Paytm付款网关测试阶段未显示钱包，UPI付款选项和无效的卡详细信息错误

Question

我正在尝试在android中集成paymt付款网关，并且我有一些疑问：

1. 为什么不显示钱包，UPI选项？
2. 网上银行的借记卡和信用卡付款选项中的无效卡信息错误正常运行。
3. 如果付款成功，则可以通过onTransactionResponse方法获得Success trx，但如何知道交易是否失败？
4. 这行PaytmPGService Service = PaytmPGService.getStagingService();显示了getStagingService (String) in PaytmPGService cannot be applied to () 错误，但是如果我放了PaytmPGService Service = PaytmPGService.getStagingService("");，那就很好了。

如何解决此问题？

<----------------------------->

PaytmTransactionCallbacks

 @Override
    public void onTransactionResponse(Bundle inResponse) {
        Log.d("paytm_gateway", "onTransactionResponse: "+inResponse.toString());

        String s = inResponse.getString("STATUS");
        String oid = inResponse.getString("ORDERID");
        Log.d("paytm_gateway", "onTransactionResponse: trxID: "+oid);

        if (s != null && s.equals("TXN_SUCCESS")){
            Toast.makeText(this, "Success", Toast.LENGTH_SHORT).show();
            updatePostLimit(oid);
        }
        else {
            Toast.makeText(this, "Failed", Toast.LENGTH_SHORT).show();
            finish();
        }
    }

    @Override
    public void networkNotAvailable() {
        Log.d("paytm_gateway", "networkNotAvailable: ");
    }

    @Override
    public void clientAuthenticationFailed(String inErrorMessage) {
        Log.d("paytm_gateway", "clientAuthenticationFailed: "+inErrorMessage);
    }

    @Override
    public void someUIErrorOccurred(String inErrorMessage) {
        Log.d("paytm_gateway", "someUIErrorOccurred: "+inErrorMessage);
    }

    @Override
    public void onErrorLoadingWebPage(int iniErrorCode, String inErrorMessage, String inFailingUrl) {
        Log.d("paytm_gateway", "onErrorLoadingWebPage: "+inErrorMessage+"    "+inFailingUrl);
    }

    @Override
    public void onBackPressedCancelTransaction() {
        Log.d("paytm_gateway", "onBackPressedCancelTransaction: ");
    }

    @Override
    public void onTransactionCancel(String inErrorMessage, Bundle inResponse) {
        Log.d("paytm_gateway", "onTransactionCancel: "+inErrorMessage+"     res: "+inResponse);
    }