PayU money Payment Gateway Integration

Overview

Transaction Flow

Prerequisite

1. Merchant Key & Merchant Salt

• Go to https://www.payumoney.com/
• Log in to Your Account > Integration Help section -> Credentials -> Copy Merchant Key & Salt

2. Merchant ID

• Go To Your Profile
• General Details Section > Copy Merchant ID

3. Hosted PHP file for generating Hash

Copy the following PHP File and upload it on your server
<?php $key = $_POST["key"]; $txnid = $_POST["txnid"]; $amount = $_POST["amount"]; //Please use the amount value from database $productinfo = $_POST["productInfo"]; 
$firstname = $_POST["firstName"]; 
$email = $_POST["email"]; 
$udf1 = $_POST["udf1"]; 
$udf2 = $_POST["udf2"]; 
$udf3 = $_POST["udf3"]; 
$udf4 = $_POST["udf4"]; 
$udf5 = $_POST["udf5"]; 
$salt = "Your Merchant Salt"; //Please change the value with the live salt for production environment  
//hash sequence 
$hashSeq = "$key|$txnid|$amount|$productinfo|$firstname|$email|$udf1|$udf2|$udf3|$udf4|$udf5||||||$salt"; 
$hash = hash("sha512", $hashSeq); 
error_log("all posted variables:" . print_r($_POST, true));  
echo $hash;

Lets Start

1. Include Following Dependencies

//PayUMoney 
implementation 'com.payumoney.sdkui:plug-n-play:1.6.1' 
//Volley 
implementation 'com.android.volley:volley:1.1.1'

2. Setting up Your Manifest File

//Add Internet Permission  
<uses-permission android:name="android.permission.INTERNET"/>  
//add following line in application tag of manifest file android:usesCleartextTraffic="true"

3. Creating Constants (create separate Java Class for storing your PayU Money Credentials)

public class Constants {

 //your server url containing hash genration php file
 public static final String GET_HASH = "Your Server Url";

//success and failure url , you can copy the same
public static final String SURL = "https://www.payumoney.com/mobileapp/payumoney/success.php";
public static final String FURL = "https://www.payumoney.com/mobileapp/payumoney/failure.php";

//Your Merchant Account Information
public static final String MERCHANT_KEY = "Your Merchant Key";
public static final String MERCHANT_ID = "Your Merchant ID";

//For Testing set Debug = True, and False for Production
public static final boolean DEBUG = false;
        
}

4. Creating Style for payment activity

<style name="PayUMoney" parent="PayumoneyAppTheme">
    <item name="colorPrimary">?attr/colorPrimary</item>
    <item name="colorPrimaryDark">?attr/colorPrimaryDark</item>
    <item name="colorAccent">@android:color/holo_orange_dark</item>
    <item name="colorButtonNormal">@android:color/holo_orange_dark</item>
    <item name="alertDialogTheme">@style/AlertDialogStylePayUMoney</item>
    <item name="actionMenuTextColor">@color/white</item>
</style>

<style name="AlertDialogStylePayUMoney" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="colorAccent">?attr/colorPrimary</item>
    <item name="android:textColorPrimary">@color/payumoney_text_color</item>
</style>

5. create PayUmoneySdkInitializer.PaymentParam.Builder Object

private void launchPaymentFlow() {
        PayUmoneyConfig payUmoneyConfig = PayUmoneyConfig.getInstance();
        payUmoneyConfig.setPayUmoneyActivityTitle("PayU Money Integration Demo");
        payUmoneyConfig.setDoneButtonText(" Pay ");
PayUmoneySdkInitializer.PaymentParam.Builder builder = new PayUmoneySdkInitializer.PaymentParam.Builder();
        builder.setAmount(amount) //your amount
                .setTxnId(System.currentTimeMillis() + "") //unique transaction ID
                .setPhone(contact)
                .setProductName("Testing PayU Money") //you can set anything you want
                .setFirstName(fname)
                .setEmail(email)
                .setsUrl(Constants.SURL)
                .setfUrl(Constants.FURL)
                .setUdf1("")
                .setUdf2("")
                .setUdf3("")
                .setUdf4("")
                .setUdf5("")
                .setUdf6("")
                .setUdf7("")
                .setUdf8("")
                .setUdf9("")
                .setUdf10("")
                .setIsDebug(Constants.DEBUG)
                .setKey(Constants.MERCHANT_KEY)
                .setMerchantId(Constants.MERCHANT_ID);
        try {
            PayUmoneySdkInitializer.PaymentParam mPaymentParams = builder.build();
            getHashFromServer(mPaymentParams);
        } catch (Exception e) {
            Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
        }
    }

6. Requesting Hash From Server and Starting Payment Activity

private void getHashFromServer(final PayUmoneySdkInitializer.PaymentParam mPaymentParams) {
        Toast.makeText(MainActivity.this,"Getting Hash From Server ",Toast.LENGTH_SHORT).show();
        String url = Constants.GET_HASH;
        StringRequest request = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        hashFromServer = response;
                        Log.i(TAG, "onResponse: response "+response);
                        Toast.makeText(MainActivity.this,"Hash From server "+hashFromServer,Toast.LENGTH_SHORT).show();
                        if (hashFromServer.isEmpty() || hashFromServer.equals("")) {
                            Toast.makeText(MainActivity.this, "Could not generate hash", Toast.LENGTH_SHORT).show();
                        } else {
                            mPaymentParams.setMerchantHash(hashFromServer);
                            PayUmoneyFlowManager.startPayUMoneyFlow(mPaymentParams, MainActivity.this, R.style.PayUMoney, true);
                        }
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Log.i(TAG, "onErrorResponse: "+error.getMessage());
                    }
                }) {
            @Override
            protected Map<String, String> getParams() {
                Log.i(TAG, "getParams: "+mPaymentParams.getParams());
                return mPaymentParams.getParams();
            }
@Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                HashMap<String, String> headers = new HashMap<String, String>();
                headers.put("Content-Type", "application/json; charset=utf-8");
                return headers;
            }
        };
        Volley.newRequestQueue(this).add(request);
    }

7. Handling Transaction Response in OnActivityResult Method

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // Result Code is -1 send from Payumoney activity
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == PayUmoneyFlowManager.REQUEST_CODE_PAYMENT && resultCode == RESULT_OK && data != null) {
            TransactionResponse transactionResponse = data.getParcelableExtra(PayUmoneyFlowManager.INTENT_EXTRA_TRANSACTION_RESPONSE);
            ResultModel resultModel = data.getParcelableExtra(PayUmoneyFlowManager.ARG_RESULT);
// Check which object is non-null
            if (transactionResponse != null && transactionResponse.getPayuResponse() != null) {
                if (transactionResponse.getTransactionStatus().equals(TransactionResponse.TransactionStatus.SUCCESSFUL)) {
                    //Success Transaction
                } else {
                    //Failure Transaction
                }
            } else if (resultModel != null && resultModel.getError() != null) {
                Log.d(TAG, "Error response : " + resultModel.getError().getTransactionResponse());
            } else {
                Log.d(TAG, "Both objects are null!");
            }
        }
    }

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