Why can't the garbage collector mechanism complete the lifecycle of an Activity displaying the main screen of the application?

The automatic garbage collection mechanism (Garbage Collector) in Android cannot complete the lifecycle of an Activity that displays the main screen because there are active references held by the system and framework. The main screen is the entry point of the application, and the system keeps it in memory to ensure quick response and proper interaction with the user.

Additionally, the Activity lifecycle is managed by the system through methods like onCreate, onStart, onResume, onPause, onStop, and onDestroy. The garbage collector does not directly manage the lifecycle of components but only frees memory from objects that are no longer referenced. As long as the Activity is visible and active, there are references to it, and the GC cannot delete it.