title: Placing one image over another image in android
body: <p>I have a imageButton in android which user clicks. Then after his click I want t0 show a tick or a cross image on the toip of it.
  How is it possible?</p>
  
  <pre><code>            &lt;ImageButton android:layout_width="wrap_content"
              android:text="Button" android:id="@+id/button1"
              android:layout_height="wrap_content" android:layout_gravity="center_horizontal"
              android:background="@drawable/rhino" android:layout_marginRight="20dp"&gt;&lt;/ImageButton&gt;
  </code></pre>