Mis on fragmentid ja millised on nende eelised võrreldes mitme tegevusega?

A fragment is a part of the user interface that exists within an activity and has its own lifecycle and set of events. Multiple fragments can be combined into a single activity, and one fragment can be used in multiple activities.

Advantages compared to using multiple activities:

• Modularity and reusability: Fragments allow dividing the UI into reusable components, making development, testing, and maintenance easier. The same fragment can be used in different activities for similar functionalities.
• Flexible UI for different screen sizes: Fragments enable creating a more flexible and responsive UI that can adapt to various screen sizes and orientations. For example, on a phone, fragments can be displayed sequentially, while on a tablet, they can be shown simultaneously side by side.
• Transaction management: Fragments have a transaction mechanism that allows adding, removing, replacing, and animating fragments dynamically during runtime.
• Simplification of interaction: Fragments simplify interaction between UI components within a single activity.
• Shared resources: Fragments within the same activity can share common resources and data stored in the parent activity.