Integer answersSum;
    public int average[] = {0, 0, 0, 0, 0, 0, 0, 0};

 @Override
    protected void onStart() {
        super.onStart();

        mAverageRef.child("answersSum").addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                answersSum = dataSnapshot.getValue(Integer.class);
                textViewQ2.setText(String.valueOf(answersSum));
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

        mAverageRef.child("sectorResults").addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                int i = 0;
                for(DataSnapshot resultSnapshot : dataSnapshot.getChildren())
                {
                    average[i] = resultSnapshot.getValue(Integer.class);
                    i++;
                }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

        tallenna.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                answersSum = answersSum + 1;
                mAverageRef.child("answersSum").setValue(answersSum);
                String id = mAnswersRef.push().getKey();
                for (int i=0; i < 8; i++)
                {
                    mAnswersRef.child(id).child(String.valueOf(i)).setValue(mOsaAlueTulos[i]);
                    average[i]+=mOsaAlueTulos[i];
                    mAverageRef.child("sectorResults").child(String.valueOf(i)).setValue(average[i]);
                }
            }
        });