title: Grid view item not hightlight when press
body: <p>My app has a grid view, By default, Its item does not highlight when I click on it (I don't know why? ). I try to add it a list selector as below, But it does not work too,</p>
  
  <pre><code>&lt;GridView
                  android:id="@android:id/list"
                  android:layout_width="fill_parent"
                  android:layout_height="match_parent"
                  android:layout_above="@+id/load_more_process_id"
                  android:layout_alignParentTop="true"
                  android:drawSelectorOnTop="false"
                  android:listSelector="@drawable/grid_selector"
                   &gt;
              &lt;/GridView&gt;
  </code></pre>
  
  <p>Here my selector:</p>
  
  <pre><code>&lt;selector xmlns:android="http://schemas.android.com/apk/res/android" &gt;
  &lt;item android:state_pressed="true" android:drawable="@android:color/black"&gt;&lt;/item&gt;
  &lt;item android:state_pressed="false" android:drawable="@android:color/white"&gt;&lt;/item&gt;
  </code></pre>
  
  <p></p>