ActionBar - custom view with centered ImageView, Action Items on sides

I have a requirement to center a custom logo (using an ImageView) in the Actionbar for the "Home" activity. I'm using ABS for this project. This is very similar to a another question posted on S.O. (ActionBar logo centered and Action items on sides), but I'm not sure if the ImageView or search menu makes a difference, as I'm not getting the results I'm looking for (a centered image), or if I've just got it wrong. Basically, I set an Icon on the left, insert the custom view in the center, and have a search icon on the right (OptionsMenu). The image does appear a bit to the right of the icon, but it's still left of centered. Any pointers on how to center an ImageView in the actionbar would be greatly appreciated.

Home.java:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    LayoutInflater inflater = (LayoutInflater) getSupportActionBar().getThemedContext()
            .getSystemService(LAYOUT_INFLATER_SERVICE);

    final View customActionBarView = inflater.inflate(
            R.layout.actionbar_custom_view_home, null);

    /* Show the custom action bar view and hide the normal Home icon and title */
    final ActionBar actionBar = getSupportActionBar();
    actionBar.setHomeButtonEnabled(true);
    actionBar.setDisplayHomeAsUpEnabled(false);
    actionBar.setDisplayShowTitleEnabled(false);
    actionBar.setIcon(R.drawable.ic_ab_som);
    actionBar.setCustomView(customActionBarView);
    actionBar.setDisplayShowCustomEnabled(true);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = new MenuInflater(this);
    inflater.inflate(R.menu.search, menu);
    return true;
}

res/layout/actionbar_custom_view_home.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center">

<ImageView
    android:id="@+id/actionBarLogo"
    android:contentDescription="@string/application_name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:clickable="false"
    android:duplicateParentState="false"
    android:focusable="false"
    android:longClickable="false"
    android:padding="@dimen/padding_small"
    android:src="@drawable/logo_horizontal" />

</LinearLayout>

res/menu/search.xml:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:id="@id/search_item"
        android:icon="?attr/action_search"
        android:title="@string/search_label"
        android:showAsAction="ifRoom|collapseActionView">
    </item>
</menu>

Explained:

The pink container, is the real space where you will add the view.

The trick is doing some maths, to center the View (whatever) to the middle.

In my case, the View was a TextView. Here's my full method:

public void addTextToActionBar( String textToSet )
{
    mActionbar.setDisplayShowCustomEnabled( true );

    // Inflate the custom view
    LayoutInflater inflater = LayoutInflater.from( this );
    View header = inflater.inflate( R.layout.actionbar_header, null );

    //Here do whatever you need to do with the view (set text if it's a textview or whatever)
    TextView tv = (TextView) header.findViewById( R.id.program_title );
    tv.setText( textToSet );

    // Magic happens to center it.
    int actionBarWidth = DeviceHelper.getDeviceWidth( this ); //Google for this method. Kinda easy.

    tv.measure( 0, 0 );
    int tvSize = tv.getMeasuredWidth();

    try
    {
        int leftSpace = 0;

        View homeButton = findViewById( android.R.id.home );
        final ViewGroup holder = (ViewGroup) homeButton.getParent();

        View firstChild =  holder.getChildAt( 0 );
        View secondChild =  holder.getChildAt( 1 );

        leftSpace = firstChild.getWidth()+secondChild.getWidth();
    }
    catch ( Exception ignored )
    {}

    mActionbar.setCustomView( header );

    if ( null != header )
    {
        ActionBar.LayoutParams params = (ActionBar.LayoutParams) header.getLayoutParams();

        if ( null != params )
        {
            int leftMargin =  ( actionBarWidth / 2 - ( leftSpace ) ) - ( tvSize / 2 ) ;

            params.leftMargin = 0 >= leftMargin ? 0 : leftMargin;
        }
    }
}

Layout:

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal|center_vertical|center"
    android:orientation="horizontal" >

<TextView
    android:id="@+id/program_title"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textColor="@android:color/white"
    android:contentDescription="@string/content_description_program_title"
    android:ellipsize="end"
    android:maxLines="1"
    android:textSize="22sp"/>

</RelativeLayout>

Enjoy.