title: My checkbox does not appear in my CheckedTextView
body: <p>Here is how I setup my checked text view. How come no check box appeared?</p>
  
  <p>I also added this but it had not effect:
          listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);</p>
  
  <pre><code> &lt;CheckedTextView
   android:id="@+id/ctv_checktext"
   android:layout_width="fill_parent"
   android:paddingLeft="2px"
   android:paddingRight="2px"
   android:paddingTop="2px"
   android:layout_height="wrap_content"
   /&gt;
  </code></pre>