Every mobile app has some form of user interface (UI), and in Android user interfaces are created using Views. If you’re just getting started with Android development, then it makes sense to ...

XML performs the same function in Android app development ... and serve as hierarchical arrangements of views. A linear layout for example places all its children in a linear vertical or ...

As well as Java class files, Android applications use XML data to declare screen layouts. Each screen in an Android app is normally represented within the application programming code as an Activity.