Final answer:
When an app starts for the first time on Android, the onCreate() method is called. It is responsible for initializing the app's user interface and performing necessary setup.
Step-by-step explanation:
When an app starts for the first time on an Android device, Android calls the onCreate() method. This method is a part of the Activity class and is responsible for initializing the app's user interface and performing any necessary setup.
For example, if you have a shopping app, the onCreate() method can be used to inflate the layout, bind data to the views, and set up event listeners.
Other methods such as onStart(), onResume(), and onPause() are also important in the app lifecycle.