View.OnFocusChangeListener amountOnFocusChangeListener = new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            if (!hasFocus) {
                rawInput = amount_test.getText().toString();
                Locale dutch = new Locale("nl", "NL");
                NumberFormat numberFormatDutch = NumberFormat.getCurrencyInstance(dutch);
                String formattedAmount = numberFormatDutch.format(new BigDecimal(rawInput));
                amount_test.setText(formattedAmount);
            } else {
                if (rawInput != null) {
                    amount_test.setText(rawInput);
                }
            }
        }
    };
    amount_test.setOnFocusChangeListener(amountOnFocusChangeListener);