Android中的PayuMoney集成中出现“一些错误”

Question

我正在尝试将Payumoney集成到Android中，但总是会出现错误

  

发生了一些错误

以下是代码。

hashcal：

public static String hashCal(String hashString) {
        StringBuilder hash = new StringBuilder();
        MessageDigest messageDigest = null;
        try {
            messageDigest = MessageDigest.getInstance("SHA-512");
            messageDigest.update(hashString.getBytes());
            byte[] mdbytes = messageDigest.digest();
            for (byte hashByte : mdbytes) {
                hash.append(Integer.toString((hashByte & 0xff) + 0x100, 16).substring(1));
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return hash.toString();
    }

主要代码：

 Random rand = new Random();
                String randomString = Integer.toString(rand.nextInt()) + (System.currentTimeMillis() / 1000L);
                String txnId = hashCal(randomString).substring(0, 20);

                int amount = new BigDecimal(100).setScale(0, RoundingMode.UP).intValue();

                String hashSequence = "mLeqrgMpR|"+txnId+"|"+amount+"|Coupons|abcdef|test@gmail.com|udf1|udf2|udf3|udf4|udf5|3d7vtDalxm";

                String hash = hashCal(hashSequence);

                PayUmoneySdkInitializer.PaymentParam.Builder builder = new
                        PayUmoneySdkInitializer.PaymentParam.Builder();
                builder.setAmount(amount)                          // Payment amount
                        .setTxnId(txnId)                                             // Transaction ID
                        .setPhone("+911234567890")                                           // User Phone number
                        .setProductName("Coupons")                   // Product Name or description
                        .setFirstName("abcdef")                              // User First name
                        .setEmail("test@gmail.com")                                            // User Email ID
                        .setsUrl("https://test.payumoney.com/mobileapp/payumoney/success.php")                    // Success URL (surl)
                        .setfUrl("https://test.payumoney.com/mobileapp/payumoney/failure.php")
                        .setIsDebug(true)                              // Integration environment - true (Debug)/ false(Production)
                        .setKey("mLeqrgMpR")                        // Merchant key
                        .setMerchantId("12359971");             // Merchant ID

                PayUmoneySdkInitializer.PaymentParam paymentParam = builder.build();
                //set the hash
                paymentParam.setMerchantHash(hash);

                PayUmoneyFlowManager.startPayUMoneyFlow(paymentParam, getActivity(), R.style.AppTheme_NoActionBar,false);

每当我尝试执行上面的代码时，payumoney的活动就会完成并抛出吐司“发生了一些错误”。

我做错了什么？

感谢。