Comprehensive Android Developer Bootcamp - Adding Snapshot Listener

The video tutorial explains how to implement real-time data changes using event listeners in a user interface. It covers attaching real-time functionality to data references, managing event listeners through lifecycle methods, handling exceptions, and updating the UI with document snapshot data. The tutorial also discusses the behavior of Firestore in replacing old data with new data entries.

What is the purpose of adding an event listener to the data?

Why is it suggested to override the onStart method instead of onCreate?

What happens when the activity is stopped in relation to the snapshot listener?

How does the code handle exceptions when fetching data?

What is the significance of checking if the document snapshot exists?

What is the final outcome when data is successfully saved?

Describe the behavior of Firestore when adding new data.