In what situations are fragments applicable in programming?

Fragments in Android are used to create a modular and flexible user interface. They allow breaking down the UI into independent parts that can be reused and combined in different activities.

Situations for using fragments:

• When adapting the interface for different screen sizes (for example, showing multiple fragments simultaneously on a tablet, and one on a phone).
• To implement navigation within a single screen without launching new activities.
• For dynamically changing the interface during app operation.

Fragments facilitate managing the lifecycle of UI components and make the code more organized.