title: Remove underline on Spinner Drop down and Change the color of the triangle
body: <p>I am trying to add spinner to my action bar. I am using the cusome spinner. Here is the code.</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      style="@style/block" &gt;
  
      &lt;Spinner
          android:id="@+id/action_bar_spinner"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_centerInParent="true"
          android:gravity="center" /&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>And here is the code that I am inflating in the getView method of the SpinnerAdapter to get the custom title of the spinner. Its a Text view.</p>
  
  <pre><code>android:id="@+id/spinner_title"
          style="@style/text_title"
          android:layout_alignParentRight="true"
          android:ellipsize="end"
          android:gravity="right"
          android:singleLine="true"
          android:text="@string/list_header"
          android:enabled="false" 
  </code></pre>
  
  <p>Everything is working fine. But I am getting an underline below the title of the spinner and I want to change the default grey color of the triangle on the right side of the spinner title.</p>
  
  <p>Please advise.</p>