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Questions and Answers
What is the purpose of the onCreate() method in an activity?
What is the purpose of the onCreate() method in an activity?
- It is called before the activity starts interacting with the user.
- It is called when the activity is no longer visible to the user.
- It is called before the activity becomes visible to the user. (correct)
- It is called when the system is about to start resuming another activity.
What is the purpose of an activity in an Android app?
What is the purpose of an activity in an Android app?
- To manage network connectivity
- To provide a focused task on a single screen (correct)
- To handle user authentication
- To store data
What is the purpose of an activity in an Android app?
What is the purpose of an activity in an Android app?
- To allow the user to customize the app layout
- To perform multiple tasks at once
- To create a single screen for a focused task (correct)
- To provide a platform for multiple screens
When is the onPause() method called in the activity lifecycle?
When is the onPause() method called in the activity lifecycle?
Which callback method is called when the activity is about to start interacting with the user?
Which callback method is called when the activity is about to start interacting with the user?
Which method is called when the system is about to start resuming another activity?
Which method is called when the system is about to start resuming another activity?
When is the onStop() callback method called?
When is the onStop() callback method called?
What happens when the activity is no longer visible to the user?
What happens when the activity is no longer visible to the user?
Which method is responsible for finishing or temporarily destroying an activity due to a configuration change?
Which method is responsible for finishing or temporarily destroying an activity due to a configuration change?
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Study Notes
- An activity is a single screen in an app for a focused task.
- It has a Java class and an associated XML layout file.
- The main activity is presented to the user at launch and can start other activities.
- The activity lifecycle includes several states and callback methods.
- onCreate() is only called once for the entire life of the activity.
- onStart() is called before the activity becomes visible to the user.
- onResume() is called before the activity starts interacting with the user.
- onPause() is called when the system is about to start resuming another activity.
- onStop() is called when the activity is no longer visible to the user.
- onDestroy() is called when the activity is finishing or temporarily destroyed due to a configuration change.
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