_navigation"
              android:id="@+id/contentContainer"/&gt;
          &lt;android.support.design.widget.BottomNavigationView
              android:id="@+id/bottom_navigation"
              android:layout_width="match_parent"
              android:layout_height="56dp"
              android:layout_alignParentBottom="true"
              app:itemBackground="@color/BottomNavigationBgColor"
              app:itemIconTint="@color/CelestialBlue"
              app:itemTextColor="@color/CelestialBlue"
              app:menu="@menu/bottom_navigation_main" /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>