android - How to center title in ActionBarSherlock with menu items? -

in order center title in topbar, set custom view actionbarsherlock this:

ab.setdisplayshowcustomenabled(true);  ab.setdisplayoptions(actionbar.display_show_custom);  ab.setcustomview(r.layout.topbar); 

my custom view:

<?xml version="1.0" encoding="utf-8"?>  <relativelayout      xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/textview"     android:layout_width="fill_parent"     android:layout_height="40dp"     android:padding="5dp"     android:background="#00ff00"     >     <imageview          android:id="@+id/sidemenubutton"         android:layout_width="40dp"         android:layout_height="40dp"         android:layout_centervertical="true"         android:src="@drawable/icon_menu"         />     <imageview          android:layout_width="300dp"         android:layout_height="wrap_content"         android:layout_centerinparent="true"         android:src="@drawable/logo"         />  </relativelayout> 

and well, works - until shows menu buttons (buttons on right).

they inflated:

@override public boolean oncreateoptionsmenu(menu menu) {     getsupportmenuinflater().inflate(r.menu.main_menu, menu);     //... } 

items:

<menu xmlns:android="http://schemas.android.com/apk/res/android" >      <item         android:id="@+id/menu_share"         android:actionproviderclass="com.actionbarsherlock.widget.shareactionprovider"         android:icon="@drawable/icon_foo"         android:showasaction="always"         android:title="@string/foo"         android:visible="false"/>  //... </menu> 

how can whole layout of topbar - such if "center", centers in available width? don't have problems possible overlapping, since centered logo , menu items images fixed size.

i measuere width of screen , set left margin dynamically, hope there's better solution this.

thanks in advance.