title: How to reference a theme attribute in a style?
body: <p>I've got a following problem. I want to customize appearance of row in a list, but exception is thrown during inflating.</p>
  
  <p>piece of code in style.xml</p>
  
  <pre><code>&lt;style name="AppTheme.Main"&gt;     
      &lt;item name="item_shadowColor"&gt;#000000&lt;/item&gt;        
  &lt;/style&gt;
  &lt;style name="item_label"&gt;    
      &lt;item name="android:shadowColor"&gt;?attr/item_shadowColor&lt;/item&gt;        
  &lt;/style&gt;
  </code></pre>
  
  <p>attr.xml </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;resources&gt;
      &lt;attr name="item_shadowColor" format="color" /&gt;
  &lt;/resources&gt;
  </code></pre>
  
  <p>list_item.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:orientation="horizontal" &gt;
  
      &lt;TextView
          android:id="@id/title"
          style="@style/item_label"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"/&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>And the exception</p>
  
  <pre><code>FATAL EXCEPTION: main
   android.view.InflateException: Binary XML file line #7: Error inflating class &lt;unknown&gt;
      at android.view.LayoutInflater.createView(LayoutInflater.java:606)
      at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
      at android.view.LayoutInflater.onCreateView(LayoutInflater.java:653)
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:678)
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
      at ru.mts.goodok.adapter.CategoryListAdapter.getView(CategoryListAdapter.java:30)
      at android.widget.AbsListView.obtainView(AbsListView.java:2052)
      at android.widget.ListView.makeAndAddView(ListView.java:1820)
      at android.widget.ListView.fillDown(ListView.java:672)
      at android.widget.ListView.fillFromTop(ListView.java:732)
      at android.widget.ListView.layoutChildren(ListView.java:1673)
      at android.widget.AbsListView.onLayout(AbsListView.java:1882)
      at android.view.View.layout(View.java:11425)
      at android.view.ViewGroup.layout(ViewGroup.java:4232)
      at android.widget.RelativeLayout.onLayout(RelativeLayout.java:925)
      at android.view.View.layout(View.java:11425)
      at android.view.ViewGroup.layout(ViewGroup.java:4232)
      at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
      at android.view.View.layout(View.java:11425)
      at android.view.ViewGroup.layout(ViewGroup.java:4232)
      at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
      at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
      at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
      at android.view.View.layout(View.java:11425)
      at android.view.ViewGroup.layout(ViewGroup.java:4232)
      at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
      at android.view.View.layout(View.java:11425)
      at android.view.ViewGroup.layout(ViewGroup.java:4232)
      at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1516)
      at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2505)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loop(Looper.java:154)
      at android.app.ActivityThread.main(ActivityThread.java:4945)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:511)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
      at dalvik.system.NativeStart.main(Native Method)
   Caused by: java.lang.reflect.InvocationTargetException
      at java.lang.reflect.Constructor.constructNative(Native Method)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:417)
      at android.view.LayoutInflater.createView(LayoutInflater.java:586)
      ... 39 more
   Caused by: java.lang.NumberFormatException: Invalid int: "?2130771972"
      at java.lang.Integer.invalidInt(Integer.java:138)
      at java.lang.Integer.parse(Integer.java:375)
      at java.lang.Integer.parseInt(Integer.java:366)
      at com.android.internal.util.XmlUtils.convertValueToInt(XmlUtils.java:123)
      at android.content.res.TypedArray.getInt(TypedArray.java:254)
      at android.widget.TextView.&lt;init&gt;(TextView.java:829)
      at android.widget.TextView.&lt;init&gt;(TextView.java:489)
      ... 42 more
  </code></pre>
  
  <p>What am I doing wrong and how could I solve this problem?</p>