fragment is a part of an activity which contributes its own ui to that activity fragment can be thought like a sub activity whereas the complete screen with which user interacts is called as activity
https://specialties.bayt.com/en/specialties/q/344620/what-s-the-difference-between-fragment-and-activity-in-android/
* https://developer.android.com/guide/components/activities/index.html * https://developer.android.com/guide/components/fragments.html