In what situations does the lifecycle of an Activity in Android end?

The lifecycle of an Activity in Android ends in the following situations:

• When the user explicitly closes the Activity (for example, by pressing the "Back" button).
• When the system releases resources due to memory shortage, destroying Activities that are not visible to the user.
• When the finish() method is called in the application code.
• When the configuration changes (for example, screen rotation), if the Activity is not configured to handle configuration changes itself, the system will destroy and recreate the Activity.

At the moment of termination, the onDestroy() method is called, where resources can be released. However, onDestroy() is not guaranteed to be called in all cases, such as during a crash or abrupt process termination.

Thus, the end of an Activity's lifecycle is a process controlled both by the user and the system, aimed at resource release and proper management of the application's state.