拉不起支付，也无回调。附上代码实现和报错截图，麻烦技术大大帮忙看看啊，十分感谢！来来回回反复检查参数，没发现问题。。。

报错截图：

java服务端核心代码：

@Override
public ResultMap unifiedOrder(HttpServletRequest request, double amount,String account) {

    String body = "123";
    String orderNo = DateUtils.creatOrderID();
    Map<String, String> returnMap = new HashMap<>();
    Map<String, String> responseMap = new HashMap<>();
    Map<String, String> requestMap = new HashMap<>();
    String nonce_str = RandomUtils.getRandom(30);
    try {
        WXPay wxpay = new WXPay(wxPayAppConfig);
        //微信分配的公众账号ID
        requestMap.put("appid", wxPayAppConfig.getAppID());
        //微信支付分配的商户号
        returnMap.put("mch_id", wxPayAppConfig.getMchID());
        // App支付类型
        requestMap.put("trade_type", "APP");
        // 接收微信支付异步通知回调地址
        requestMap.put("notify_url", wxPayAppConfig.getPayNotifyUrl());
        // 终端IP
        requestMap.put("spbill_create_ip", HttpRequestUtil.getIpAddr(request));
        // 总金额
        requestMap.put("total_fee", String.valueOf((int)(amount*100)));
        //默认人民币
        requestMap.put("fee_type","CNY");
        // 商户订单号
        requestMap.put("out_trade_no", orderNo);
        // 商品描述
        requestMap.put("body", body);
        //随机字符串，不长于32位。推荐随机数生成算法
        requestMap.put("nonce_str",nonce_str);
        //生成sign
        String createSign =  WXPayUtil.generateSignature(requestMap, wxPayAppConfig.getKey());
        requestMap.put("sign",createSign);

        Map<String, String> resultMap = wxpay.unifiedOrder(requestMap);

        //获取返回码
        String returnCode = resultMap.get("return_code");
        String returnMsg = resultMap.get("return_msg");
        log.info("返回值:"+returnMsg);
        //若返回码为SUCCESS，则会返回一个result_code,再对该result_code进行判断
        if ("SUCCESS".equals(returnCode)) {
            String resultCode = resultMap.get("result_code");
            String errCodeDes = resultMap.get("err_code_des");
            if ("SUCCESS".equals(resultCode)) {
                responseMap = resultMap;
            }
        }
        if (responseMap == null || responseMap.isEmpty()) {
            return ResultMap.error("获取预支付交易会话标识失败");
        }

        // 3、签名生成算法
        Long time = System.currentTimeMillis() / 1000;
        String timestamp = time.toString();
        //微信分配的公众账号ID
        returnMap.put("appid", wxPayAppConfig.getAppID());
        //微信支付分配的商户号
        returnMap.put("mch_id", wxPayAppConfig.getMchID());
        //微信返回的支付 交易会话ID 预支付交易会话标识
        returnMap.put("prepayid", responseMap.get("prepay_id"));
        //随机字符串，不长于32位。推荐随机数生成算法
        returnMap.put("noncestr", responseMap.get("nonce_str"));
        //商户订单号
        returnMap.put("out_trade_no",orderNo);
        //商品描述
        returnMap.put("body",body);
        returnMap.put("timestamp", timestamp);
        //微信支付签名 详见签名生成算法
        String sign = WXPayUtil.generateSignature(returnMap, wxPayAppConfig.getKey());

        resultMap.put("sign", sign);
        //时间戳，请见接口规则-参数规定
        resultMap.put("timestamp", returnMap.get("timestamp"));
        //暂填写固定值Sign=WXPay
        resultMap.put("package", "Sign=WXPay");

        //将充值记录添加到数据库
        rechargeRecordServer.insertRechargeRecord(account,amount,orderNo);

        return ResultMap.ok().put("data", resultMap);
    } catch (Exception e) {
        logger.error("订单号：{}，错误信息：{}", orderNo, e.getMessage());
        return ResultMap.error("微信支付统一下单失败");
    }
}

安卓前端核心代码：

static public void showPay(String appid, String partnerid, String prepayid, String noncestr, String timestamp, String packageX, String sign){
        Log.e(TAG, "拉起安卓层支付" + appid + partnerid);
//        WXEntryActivity.onPayRequest(appid, partnerid, prepayid,noncestr,timestamp,packageX,sign);
//        WXEntryActivity.onPayRequest(appid, partnerid, prepayid, noncestr, timestamp, packageX, sign);
        IWXAPI api = WXAPIFactory.createWXAPI(activity, Constants.APP_ID);
        api.registerApp(Constants.APP_ID);
        PayReq req = new PayReq();
        req.appId = appid;
        req.partnerId = partnerid;
        req.prepayId = prepayid;
        req.nonceStr = noncestr;
        req.timeStamp = timestamp;
        req.packageValue = packageX;
        //req.extData = "app data";
        req.sign = sign;
        // 在支付之前，如果应用没有注册到微信，应该先调用IWXMsg.registerApp将应用注册到微信
        //调用api接口，发送数据到微信
        req.checkArgs();
        api.sendReq(req);
        Log.e(TAG, "拉起安卓层支付2" + appid + partnerid);
    }