The requireActivity() and requireContext() methods are both utility methods provided by the AndroidX Fragment library that obtain references to the associated Activity and Context objects respectively within a Fragment.

RequireActivity()

This method returns the Activity associated with the Fragment. It ensures that the Activity is not null and throws an IllegalStateException , if the Activity is null. It should be used when you want to access methods or components specific to the Activity such as

RequireContext()

This method returns the associated Context for the Fragment. A Context is the environment in which the Fragment is running and it provides the Fragment access to resources and services. It ensures that the Context is not null and throws an IllegalStateException if it is null. It is often used for various operations such as accessing string resources, SharedPreferences, LayoutInflater.