Class - The Class file is complied from .java file. Android will use this .class file to produce the executable apk
File - It is a block of resources, srbitrary information. It can be an y file type.
Activity - An activity is the equivalent of a Frame/Window in GUI toolkits. It is not a file or a file type it is just a class that can be extended in Android for loading UI elements on view.
File - It is a block of resources, srbitrary information. It can be an y file type.
Activity - An activity is the equivalent of a Frame/Window in GUI toolkits. It is not a file or a file type it is just a class that can be extended in Android for loading UI elements on view.