Firebase realtime database get key

How to Save Data to the Firebase Realtime Database in Android?

Asynchronous listeners: Data stored in a Firebase Realtime Database is retrieved by attaching an asynchronous listener to a database reference . The listener is triggered once for the initial state of the data and again anytime the data changes.

Inside Firebase in the Data tab, you are getting to see the below screen. Hover your cursor on null and click on the “+” option on the right side and click on that option. After clicking on that option. Add the data as added in the below image.2 Haz 2021