title: Selector in ListView not visible
body: <p>In my Android project I have a ListView with this item layout (it's the simple_list_item_1 layout with the new property <code>android:background</code>)</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;TextView xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@android:id/text1"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:textAppearance="?android:attr/textAppearanceLarge"
      android:gravity="center_vertical"
      android:paddingLeft="6dip"
      android:minHeight="?android:attr/listPreferredItemHeight"
      android:background="@drawable/simple_listselector"
  /&gt;
  </code></pre>
  
  <p>My <code>android:background="@drawable/simple_listselector"</code> looks like this:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item android:drawable="@color/GridSelection" android:state_activated="true"/&gt;
      &lt;item android:drawable="@color/GridSelection" android:state_checked="true"/&gt;
      &lt;item android:drawable="@color/GridSelection" android:state_selected="true"/&gt;
      &lt;item android:drawable="@color/GridSelection" android:state_pressed="true"/&gt;
      &lt;item android:drawable="@color/transparent"/&gt;
  &lt;/selector&gt;
  </code></pre>
  
  <p>But if I now call <code>setSelected(true)</code> for one of the listItems the selector is not visible. Do I have to change somthing in the selector or the item layout?</p>