title: AdView missing requied xml attribute adSize
body: <p>I attempted to display adds using code below.
  I got the error "<strong>AdView  missing requied xml attribute adSize</strong>".</p>
  
  <p>What is the problem?</p>
  
  <p>main.xml:</p>
  
  <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
   &lt;LinearLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:ads="http://schemas.android.com/apk/res/com.jms.AdmobExample"
         android:orientation="vertical"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent" &gt;
  
   &lt;com.google.ads.AdView     
         android:id="@+id/adView"
         android:layout_width="wrap_content" 
         android:layout_height="wrap_content"
         ads:adSize="BANNER"
         ads:adUnitId="a14f1d807e488dd" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>attr.xml:</p>
  
  <pre><code>  &lt;?xml version="1.0" encoding="utf-8"?&gt;
       &lt;resources&gt;
       &lt;declare-styleable name="com.google.ads.AdView"&gt;
       &lt;attr name="adSize"&gt;
       &lt;enum name="BANNER" value="1"/&gt;
       &lt;enum name="IAB_MRECT" value="2"/&gt;
       &lt;enum name="IAB_BANNER" value="3"/&gt;
       &lt;enum name="IAB_LEADERBOARD" value="4"/&gt;
    &lt;/attr&gt;
    &lt;attr name="adUnitId" format="string"/&gt;
   &lt;/declare-styleable&gt;
  &lt;/resources&gt;
  </code></pre>