title: Using App namespace in style
body: <p>I am going to give an example to demonstrate the greater point.</p>
  
  <p>Imagine my app has a number of FloatingActionButtons. Consequently, I want to create one style and reuse it. So I do the following:</p>
  
  <pre><code>&lt;style name="FabStyle” parent ="Widget.Design.FloatingActionButton"&gt;
      &lt;item name="android:layout_width"&gt;wrap_content&lt;/item&gt;
      &lt;item name="android:layout_height"&gt;wrap_content&lt;/item&gt;
      &lt;item name="android:layout_margin"&gt;16dp&lt;/item&gt;
      &lt;item name="app:backgroundTint"&gt;@color/accent&lt;/item&gt;
      &lt;item name="app:layout_anchorGravity"&gt;end|bottom&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>The problem I am having is that the code is not compiling because it is complaining about</p>
  
  <pre><code>Error:(40, 5) No resource found that matches the given name: attr 'app:backgroundTint'.
  </code></pre>
  
  <p>I tried bringing the namespace in through the <code>resources</code> tag but that is not working</p>
  
  <pre><code>&lt;resources
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:android="http://schemas.android.com/apk/res/android"
      &gt;
  </code></pre>
  
  <p>Any ideas how I might get this to work?</p>