title: adding button to a gridview in android
body: <p>I know that it may be a silly question...but I'm new to android...I have an gridview layout in my project and I used "android developer" code for writing the code...so the xml code of layout is like this :</p>
  
  <pre><code>   &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;GridView xmlns:android="http://schemas.android.com/apk/res/android" 
      android:id="@+id/gridview"
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"
      android:columnWidth="90dp"
      android:numColumns="auto_fit"
      android:verticalSpacing="10dp"
      android:horizontalSpacing="10dp"
      android:stretchMode="columnWidth"
      android:gravity="center"
  /&gt;
  </code></pre>
  
  <p>now I want to add a button to the gridview but I can't do it with drag and drop...I've tried to write the xml code of adding button but I've got this error :
  "Error in an XML file: aborting build."
  can anyone help me with this problem ?</p>