android: List view edittext data loses on scrolling

I went through almost all the similar questions and tried what was suggested (didnt understand much). I want the listview having 2 edittexts to preserve the values even after becoming invisible after scrolling. And when the edittext losses focus, i want each edittext value to be saved in a arraylist (2 arraylist - one for quantites and one for prices). which i can later save to the database. I tried having the code in the OntextChanegd method, but it doesnt seem right.

please help as it is an urgent project i am working on thank you,

public class CustomAdapter extends BaseAdapter {
ArrayList<String> names;
Context context;
ArrayList<String> itemPrices = new ArrayList<>();
ArrayList<String> quantities = new ArrayList<>();

CustomAdapter(ArrayList v, Context c) {
    names = v;
    context = c;
}

@Override
public int getCount() {
    return names.size();
}

@Override
public Object getItem(int position) {
    return names.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    try {
        final ViewHolder holder;
        // TODO Auto-generated method stub
        if (convertView == null) {
            holder = new ViewHolder();

            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.row, null);

            holder.textView = (TextView) convertView.findViewById(R.id.rowText);
            holder.editQty = (EditText) convertView.findViewById(R.id.qty);
            holder.editprice = (EditText) convertView.findViewById(R.id.price);
            holder.textView.setTextSize(20);
            holder.textView.setTextColor(Color.BLACK);

            convertView.setTag(holder);

        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.ref = position;

        holder.textView.setText(names.get(position));
        holder.editQty.setHint("Quantity");
        holder.editprice.setHint("Price");
        holder.editQty.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
        holder.editprice.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });



        return convertView;
    }catch (NumberFormatException ex){
        Toast.makeText(context,"!!!",Toast.LENGTH_SHORT).show();
        ex.printStackTrace();
    }


    return convertView;
}




private class ViewHolder {
    TextView textView;
    EditText editQty;
    EditText editprice;

    int ref;
}

}