How To Retrieve Parent Key In Firebase Android

I want to retrieve houfxWvbwyVmbHX60IGjpNkZR9w2 key , How to do? Here is the code for the same mQuery = mfollowing.orderByChild('following').equalTo(user_id); mQuery.addListenerFor

Solution 1:

Assuming you have a DataSnapshot that points to the children rhZ4...wt2, you can call snapsthot.getRef().toString() which will return you something like https://xxx.firebaseio.com/.../houfxWvbwyVmbHX60IGjpNkZR9w2/rhZ4...wt2. From there you can extract the parent key.

From your example, after you query the database using mQuery, inside onDataChange you have a DataSnapshot.

So calling dataSnapshot.getRef().toString() will give you https://xxx.firebaseio.com/.../houfxWvbwyVmbHX60IGjpNkZR9w2/rhZ4...wt2/following.

Code to extract the parent key (put it inside your 1st onDataChange):

String reference = dataSnapshot.getRef().toString();
String[] tokens = reference.split("/");
String parentKey = tokens[tokens.length - 3];

This parentKey should be your houfxWvbwyVmbHX60IGjpNkZR9w2.