title: How to change direction of android elevation shadow?
body: <p>I have FrameLayout with android:elevation="4dp". Shadow of this elevation directed down. I want change direction of shadow to up.</p>
  
  <pre><code>&lt;FrameLayout
      android:id="@+id/container"
      android:layout_width="match_parent"
      android:layout_height="100dp"
      android:elevation="10dp"
      android:layout_marginBottom="100dp"
      android:background="@color/ColorPrimary"
      android:layout_alignParentBottom="true"
      android:layout_alignParentLeft="true"
      android:layout_alignParentStart="true"&gt;
  &lt;/FrameLayout&gt;
  </code></pre>