/../../reference/android/app/MediaRouteActionProvider.html#setRouteTypes(int)">setRouteTypes(int)</a></code> method.
 </p><p>
 Refer to <code><a href="../../../reference/android/app/MediaRouteButton.html">MediaRouteButton</a></code> for a description of the button that will
 appear in the action bar menu.  Note that instead of disabling the button
 when no routes are available, the action provider will instead make the
 menu item invisible.  In this way, the button will only be visible when it
 is possible 