What events trigger the lifecycle method calls of an Activity in Android?

The Activity lifecycle methods in Android are called by the system in response to changes in the Activity's state and user interactions. The main events that trigger these method calls:

• onCreate() — called when the Activity is first created.
• onStart() — when the Activity becomes visible to the user.
• onResume() — when the Activity starts interacting with the user (comes to the foreground).
• onPause() — when the Activity loses focus, for example, when a dialog appears or another Activity partially covers it.
• onStop() — when the Activity is no longer visible.
• onDestroy() — when the Activity is destroyed by the system or the user.
• onRestart() — when the Activity is restarted after being stopped.

For example, when launching an app, the methods called are: onCreate → onStart → onResume. When transitioning to another Activity — onPause → onStop. When returning — onRestart → onStart → onResume.

These methods help manage resources and the state of the Activity depending on its current state.