title: Scrollbar track style android
body: <p>I have a Listview and I want to give the scrollbar a style : </p>
  
  <pre><code>&lt;style name="scrollbar"&gt;
          &lt;item name="android:scrollbarAlwaysDrawVerticalTrack"&gt;true&lt;/item&gt;
          &lt;item name="android:scrollbarStyle"&gt;outsideOverlay&lt;/item&gt;
          &lt;item name="android:scrollbars"&gt;vertical&lt;/item&gt;
          &lt;item name="android:fadeScrollbars"&gt;true&lt;/item&gt;
          &lt;item name="android:scrollbarThumbVertical"&gt;@drawable/apptheme_fastscroll_thumb_holo&lt;/item&gt;
  
      &lt;/style&gt;
  </code></pre>
  
  <p>This works fine :P but no track here I would like it scrollbarVertical Track to be black thin line. I tried this drawable for line : </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;shape xmlns:android="http://schemas.android.com/apk/res/android"   android:shape="rectangle"  &gt;
      &lt;stroke android:width="1dp" android:color="@android:color/black"/&gt;
      &lt;size android:width="2dp" /&gt;
  &lt;/shape&gt;
  </code></pre>
  
  <p>But if I append this to scrollbar style like </p>
  
  <pre><code>&lt;item name="android:scrollbarTrackVertical"&gt;@drawable/track&lt;/item&gt;
  </code></pre>
  
  <p>I cant see the thumb ... </p>