android fragments

In Android, a Fragment is a modular section of an activity that represents a part of the user interface and can be combined with other fragments to create a multi-pane user interface. A Fragment has its own lifecycle, user interface, and behavior, which can be added, removed, or replaced at runtime.

Here are some key points to know about Android Fragments:

1. Fragments are reusable components that can be combined to create flexible user interfaces.

2. A Fragment is a self-contained portion of an activity that can be added, removed, or replaced at runtime.

3. Fragments can be used to create multi-pane user interfaces, such as a master/detail view or a tabbed interface.

4. Fragments have their own lifecycle methods, which are similar to the lifecycle methods of an activity, such as onCreate(), onStart(), onResume(), onPause(), onStop(), and onDestroy().

5. Fragments can communicate with their parent activity and other fragments using interfaces.

6. Fragments can be added to an activity using the FragmentManager, which manages the lifecycle of the fragments.

7. Fragments can also be used to create dynamic user interfaces that can adapt to different screen sizes and orientations.

8. Fragments can be defined in XML layout files or added programmatically at runtime.