title: How to fade end of HorizontalScrollView?
body: <p>I have a <code>HorizontalScrollView</code> wrapped around a <code>TabLayout</code> and works great, but it's hard for the use to know that it is actually a horizontal scroll.</p>
  
  <p>How can I fade the end and maybe place an arrow at the end to give the user enough indication that it scrolls?</p>
  
  <p><img src="https://i.stack.imgur.com/cVHTc.png" alt="enter image description here"></p>
  
  <pre><code>    &lt;HorizontalScrollView
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:scrollbars="none"
          android:fillViewport="true"&gt;
          &lt;android.support.design.widget.TabLayout
              android:id="@+id/tabs"
              android:layout_width="match_parent"
              android:layout_height="wrap_content" /&gt;
      &lt;/HorizontalScrollView&gt;
  </code></pre>