如何获得payumoney支付的交易状态

我已经将PayUMoney与我的Android应用程序集成，事务处理正常，但我没有得到任何响应数据，我必须根据支付交易的状态执行一些操作（成功时我必须执行一些操作和失败我必须执行一些其他操作） .

Here is my code

private void callPayUGateway(String toBePaid, String firstName, String mobileNo, final String emailId) {

        PayUmoneyConfig payUmoneyConfig = PayUmoneyConfig.getInstance();
        payUmoneyConfig.setDoneButtonText("Continue");
        payUmoneyConfig.setPayUmoneyActivityTitle("PayUMoney");

        String txnId = System.currentTimeMillis() + "";
        String productName = "product_name";
        String salt = "nrn0cqVgkH";
        String marchantId = "5000051";
        String marchantKey = "mJ0vrJ0Z";

        PayUmoneySdkInitializer.PaymentParam.Builder builder = new PayUmoneySdkInitializer.PaymentParam.Builder();
        builder.setAmount(Double.parseDouble(toBePaid))
                .setTxnId(txnId)
                .setPhone(mobileNo)
                .setProductName(productName)
                .setFirstName(firstName)
                .setEmail(emailId)
                .setsUrl("https://www.payumoney.com/mobileapp/payumoney/success.php")
                .setfUrl("https://www.payumoney.com/mobileapp/payumoney/failure.php")
                .setUdf1("")
                .setUdf2("")
                .setUdf3("")
                .setUdf4("")
                .setUdf5("")
                .setUdf6("")
                .setUdf7("")
                .setUdf8("")
                .setUdf9("")
                .setUdf10("")
                .setIsDebug(false)
                .setKey(marchantKey)
                .setMerchantId(marchantId);
        try {
            mPaymentParams = builder.build();

            HashMap<String, String> params = mPaymentParams.getParams();
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append(params.get(PayUmoneyConstants.KEY) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.TXNID) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.AMOUNT) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.PRODUCT_INFO) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.FIRSTNAME) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.EMAIL) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.UDF1) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.UDF2) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.UDF3) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.UDF4) + "|");
            stringBuilder.append(params.get(PayUmoneyConstants.UDF5) + "||||||");
            //salt
            stringBuilder.append(salt);

            final String hash = hashCal(stringBuilder.toString());
            if (!hash.isEmpty()) {
                mPaymentParams.setMerchantHash(hash);
                if (AppConstants.selectedTheme != -1) {
                    PayUmoneyFlowManager.startPayUMoneyFlow(mPaymentParams, CheckoutActivity.this, AppConstants.selectedTheme, appConstants.isOverrideResultScreen());
                } else {
                    PayUmoneyFlowManager.startPayUMoneyFlow(mPaymentParams, CheckoutActivity.this, R.style.AppTheme_default, appConstants.isOverrideResultScreen());
                }
            }
        } catch (Exception e) {
            Toast.makeText(CheckoutActivity.this, e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }

请帮帮我 .