title: Illegal resource reference: @*android resources are private and not always present
body: <pre><code>&lt;style name="mystyle" parent="@*android:style/Widget.Holo.NumberPicker"&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>when i use it in my style,system report the error " Illegal resource reference: @*android resources are private and not always present",what is the problem</p>