gistfile1.txt

 NetworkApi api = new NetworkService().getApi();

        api.sendVeridyCoupon(merchantID, couponCode)
                .subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber<JsonServerResponse<VerfiyCouponData>>() {
                    @Override
                    public void onCompleted() {
                        DisplayProcessMessage(false);
                    }

                    @Override
                    public void onError(Throwable e) {
                        DisplayProcessMessage(false);
                    }

                    @Override
                    public void onNext(JsonServerResponse<VerfiyCouponData> verfiyCouponData) {
                        if (verfiyCouponData.Content.IsValid) {
                            Intent result = new Intent();
                            verfiyCouponData.Content.CouponValue = couponEditText.getText().toString().trim();
                            verfiyCouponData.Content.MerchantId = mMerchantID;
                            result.putExtra(Const.COUPON_VALID_NAME, verfiyCouponData.Content);
                            setResult(RESULT_OK, result);
                            finish();
                        } else {
                            couponEditText.setError(verfiyCouponData.Message);
                        }

                    }
                });
    }