CODEWITHSUNDEEP
androidfirebasefirebase-realtime-database
krsna
krsna

Reputation: 4353

Not able to pull up values from Firebase database on Android

This is my JSON data structure in Firebase database:

familylist
 |- 0
    |--children
    |   |-- 0:"FGH"
    |   |-- 1:"HJU"
    |-- code: "2222"
    |-- family: "SWE"
    |-- fatherName: "ABC"
    |-- motherName: "XYZ"
 |- 1
    |--children
    |   |-- 0:"XXX"
    |   |-- 1:"YYY"
    |-- code: "3333"
    |-- family: "ABC"
    |-- fatherName: "ERT"
    |-- motherName: "XTS"

My code for retrieving Children data from firebase-database: 

DatabaseReference childrenKeyReference = FirebaseDatabase.getInstance().getReference().child("familylist").child("children").child(key);
Log.d(TAG, "children: " + childrenKeyReference);
childrenKeyReference.addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        String child = (String) dataSnapshot.getValue();
        Log.d(TAG, "Child : " + child);
    }
    @Override
    public void onCancelled(DatabaseError databaseError) {}
});

This are the details from LogCat. Null values are getting displayed. I'm not able to figure out what's wrong. Please do correct me. 

05-22 21:25:29.771 24743-24743/D/tag: children: https://bcm.firebaseio.com/familylist/children/0
05-22 21:25:29.774 24743-24743/D/tag: children: https://bcm.firebaseio.com/familylist/children/1
05-22 21:25:29.780 24743-24743/D/tag: Child : null
05-22 21:25:29.805 24743-24743/D/tag: Child : null

UPDATE

New Result after setting the order properly. I'm getting this: 

05-22 20:52:36.091 8572-8572/D/tag: children: https://bcm.firebaseio.com/familylist/0/children/0
05-22 20:52:36.097 8572-8572/D/tag: children: https://bcm.firebaseio.com/familylist/1/children/1
05-22 20:52:36.136 8572-8572/D/tag: Child : FGH
05-22 20:52:36.137 8572-8572/D/tag: Child : YYY

Upvotes: 2

Views: 38

Answers (1)

Paulo Mattos
Paulo Mattos

Reputation: 19339

You may have switched the nodes access order by accident ;)

You are currently doing this:

...child("familylist").child("children").child(key);

but maybe you should be doing:

...child("familylist").child(key).child("children");

since, according to your datamodel, familylist clearly doesn't have a children child node.

Upvotes: 2

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