国庆假期回来,我把参数粘上来

PayReq req = new PayReq();
                req.appId = WxConfig.appid;
                req.partnerId = WxConfig.mch_id;
                req.prepayId= prepay_idB;
                req.nonceStr= nonce_strB;
                req.timeStamp= timeStr;
                req.packageValue = "Sign=WXPay";
                req.sign= signB;
                // req.extData = "app data";
                Log.d("WXPay","正常调起支付");
                wxApi.sendReq(req);