title: refer to android library project xml resource in application xml resource
body: <p>I have an Adnroid library project that defines XML resource.</p>
  
  <p>Let's use a selector drawable as an example (but I have problems with strings, styles, etc).</p>
  
  <p>LibProject/res/drawable/button_selector.xml   ... defines a selector</p>
  
  <p>LibProject/res/layout/view.xml .... uses the selector, with no problems</p>
  
  <pre><code> `&lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_below="@id/sign_up_fly_buttons"
          android:background="@drawable/button_selector"/&gt;`
  </code></pre>
  
  <p>Then I want to refer to it in a layout in my App</p>
  
  <p>AppProject/res/layout/view.xml ...</p>
  
  <pre><code>`&lt;TextView
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_below="@id/sign_up_fly_buttons"
          android:background="@drawable/button_selector"/&gt;`
  </code></pre>
  
  <p>But in the App it won't compile or let me reference it. 
  I've tried various namespace incantations to try and refer to it with no luck...</p>
  
  <p>Any ideas? </p>
  
  <p>Addition:
  I have read that the full-form for such references is:
      @[packagename:]type/id
  and if you leave out the package name then the package where this resource file is used.</p>
  
  <p>This an example would be:
      @com.mylibrary:drawable/button_selector</p>
  
  <p>But it doesn't work for me! There must be something wrong with my library setup/import?</p>
  
  <p>My library is in a separate Eclipse Android project, marked as a Library project, and is referenced from my app as a "Dependent Project" and code is built and links in fine.</p>