I\'m want to change the up icon with applying the following style to my activity, but it doesn\'t work and but I still get the default black \'<\' icon.
Can anyo
If I remember correctly, I worked around this issue by moving you should move the android:homeAsUpIndicator and homeAsUpIndicator elements into the main theme declaration. In other words, try:
Not sure whether I also had to move up the displayOptions, but you may want to give that a go too in case above doesn't work right away.
By the way, I find naming a style AppTheme.ActionBar and then inheriting from Theme.Sherlock.Light rather confusing. If it were an ActionBar specific style, I would've expected something like Widget.Holo.Light.ActionBar (or any of the other widget styles) as the parent. If it's your main theme, I'd name it accordingly. Up to you of course.
Edit: Updated answer after Jake's comment.