is there a chance to locate the greendroid actionbar (or another action bar) on the bottom of the layout? I tried to change the gravity of the ActionBar to Bottom, but it had no effect.
I'm new with this technology so if someone could help me I will be very greatful. Thanks a lot.
Without touching the source, I don't think you can.
But GreenDroid is made to help us follow the Android UI Design Patterns, so why would you use GreenDroid to not follow them?
But if you really want to, take a look at the other ActionBar library projects, as I hope one will allow you to do what you want.
https://github.com/johannilsson/android-actionbar
https://github.com/JakeWharton/ActionBarSherlock