can't hide the actionbar logo

Question

Somehow it does not work to hide the activity icon in my actionbar. I tried:

ActionBar ab = activity.getActionBar();
ab.setDisplayHomeAsUpEnabled(false);
ab.setDisplayUseLogoEnabled(false);

where is the bug?

Answer 1

 <item name="android:displayOptions">showTitle</item>

Answer 2

Set the display option to turn off DISPLAY_SHOW_HOME.

getActionBar().setDisplayShowHomeEnabled(false);