I tried my own Custom Action bar for getting action bar title centered on the middle. It worked. However, after I added the options menu in Action bar, the title again shift
I am sure, you are using the below to set your custom theme.
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(R.layout.abs_layout);
If not, then please add the first line. And the text in your custom layout is centered. (Gravity = Center)
Also I found a similar link here and here. Hope this helps.
Try this out as well.
I was able to accomplish what I wanted by not showing the title of the activity, and instead using a customView as you suggested. The key that I missed for a while was you must use the setCustomView(View, ActionVar.LayoutParams) method in order to get the custom view centered, simply setting a layout_gravity="center" in the custom view layout file does not work. Here's a short code snippet showing how I got it to work:
TextView customView = (TextView)
LayoutInflater.from(this).inflate(R.layout.actionbar_custom_title_view_centered,
null);
ActionBar.LayoutParams params = new
ActionBar.LayoutParams(ActionBar.LayoutParams.MATCH_PARENT,
ActionBar.LayoutParams.MATCH_PARENT, Gravity.CENTER);
customView.setText("Some centered text");
getSupportActionBar().setCustomView(customView, params);
This method is working for me on at least 3.2, 2.3, and 2.2 devices.
Source https://groups.google.com/forum/#!msg/actionbarsherlock/A9Ponma6KKI/Llsp41jWLEgJ