title: Vertical SeekBar looks strange on some devices
body: <p>I am trying to get vertical SeekBar to work on all devices. On some it is showing properly: 
  <a href="https://i.stack.imgur.com/qm2mG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qm2mG.png" alt="enter image description here"></a> but on others not : <a href="https://i.stack.imgur.com/PgJ0Z.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PgJ0Z.png" alt="enter image description here"></a> , <a href="https://i.stack.imgur.com/s5t3F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/s5t3F.png" alt="enter image description here"></a> .</p>
  
  <p>I made vertical SeekBar with this trick:</p>
  
  <pre><code>&lt;Relative Layout
     ...
      &lt;FrameLayout
          android:layout_width="18dp"
          android:layout_height="match_parent"
          android:layout_alignParentRight="true"
          android:orientation="vertical"&gt;
  
          &lt;SeekBar
              android:id="@+id/seekbar_btn1"
              style="@style/Widget.AppCompat.SeekBar.Discrete"
              android:layout_width="90dp"
              android:layout_height="18dp"
              android:layout_gravity="center"
              android:background="@null"
              android:max="100"
              android:rotation="270"
              android:splitTrack="true"/&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>The SeekBar's thumb position can be fixed if I set <code>FrameLayout</code>'s <code>layout_width</code> and <code>SeekBar</code>'s <code>layout_height</code> respectively (actual SeekBar's width) to a bigger value, but then the SeekBar gets too far from the right edge, which I don't want.</p>
  
  <p>The SeekBar is included in a "button" view (16 of them in 4x4 Linear Layouts with weights) so I am not able to set <code>SeekBar</code>'s <code>layout_width</code> (which is actually height) dynamically. I fixed the value to <code>90dp</code> and I am wondering if this is the root cause of the problem and how I should tackle it. </p>
  
  <p>How can I make the SeekBar look the same on different devices?</p>