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android acitivities

In Android, an Activity is a single, focused thing that the user can do. An activity is a visual component that provides a user interface and interacts with the user. It represents a single screen with a user interface. Activities can be compared to windows in a desktop application.

Here are some key points to know about Android Activities:

  1. Activities are the building blocks of an Android application.

  2. Each Activity is designed to perform a specific action, and it can be started and stopped as needed.

  3. Activities can be thought of as a stack, with the most recently started Activity on top of the stack.

  4. When an Activity is started, it is pushed onto the top of the stack, and when it is stopped, it is removed from the top of the stack.

  5. An Activity can also be paused and resumed without being stopped, which allows the user to switch between Activities seamlessly.

  6. Activities can communicate with each other using Intents, which are messages that are passed between Activities.

  7. An Activity can also communicate with the operating system and other applications using system services and content providers.

  8. Activities can be defined in the AndroidManifest.xml file of an application, which is used to specify the application's components and permissions.