title: Add only top and bottom border on LinearLayout
body: <p>I would like to add only a bottom and a top border on my <code>Linearlayout</code>. 
  I have tried to do this :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;layer-list xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  
  &lt;item
      android:bottom="1dp"
      android:top="1dp"&gt;
      &lt;shape android:shape="rectangle"&gt;
          &lt;solid android:color="#FFFFFF" /&gt;
          &lt;stroke
              android:width="1dp"
              android:color="#000" /&gt;
      &lt;/shape&gt;
  &lt;/item&gt;
  &lt;/layer-list&gt;
  </code></pre>
  
  <p>But it add a border around the shape..</p>
  
  <p>Could you help me please ?</p>