What is a user interface simple?
What is user interface (UI)? The user interface (UI) is the point of human-computer interaction and communication in a device. This can include display screens, keyboards, a mouse and the appearance of a desktop. It is also the way through which a user interacts with an application or a website.
What do we call to a single screen with user interface?
An activity represents a single screen with a user interface,in-short Activity performs actions on the screen.