Setting an integer value in textView shows null, How to solve this in android?

Question

I fetched a value from database and stored in a variable. I exactly got the expected value. But when I try to set those value into a textview it shows null or 0. Why this happening? How to solve this?

I used,

 claimedNos = dataSnapshot.child("Claimed").getValue(int.class);

this code for getting data from database.

 valueClaimed.setText(String.valueOf(claimedNos));

this for setting value to textview.

code is here,

public int claimedNos;

      uDatabase.child(userId).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

           claimedNos = dataSnapshot.child("Claimed").getValue(Integer.class);
            Log.d("TAG","claimed nos in account  :"+claimedNos);
        }

valueClaimed.setText(claimedNos+""); , if claimedNos contains value . — Praveen Rawat, Apr 20 '18 at 10:28
Try with `Integer.toString(claimedNos)` instead of `String.valueOf...`. — Zelig63, Apr 20 '18 at 10:31
may be possible you integer value is null integer, you can not convert it null to string, — Farhana Naaz Ansari, Apr 20 '18 at 10:36
Could you please post the code where you retrieve data and set into text view? — Manish Jain, Apr 20 '18 at 10:52
@ManishJain question edited.. claimed nos in account :3 (Log value) — Proversion, Apr 20 '18 at 10:59
Check this following [link](https://stackoverflow.com/questions/42140707/retrive-string-out-of-addvalueeventlistener-firebase/42141541) — Manish Jain, Apr 20 '18 at 11:24

score 0 · Accepted Answer · answered Apr 20 '18 at 11:55

As your code posted and comments makes me assuming that you are not setting text into TextView inside listener. So I suggest you to put

valueClaimed.setText(String.valueOf(claimedNos));

inside onDataChange method like this

 public int claimedNos=0;

    uDatabase.child(userId).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

           claimedNos = dataSnapshot.child("Claimed").getValue(Integer.class);
            Log.d("TAG","claimed nos in account  :"+claimedNos);
           valueClaimed.setText(String.valueOf(claimedNos));
        }

Your code is setting value before listner listen dataChange event and it was making null and zero so now above code will set claimedNos after receiving it from firebase,

Setting an integer value in textView shows null, How to solve this in android?

1 Answers1