How to create unique id in firebase in android

Question

I am using first time using firebase database. I don't know how to generate unique id firebase.

score 8 · Answer 1 · answered Aug 15 '18 at 16:46

8

You can use push().getKey() to get the unique key

FirebaseDatabase database = FirebaseDatabase.getInstance();
String key = database.getReference("quiz").push().getKey();

answered Aug 15 '18 at 16:46

Anisuzzaman Babla

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Will key create a totaly random id? – Jul 20 '19 at 03:17
Yes. It is a random id. – Anisuzzaman Babla Jul 20 '19 at 08:11

score 1 · Answer 2 · answered Aug 16 '18 at 13:39

As I see in your database, you have already used the push() method to generate a unique key for your quiz object. If you want, you can use for your quizid property the same key. So your database will look like this:

Firebase-root
   |
   --- quiz
        |
        --- -LlC8 ... XwOe
              |
              --- quizid: "-LlC8 ... XwOe"
              |
              --- //Other details

To actually get the key, please use the following code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference quizRef = rootRef.child("quiz");
String key = quizRef.push().getKey();

Having this key, you can use it to set the quizid when adding quiz objects to the database.

If don't want to use the pushed id, there is also another approach which isthe UUID which can help you generate unique keys for your quizid property.

Have you tried my solution above, does it work? – Alex Mamo Aug 17 '18 at 08:45 — Alex Mamo, Aug 17 '18 at 08:45

How to create unique id in firebase in android

2 Answers2