CODEWITHSUNDEEP
androidfirebasenullpointerexceptionfirebase-realtime-database
user8030578
user8030578

Reputation:

NullPointer Exception while getting Reference in Firebase Database

I'm trying to fetch data from my Firebase Database. I've initialized a variable called as tData, which has some inputs from my Activity. In which I'm going to fetch data, tData has been publically defined.

 tData[10] =getArguments().getString("sLst");

I used a toast to check if the contents are empty or not, and they aren't, tData[10] has data, but still during the below operation

 DatabaseReference databaseReference4 = firebaseDatabase.getReference("USERS/"+tData[10]+"/sList"); **
    databaseReference4.addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            tData[6]=dataSnapshot.getValue().toString();

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {

        }
    });

I get an error saying 

NullPointerException,com.google.firebase.database.FirebaseDatabase.getReference(java.lang.String) on a null object reference at **

any inputs would be helpful

Upvotes: 0

Views: 239

Answers (1)

Ziya ERKOC
Ziya ERKOC

Reputation: 839

Did you initialize firebaseDatabase object?

firebaseDatabase = FirebaseDatabase.getInstance();

Make sure you add this.

Upvotes: 1

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