还是那句话，在使用插件代码篇的时候，请先了解插件机制（如整合原生插件先阅读原生插件文档。非常重要。非常重要！非常重要！），如未了解，请先阅读入门篇。这里就专贴关键代码

必须先把官方sdk 依照要求一步一步的整到自己项目中。然后再来看此代码，这里是cordova 整合代码

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(function (cordova) {    var define = cordova.define;    define("cordova/plugin/wxpay", function (require, exports, module) {        var argscheck = require('cordova/argscheck'),	    exec = require('cordova/exec');        exports.pay = function (orderInfo, successCB, failCB) {            argscheck.checkArgs('AFF', 'wxpay.pay', arguments);            if (!orderInfo) {                failCB && failCB("请输入订单信息.");            } else {                exec(successCB, failCB, "WXPay", "pay", orderInfo);            }        };    });    cordova.addConstructor(function () {        if (!window.plugins) {            window.plugins = {};        }        console.log("将插件注入cordovaWXPay...");        window.plugins.wxpay = cordova.require("cordova/plugin/wxpay");        console.log("wxpay注入结果：" + typeof (window.plugins.wxpay));    });})(cordova);

Android

public class WXPayPlugin extends CordovaPlugin {	@Override	public boolean execute(String action, JSONArray args,			CallbackContext callbackContext) throws JSONException {		String WXParnter_ID = args.getString(0);		// 预支付订单id		String prepay_id = args.getString(1);		// nonceStr		String nonceStr = args.getString(2);		String timestamp = args.getString(3);		// 程序签名		String wxAppSign = args.getString(4);		if ("pay".equals(action)) {//			Log.i("ourwxpay", prepay_id + ">>>" + ">>>" + nonceStr + ">>>"//					+ ">>>" + wxAppSign+">>>"+timestamp+"WXParnter_ID"+WXParnter_ID+">>"+wxAppSign);			PayReq req = new PayReq();			req.appId = Constants.APP_ID;			req.partnerId = WXParnter_ID;			req.prepayId = prepay_id;			req.packageValue = "Sign=WXPay";			req.nonceStr = nonceStr;			req.timeStamp = timestamp;			// req.timeStamp = String.valueOf(genTimeStamp());			req.sign = wxAppSign;			// 调用支付			boolean re = Constants.api.sendReq(req);			Log.i("ourwxpay",re+"<<<");			callbackContext.success();			return true;		} else {			return false;		}	}	 }

public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler{		private static final String TAG = "MicroMsg.SDKSample.WXPayEntryActivity";	    private IWXAPI api;	    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);    	Constants.api.handleIntent(getIntent(), this);    }	@Override	protected void onNewIntent(Intent intent) {		super.onNewIntent(intent);		setIntent(intent);		Constants.api.handleIntent(getIntent(), this);	}	@Override	public void onReq(BaseReq req) {	}	@Override	public void onResp(BaseResp resp) { 		if (resp.getType() == ConstantsAPI.COMMAND_PAY_BY_WX) {			String msg = "false";			if(resp.errCode==0){				msg = "true";			}						// 通知到页面 支付工具 0--微信 1--支付宝 2--银联			String jsCode = "pay.result('0','','" + msg + "')";			yooshow.instance.ToJS(jsCode); 		}	}}

iOS

#import 
     
      @interface CDVWXPay : CDVPlugin@property (nonatomic,copy) NSString*callbackID;//Instance Method-(void) pay:(CDVInvokedUrlCommand*)command ;@end
     

#import "CDVWXPay.h"#import "Order.h"#import "Conts.h"#import "DataSigner.h"#import 
     
      #import "AppDelegate.h"@implementation CDVWXPay@synthesize callbackID;-(void)pay:(CDVInvokedUrlCommand *)command{        //合作者账号    NSString* WXPartnerID = [command.arguments objectAtIndex:0];    //预支付订单号    NSString* WXPrepayID = [command.arguments objectAtIndex:1];    //nonceStr    NSString* NonceStr = [command.arguments objectAtIndex:2];    //时间戳    NSString* Timestamp = [command.arguments objectAtIndex:3];    //appsign    NSString* AppSign = [command.arguments objectAtIndex:4];        PayReq* request = [[[PayReq alloc] init] autorelease];    request.partnerId = WXPartnerID;    request.prepayId = WXPrepayID;    request.package =@"Sign=WXPay";    request.nonceStr = NonceStr;    request.timeStamp = [Timestamp intValue];    request.sign = AppSign;    [WXApi sendReq:request];        CDVPluginResult* pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:@""];    [self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];}@end
     

-(void) onResp:(BaseResp*)resp{     if([resp isKindOfClass:[PayResp class]]){        NSString* msg = @"false";        switch (resp.errCode) {            case WXSuccess:                msg = @"true";                 break;                            default:                                break;        }         NSString *js =  [[NSString alloc]initWithFormat:@"pay.result('0','','%@')",  msg  ];        [[AppDelegate appDelegate] runJS:js];    } }

服务端相应  C# 版

/// 
        /// 微信签名（预支付订单生成）        /// 
        ///         /// 
             public WXPrepayOrderEntity WXPaySign(WXPayParam param)        {            var config = AppService.Instance.GetThirdPartyConfig();            OrderInfo orderInfo = OrderService.Instance.GetList(o => o.OrderNO == param.OrderNO).FirstOrDefault();            WXPayPrepayParam prepayParam = new WXPayPrepayParam();            prepayParam.Body = orderInfo.Subject;            // 32位内的随机串，防重发            prepayParam.Noncestr = Guid.NewGuid().ToString().Replace("-", "");            prepayParam.Out_Trade_NO = orderInfo.OrderNO;            prepayParam.ClientIP = "192.168.10.1";            prepayParam.Toatal_fee = (int)(orderInfo.TotalAmount * 100);//转换成分            prepayParam.WXTradeType = WXTradeTypeKind.APP.ToString();            //生成预支付订单号            string prepayId = PayService.Instance.GenWXPayPrepayid(prepayParam);            //再次签名            List
     
      
       > paramList = new List
       
        
         >();            paramList.Add(new KeyValuePair
         
          ("appid", config.WXOpenAppID));            paramList.Add(new KeyValuePair
          
           ("noncestr", prepayParam.Noncestr)); paramList.Add(new KeyValuePair
           
            ("package", "Sign=WXPay")); paramList.Add(new KeyValuePair
            
             ("partnerid", config.WXPayPartner)); paramList.Add(new KeyValuePair
             
              ("prepayid", prepayId)); string timestamp = Convert.ToInt64(DateTime.Now.Subtract(Convert.ToDateTime("1970-01-01")).TotalSeconds).ToString(); paramList.Add(new KeyValuePair
              
               ("timestamp", timestamp)); string appSign = GenWXPayAppSign(paramList); WXPrepayOrderEntity result = new EntityModel.Pay.Entity.WXPrepayOrderEntity(); result.WXPrepayID = prepayId; result.WXPartnerID = config.WXPayPartner; result.WXNonceStr = prepayParam.Noncestr; result.WXAppSign = appSign; result.WXTimestamp = timestamp; return result; }
              
             
            
           
          
         
        
       
      
     

/// 
        /// 验证微信支付回调，假设通过则处理订单。并返回true ,假设验证失败则直接返回false        /// 
        ///         /// 
             public string WXPayNotifyVerify(string wxNotifyString)        {            var config = AppService.Instance.GetThirdPartyConfig();            //=======【基本信息设置】=====================================            /* 微信公众号信息配置            * APPID：绑定支付的APPID（必须配置）            * MCHID：商户号（必须配置）            * KEY：商户支付密钥。參考开户邮件设置（必须配置）            * APPSECRET：公众帐号secert（仅JSAPI支付的时候须要配置）            */            WxPayConfig.APPID = config.WXOpenAppID;            WxPayConfig.MCHID = config.WXPayPartner;            WxPayConfig.KEY = config.WXPayPartner_Key;            WxPayConfig.APPSECRET = config.WXOpenAppSecret;            //=======【证书路径设置】=====================================             /* 证书路径,注意应该填写绝对路径（仅退款、撤销订单时须要）            */            WxPayConfig.SSLCERT_PATH = "cert/apiclient_cert.p12";            WxPayConfig.SSLCERT_PASSWORD = "";            //=======【支付结果通知url】=====================================             /* 支付结果通知回调url。用于商户接收支付结果            */            WxPayConfig.NOTIFY_URL = config.WXPayServer_Notify;            //=======【商户系统后台机器IP】=====================================             /* 此參数可手动配置也可在程序中自己主动获取            */            WxPayConfig.IP = "8.8.8.8";            //=======【代理server设置】===================================            /* 默认IP和port号分别为0.0.0.0和0。此时不开启代理（如有须要才设置）            */            WxPayConfig.PROXY_URL = "";            //=======【上报信息配置】===================================            /* 測速上报等级。0.关闭上报; 1.仅错误时上报; 2.全量上报            */            WxPayConfig.REPORT_LEVENL = 1;            //=======【日志级别】===================================            /* 日志等级，0.不输出日志；1.仅仅输出错误信息; 2.输出错误和正常信息; 3.输出错误信息、正常信息和调试信息            */            WxPayConfig.LOG_LEVENL = 0;            //转换数据格式并验证签名            WxPayData notifyData = new WxPayData();            try            {                notifyData.FromXml(wxNotifyString);            }            catch (WxPayException ex)            {                //若签名错误。则马上返回结果给微信支付后台                WxPayData res = new WxPayData();                res.SetValue("return_code", "FAIL");                res.SetValue("return_msg", ex.Message);                return res.ToXml();            }            //检查支付结果中transaction_id是否存在            if (!notifyData.IsSet("transaction_id"))            {                //若transaction_id不存在。则马上返回结果给微信支付后台                WxPayData res = new WxPayData();                res.SetValue("return_code", "FAIL");                res.SetValue("return_msg", "支付结果中微信订单号不存在");                return res.ToXml();            }            string transaction_id = notifyData.GetValue("transaction_id").ToString();            //查询订单。推断订单真实性            if (!QueryOrder(transaction_id))            {                //若订单查询失败，则马上返回结果给微信支付后台                WxPayData res = new WxPayData();                res.SetValue("return_code", "FAIL");                res.SetValue("return_msg", "订单查询失败");                //Log.Error(this.GetType().ToString(), "Order query failure : " + res.ToXml());                return res.ToXml();            }            //查询订单成功            else            {                //推断该笔订单是否在商户站点中已经做过处理                //假设没有做过处理。依据订单号（out_trade_no）在商户站点的订单系统中查到该笔订单的具体，并运行商户的业务程序                //假设有做过处理，不运行商户的业务程序                //注意：                //该种交易状态仅仅在两种情况下出现                //1、开通了普通即时到账，买家付款成功后。                //2、开通了高级即时到账。从该笔交易成功时间算起。过了签约时的可退款时限（如：三个月以内可退款、一年以内可退款等）后。                //成功之后改动订单状态，记帐。加花                OrderPaySuccessParam param = new OrderPaySuccessParam();                //订单号                param.OrderNO = notifyData.GetValue("out_trade_no").ToString();                //支付宝交易号                param.TradeNO = transaction_id;                //支付方式                param.PayMethod = PaymentMethodKind.Online;                //卖家收款账户                param.Account = WxPayConfig.MCHID;                //卖家收款账户银行                param.Bank = PayTypeKind.WeiXin.ToString();                //买家账户                param.PayAccount = notifyData.GetValue("openid").ToString();                //买家收款账户银行                param.PayBank = notifyData.GetValue("bank_type").ToString();                //实际支付金额                param.TotalAmount = Convert.ToDouble(Convert.ToInt32(notifyData.GetValue("total_fee")) * 0.01);                //支付时间                param.PayDate = DateTime.ParseExact(notifyData.GetValue("time_end").ToString(), "yyyyMMddHHmmss", null);                //支付工具类型                param.PayType = PayTypeKind.WeiXin;                OrderService.Instance.OrderPaySuccess(param);                WxPayData res = new WxPayData();                res.SetValue("return_code", "SUCCESS");                res.SetValue("return_msg", "OK");                //Log.Info(this.GetType().ToString(), "order query success : " + res.ToXml());                return res.ToXml();            }        }        //查询微信支付订单        private bool QueryOrder(string transaction_id)        {            WxPayData req = new WxPayData();            req.SetValue("transaction_id", transaction_id);            WxPayData res = WxPayApi.OrderQuery(req);            if (res.GetValue("return_code").ToString() == "SUCCESS" &&                res.GetValue("result_code").ToString() == "SUCCESS")            {                return true;            }            else            {                return false;            }        }