title: Setting a drawable causes my app to crash?
body: <p>I am adding a few <code>selector</code>s to my <code>ListView</code> to give it a customized look. I asked how to do that here <a href="https://stackoverflow.com/questions/21283233/my-listview-lost-its-behavior-after-i-changed-background-color">My ListView lost its behavior after I changed background color?</a>  </p>
  
  <p>I followed the instructions to the step. However, when I set the <code>android:background</code> for my <code>ListView</code> to point to the selectors, the app crashes. I do not know why. When I set it back to hex colors, it works.  </p>
  
  <p>Here is the selectors XML named <code>list_item_state.xml</code>:  </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item android:state_pressed="true" android:color="#808080"/&gt;
      &lt;item android:state_focused="true" android:color="#808080"/&gt;
      &lt;item android:color="#FFFAF0" /&gt;
  &lt;/selector&gt;  
  </code></pre>
  
  <p>Here is the <code>ListView</code> XML:  </p>
  
  <pre><code>&lt;ListView android:id="@+id/list" 
          android:layout_width="match_parent" 
          android:layout_height="match_parent" 
          android:background="#FFFAF0" &lt;!-- changes are made here --&gt;
          android:dividerHeight="1dp"
          android:divider="#808080"/&gt;  
  </code></pre>
  
  <p><strong>Am I doing anything wrong here?</strong></p>