Firebase realtime DB update child-CodePudding

I have a "Users" data structure like this, I want to increment the value of ttl_user by 1 when a user is signed up. And decrement it by 1 when a user has deleted their account.

How can I update the value? Thanks.

CodePudding user response：

I'm not able to comment can you please tell me if this "ttl_user" is all user value or a particular one user value if this is All User Value Than You Need To maintain one Variable. That's Help to Archive this issue.

CodePudding user response：

In your particular case, it would be as simple as:

DatabaseReference db = FirebaseDatabase.getInstance().getReference();
DatabaseReference userRef = db.child("User");
userRef.child("ttl_user").setValue(ServerValue.increment(1));

And to decrement, simply pass a negative value -1.