Firebase Database reference in android

Question

My current code is this:

String key = FirebaseDatabase.getInstance().getReference().child("posts").child("???").child("numLikes").toString;

How to get numLikes value?

refer this stackoverflow.com/a/39510554/1848157

Radhey
– Radhey

2018-12-21 07:16:39 +00:00
Commented Dec 21, 2018 at 7:16 — Radhey
– Radhey, Commented Dec 21, 2018 at 7:16
add firebase tag, reword the question and fix image display

Eriawan Kusumawardhono
– Eriawan Kusumawardhono

2018-12-21 07:47:40 +00:00
Commented Dec 21, 2018 at 7:47 — Eriawan Kusumawardhono
– Eriawan Kusumawardhono, Commented Dec 21, 2018 at 7:47

Rahul Singh Chandrabhan · Accepted Answer · 2018-12-21 07:19:59Z

2

final ArrayList<Integer> arrayList = new ArrayList<>();
        DatabaseReference dbRef = FirebaseDatabase.getInstance().getReference("posts");
        dbRef.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                arrayList.clear();
                for (DataSnapshot ds: dataSnapshot.getChildren()) {
                    int numLike = ds.child("numLikes").getValue(Integer.class);
                    arrayList.add(numLike);
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

Try this code, here you don't know pushkey so I have used forEach loop to jump one level down. The arraylist used here will contain all numLikes for your users.

answered Dec 21, 2018 at 7:19

Rahul Singh Chandrabhan

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