title: How do you get "android:" tag values in a Custom View
body: <p>There seems to be a lot of "similar" questions and answers to this scattered around which all refer to how to get a custom attribute from an <code>AttributeSet</code>. What I haven't been able to find so far is how to get an <code>android:</code> namespace tag:</p>
  
  <pre><code>    &lt;com.custom.view.StatusThumbnail
          android:id="@+id/statusThumbnailContainer"
          android:layout_width="0dp"
          android:layout_height="wrap_content"
          android:layout_margin="5dp"
          android:layout_weight="1"/&gt;
  </code></pre>
  
  <p>I would like to pull back the <code>layout_height</code> attribute from this custom component. Unfortunately from what I've read the closest I've got to how to do this is:</p>
  
  <pre><code>public StatusThumbnail(Context context, AttributeSet attrs) {
      super(context, attrs);
  
      String height = attrs.getAttributeValue("android", "layout_height");
  </code></pre>
  
  <p>But this returns <code>null</code>. </p>
  
  <p>Surely this isn't a rare thing to try and do?</p>