Firebase Android addListenerForSingleValueEvent sometimes not returning data

Question

When my application starts, I check the current user\'s details in my Firebase database (I\'m storing it\'s uid for that).

I\'m attaching addListenerForSingleValueEv

Answer 1

Please try like this. If you can't solver by this, send share me source code for this part. ...

DatabaseReference mDatabase = FirebaseDatabase.getInstance().getReference();
mDatabase.child("users").child(uid).addListenerForSingleValueEvent(new ValueEventListener() {

    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
        if (dataSnapshot.exists()){
            final HashMap dataMap = (HashMap) dataSnapshot.getValue();
            for (String key : dataMap.keySet()){
                Object data = dataMap.get(key);
                try{
                    HashMap moneyData = (HashMap) data;
                    Money money = new Money(("", "");
                }catch (ClassCastException cce){
                    try{
                        name = String.valueOf(dataMap.get("username"));
                        email = String.valueOf(dataMap.get("useremail"));
                    }catch (ClassCastException cce2){
                    }
                }
            }                            
        // do something
        }else {
        // when empty data
        }
    }
    @Override
    public void onCancelled(@NonNull DatabaseError databaseError) {
    }
});