android - How to get the key of parent node in Realtime Firebase Database

Question

RealTime Firebase Database structured in JSON format when data is pushed in it. So if JSONObject has another JSONObject in RealTime Database, then how to get the "key" name of that JSONObject.

Given below image is the structure of Firebase Realtime Database where I want to fetch the key "January" and key "2018-01-23" from structure, how can I do it.

I tried listeners of the Firebase by passing "Neeraj" because it is known to me, but I am getting fail to fetch what is the next key name of JSON structure.

Answer 1

Waitting for answers