To hide the ActionBar of GreenDroid in an Android app, you have to do two things. Calling these two lines will hide your ActionBar from being displayed to the screen.
Make sure you call both of them because calling just either one of them will not give you the desired result.
The first line removes the HOME icon and the title of the ActionBar. If you do not call the second line, then the background color will be displayed. To avoid the hassle of changing the color according to your Activity‘s background color, calling the second line will fix it.