Android集成PhonePe支付网关遇404错误求助

尝试为Android应用集成PhonePe支付网关，编写代码如下，但调用后未获取预期响应，仅返回错误信息：

something went wrong :404

实现代码 #

public class PhonePePayActivity extends BaseActivity {


String TAG ="PhonePePayActivity";
private static int B2B_PG_REQUEST_CODE = 777;

@Override
protected int getLayoutId() {
    return R.layout.activity_phone_pe_pay;
}

@Override
public void setView() {
    super.setView();

}

String apiEndPoint = "/pg/v1/pay";
String SaltKey = "a6334ff7-da0e-4d51-a9ce-76b97d518b1e";
int KeyIndex  = 1;

@RequiresApi(api = Build.VERSION_CODES.O)
@OnClick({R.id.pay_button})
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.pay_button:

            HashMap<String, Object> data = new HashMap();
            data.put("merchantTransactionId",createTrnId());    //String. Mandatory
            data.put("merchantId", "ON24MARTUAT");             //String. Mandatory
            data.put("merchantUserId", "u123");             //String. Conditional
            data.put("amount",100);                         //Long. Mandatory
            data.put("mobileNumber","8510988965");          //String. Optional
            data.put("callbackUrl","https://webhook.site/callback-url");

            PaymentInstrumentPe mPaymentInstrument = new PaymentInstrumentPe();
            mPaymentInstrument.setType("UPI_INTENT");          
            mPaymentInstrument.setTargetApp("com.phonepe.app");  
            data.put("paymentInstrument",mPaymentInstrument);  

            DeviceContextPe mDeviceContextPe = new DeviceContextPe();
            mDeviceContextPe.setDeviceOS("ANDROID");          // ENUM. Mandatory
            data.put("deviceContext", mDeviceContextPe);   //OBJECT. Mandatory

            String originalInput = new Gson().toJson(data);
            String base64Body = Base64.getEncoder().encodeToString(originalInput.getBytes());

            Log.e(TAG, "onClick: " + base64Body );

            String checksum = sha256(base64Body + apiEndPoint + SaltKey) + "###"+ KeyIndex;

            Log.e(TAG, "onClick: "+ checksum );

            B2BPGRequest b2BPGRequest = new B2BPGRequestBuilder()
                    .setData(base64Body)
                    .setChecksum(checksum)
                    .setUrl(apiEndPoint)
                    .build();
            try {
                startActivityForResult(PhonePe.getImplicitIntent(
                        this, b2BPGRequest, "com.phonepe.app.preprod"),B2B_PG_REQUEST_CODE);
            } catch(PhonePeInitException e){
                Log.e(TAG, "onClick: error-" + e.toString() );
                e.printStackTrace();
            }
            break;


    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == B2B_PG_REQUEST_CODE) {

       // Log.e(TAG, "onActivityResult: " +data.toString() );
  /*This callback indicates only about completion of UI flow.
        Inform your server to make the transaction
        status call to get the status. Update your app with the
        success/failure status.*/

    }
}

private String createTrnId() {
    Date date = new Date();
    long createTransactionId = date.getTime();

    return "on24m_"+ createTransactionId;
}



private static String sha256(String input) {
    try {
        MessageDigest digest = MessageDigest.getInstance("SHA-256");
        byte[] hash = digest.digest(input.getBytes("UTF-8"));
        StringBuilder hexString = new StringBuilder();

        for (byte b : hash) {
            String hex = Integer.toHexString(0xff & b);
            if (hex.length() == 1) hexString.append('0');
            hexString.append(hex);
        }

        return hexString.toString();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
  }
}

排查建议 #

• 环境一致性检查：调用预生产环境的PhonePe客户端（com.phonepe.app.preprod），但支付参数中的targetApp设为了生产环境的com.phonepe.app，改为com.phonepe.app.preprod，确保环境匹配。
• 参数类型修正：amount字段官方要求为Long类型，当前代码传的100是int，显式改为100L避免类型不兼容问题。
• 校验和逻辑核对：确认校验和拼接顺序是否符合官方要求——当前用的是base64Body + apiEndPoint + SaltKey，检查官方文档中校验和生成的具体规则，是否存在顺序错误或遗漏内容。
• 商户信息验证：确认merchantId（ON24MARTUAT）在预生产环境已完成注册，无拼写错误；merchantTransactionId是否保证唯一性。
• 端点与权限配置：确认API端点路径/pg/v1/pay对预生产环境有效，同时检查AndroidManifest中是否添加了PhonePe SDK所需的所有权限及Scheme配置。

参考文档 #

• Android PG SDK集成文档
• PAY API详情文档
• 交易状态查询API文档
• 服务器到服务器回调文档

内容的提问来源于stack exchange，提问作者Sudhir Singh