Initiate the Payment

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(Mandatory Step)
Step 4: Initiate the Payment
Initialize the PayUCheckoutPro SDK by passing the payment parameters prepared in the previous step and a reference to the transaction listener.
Java
Kotlin
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PayUCheckoutPro.open(
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    Activity activity, 
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    PayUPaymentParams payUPaymentParams, 
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    PayUCheckoutProListener payUCheckoutProListener)
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1
PayUCheckoutPro.open(
2
    activity: Activity, 
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    payUPaymentParams: PayUPaymentParams,  
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    payUCheckoutProListener: PayUCheckoutProListener) 
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Sample Code
Java
Kotlin
1
        PayUCheckoutPro.open(
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                this,
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                payUPaymentParams,
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                new PayUCheckoutProListener() {
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                    @Override
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                    public void onPaymentSuccess(Object response) {
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                        //Cast response object to HashMap
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                        HashMap<String,Object> result = (HashMap<String, Object>) response;
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                        String payuResponse = (String)result.get(PayUCheckoutProConstants.CP_PAYU_RESPONSE);
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                        String merchantResponse = (String) result.get(PayUCheckoutProConstants.CP_MERCHANT_RESPONSE);
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                    }
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​
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                    @Override
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                    public void onPaymentFailure(Object response) {
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                        //Cast response object to HashMap
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                        HashMap<String,Object> result = (HashMap<String, Object>) response;
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                        String payuResponse = (String)result.get(PayUCheckoutProConstants.CP_PAYU_RESPONSE);
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                        String merchantResponse = (String) result.get(PayUCheckoutProConstants.CP_MERCHANT_RESPONSE);
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                    }
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​
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                    @Override
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                    public void onPaymentCancel(boolean isTxnInitiated) {
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                    }
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​
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                    @Override
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                    public void onError(ErrorResponse errorResponse) {
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                        String errorMessage = errorResponse.getErrorMessage();
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                    }
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​
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                    @Override
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                    public void setWebViewProperties(@Nullable WebView webView, @Nullable Object o) {
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                        //For setting webview properties, if any. Check Customized Integration section for more details on this
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                    }
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​
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                    @Override
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                    public void generateHash(HashMap<String, String> valueMap, PayUHashGenerationListener hashGenerationListener) {
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                        String hashName = valueMap.get(PayUCheckoutProConstants.CP_HASH_NAME);
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                        String hashData = valueMap.get(PayUCheckoutProConstants.CP_HASH_STRING);
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                        if (!TextUtils.isEmpty(hashName) && !TextUtils.isEmpty(hashData)) {
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                            //Do not generate hash from local, it needs to be calculated from server side only. Here, hashString contains hash created from your server side.
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                            String hash = hashString;
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                            HashMap<String, String> dataMap = new HashMap<>();
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                            dataMap.put(hashName, hash);
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                            hashGenerationListener.onHashGenerated(dataMap);
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                        }
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                    }
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                }
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    );
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1
 PayUCheckoutPro.open( 
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        this, payUPaymentParams, 
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        object : PayUCheckoutProListener { 
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​
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            override fun onPaymentSuccess(response: Any) { 
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                response as HashMap<*, *> 
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                val payUResponse = response[PayUCheckoutProConstants.CP_PAYU_RESPONSE]
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                val merchantResponse = response[PayUCheckoutProConstants.CP_MERCHANT_RESPONSE]  
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            } 
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​
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            override fun onPaymentFailure(response: Any) { 
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                response as HashMap<*, *> 
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                val payUResponse = response[PayUCheckoutProConstants.CP_PAYU_RESPONSE]
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                val merchantResponse = response[PayUCheckoutProConstants.CP_MERCHANT_RESPONSE]  
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            } 
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​
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            override fun onPaymentCancel(isTxnInitiated:Boolean) { 
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            } 
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​
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            override fun onError(errorResponse: ErrorResponse) { 
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                val errorMessage: String 
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                if (errorResponse != null && errorResponse.errorMessage != null && errorResponse.errorMessage!!.isNotEmpty()) 
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                    errorMessage = errorResponse.errorMessage!! 
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                else 
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                    errorMessage = resources.getString(R.string.some_error_occurred) 
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            } 
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            override fun setWebViewProperties(webView: WebView?, bank: Any?) {
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                //For setting webview properties, if any. Check Customized Integration section for more details on this
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            }
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            override fun generateHash( 
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                valueMap: HashMap<String, String?>, 
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                hashGenerationListener: PayUHashGenerationListener 
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            ) { 
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                if ( valueMap.containsKey(CP_HASH_STRING) 
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                    && valueMap.containsKey(CP_HASH_STRING) != null 
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                    && valueMap.containsKey(CP_HASH_NAME) 
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                    && valueMap.containsKey(CP_HASH_NAME) != null) { 
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                    val hashData = valueMap[CP_HASH_STRING] 
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                    val hashName = valueMap[CP_HASH_NAME] 
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                    //Do not generate hash from local, it needs to be calculated from server side only. Here, hashString contains hash created from your server side.
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                    val hash: String? = hashString
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                    if (!TextUtils.isEmpty(hash)) { 
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                        val dataMap: HashMap<String, String?> = HashMap() 
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                        dataMap[hashName!!] = hash!! 
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                        hashGenerationListener.onHashGenerated(dataMap) 
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                    } 
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                } 
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            } 
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        })
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Set up the payment hashes
Customized Integration
Last modified 8mo ago
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Contents
Step 4: Initiate the Payment
Sample Code