Firebase “Failed to convert a value of type java.util.HashMap to int”

Question

At this line of my code in my OnDataChange() method in the ValueEvenListener:

int latest = dataSnapshot.getValue(Integer.class);
         


        

Answer 1

This should work if we assume that the dataSnapshot is right.

final DatabaseReference database = FirebaseDatabase.getInstance().getReference();
database = database.child("Campaigns").child(key).child("count"); // replaced

        database.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int latest = Integer.valueOf(dataSnapshot.getValue().toString()); // replaced
                button.setText(latest + "");
            }

            @Override
        public void onCancelled(DatabaseError databaseError) {
            Toast.makeText(context, context.getString(R.string.error) + ": " + databaseError.getMessage(), Toast.LENGTH_SHORT).show();
        }
    });

Reminder : addValueEventListener will run everytime there is a change in the dataSnapshot. If you want to run it just once use addListenerForSingleValueEvent instead.