How is the order of method execution determined at application startup?

The order of method execution when starting an Android application is determined by the lifecycle of components, particularly Activity.

Main stages when launching an Activity:

1. onCreate() — initialization, loading the interface, setting listeners.
2. onStart() — the Activity becomes visible.
3. onResume() — the Activity starts interacting with the user.

The system first calls Application.onCreate(), then creates and starts the main Activity, invoking its methods in the specified order.

If other components (Service, BroadcastReceiver) are used in the project, their lifecycle is started separately.

Thus, the order is strictly regulated by the system and determined by the lifecycle of Android components.