CODEWITHSUNDEEP
javaandroidfirebasefirebase-realtime-database
user1937692
user1937692

Reputation: 35

Get number of elements in Firebase

I want to obtain number of elements in Firebase Realtime DB.

I can get number of childs but not number of elements.

For example:

https://i.hizliresim.com/Lb46ao.png

As you see number of childs 3, my code returns 3 but I want to count all elements not childs.

root.addChildEventListener(new ChildEventListener() {
    @Override
    public void onChildAdded(DataSnapshot dataSnapshot, String s) {
        totalSize = (int) dataSnapshot.getChildrenCount(); //It gives 3, 
        //not number of elements. I want to obtain number of elements. Number of elements 1204 for now. 
    }

    @Override
    public void onChildChanged(DataSnapshot dataSnapshot, String s) {

    }

    @Override
    public void onChildRemoved(DataSnapshot dataSnapshot) {

    }

    @Override
    public void onChildMoved(DataSnapshot dataSnapshot, String s) {

    }

    @Override
    public void onCancelled(DatabaseError databaseError) {

    }
});

Upvotes: 1

Views: 1498

Answers (1)

Frank van Puffelen
Frank van Puffelen

Reputation: 598797

You're currently counting the number of properties under each child, so that gives 3: msg, name, time.

To count the number of children, you'll want to use a ValueEventListener:

root.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        totalSize = (int) dataSnapshot.getChildrenCount();
    }


    @Override
    public void onCancelled(DatabaseError databaseError) {
        throw databaseError.toException(); // don't ignore errors
    }
});

Upvotes: 3

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