title: can't add border on map fragment android
body: <p>I get an issue when I try to add border on fragment, this seems not to work ...
  This is my fragment xml, but if I added on other layout like Linear or Relative Layout, this works..</p>
  
  <pre><code>&lt;fragment
          android:id="@+id/map"
          android:name="com.google.android.gms.maps.SupportMapFragment"
          android:layout_width="match_parent"
          android:layout_height="120dp"
          android:layout_below="@+id/include1"
          android:background="@drawable/border_bottom"
           /&gt;
  </code></pre>
  
  <p>and border_bottom.xml</p>
  
  <pre><code>&lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android"&gt;
    &lt;item&gt; 
      &lt;shape android:shape="rectangle"&gt;
        &lt;solid android:color="#FF0000" /&gt; 
      &lt;/shape&gt;
    &lt;/item&gt;   
      &lt;item android:bottom="5dp" &gt;  
       &lt;shape android:shape="rectangle"&gt; 
        &lt;solid android:color="#000000" /&gt;
      &lt;/shape&gt;
     &lt;/item&gt;    
   &lt;/layer-list&gt; 
  </code></pre>
  
  <p>How do I fix it ?</p>