How to hide the title bar for an Activity in XML with existing custom theme

Question

I want to hide the titlebar for some of my activities. The problem is that I applied a style to all my activities, therefore I can\'t simply set the theme to @android:

Answer 1

The title bar can be removed in two ways as mentioned on the developer Android page:

In the manifest.xml file:

1. Add the following in application if you want to remove it for all the activities in an app:

2. Or for a particular activity: