title: z-index in Relative layout
body: <p>I need to place a TextView above the Button in RelativeLayout. But it is not working: TextView is always under the Button, even if I move it before the button. 
  I also tried <code>bringChildToFront()</code> function to move textview on front, but no luck.</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/rlBottom"
  android:layout_width="fill_parent"
  android:layout_height="match_parent"&gt;
  
  &lt;Button
      android:id="@+id/bVio"
      android:layout_width="wrap_content"
      android:layout_height="50dip"
      android:layout_alignParentLeft="true"
      android:text="VIO"&gt;&lt;/Button&gt;
  
      &lt;TextView
          android:id="@+id/bVio_count"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignRight="@+id/bVio"
          android:layout_marginTop="6dip"
          android:layout_marginRight="6dip"
          android:text="00"
          android:textSize="15dip"
          android:textColor="#FF0000"/&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>