java 反射调用支付SDK

在android开发中会遇到各种SDK的接入，很是麻烦。最初在想能不能把所有的SDK都 融合到一个当中，发现有点异想天开。但是也可以解决SDK资源不小心没有引入，导致程序调用接口崩溃问题。经过查资料，还是写了一个小Demo，仅供参 考！很早之前写的了，估计移动基地SDK，有变动，不过道理是一样的。

仅以移动基地SDK举例。

1.移动支付需要的SO文件导入

    public class CarrotApplication extends Application {
        //是否含有移动支付SDK
        boolean useCMBilling = false;
        @Override
        public void onCreate() {
            // TODO Auto-generated method stub
            try {
                Class.forName("cn.cmgame.billing.api.GameInterface");
                useCMBilling = true;
            } catch (ClassNotFoundException ignored) {  

            }
            if(useCMBilling){
                System.loadLibrary("megjb");
            }
        }
    }  

2.初始化移动基地支付

protected void init_cmcc(String app_name, String app_company,
            String telphone_number) {
        try {
            Object [] cmcc_init_obj = {CarrotPaySDK.mContext,app_name,app_company,telphone_number};
            Class<?> [] classparam = {Activity.class,String.class,String.class,String.class};
            cfcaim.invokeStaticMethod("cn.cmgame.billing.api.GameInterface","initializeApp",cmcc_init_obj,classparam);
        } catch (Exception e) {
            // TODO: handle exception
            Log.e("init_cmcc异常捕捉", "异常："+e.toString());
        }
    } 

3.上面 invokeStaticMethod 的实现

    /**
         * 执行某个类的静态方法
         * @param   className       类名
         * @param   methodName      方法名
         * @param   oArray          方法参数
         * @param   paramTypeArray      构造参数类型
         * @author liudb
         * */
        public Object invokeStaticMethod(String className, String methodName,
                Object[] oArray,Class<?> [] paramTypeArray) throws Exception {
            Class<?> ownerClass = Class.forName(className);
            Method method = ownerClass.getMethod(methodName, paramTypeArray);
            return method.invoke(ownerClass, oArray);
        }  

4.调用支付接口

/**
     * 执行移动支付
     * @param       isUsesim        sim卡是否可用
     * @param       isRepeat        计费点是否可重复
     * @param       index           计费点编号
     * @param       order           订单号
     * @param       callback        支付回调
     */
    protected void cmcc_pay(boolean isUsesim,boolean isRepeat,String index,String order,final CarrotPayCallBack callback){
        try {
            //这里的 callback  是自定义的回调函数，会在步骤7里介绍
                        cmcc_PayendHandler = new CarrotHandler(CarrotPaySDK.mContext){
                @Override
                public void handleMessage(Message msg) {
                    // TODO Auto-generated method stub
                    super.handleMessage(msg);
                                        //这里处理返回结果
                                        callback.onPayEnd(msg.what);
                }
            };
            // 传入参数
            Object [] cmcc_pay_param = {CarrotPaySDK.mContext,isUsesim,isRepeat,index,order,new Object()};
            // 参数对应的TYPE
            Class<?> [] cmcc_pay_paramtyp = {Context.class,boolean.class,boolean.class,String.class,String.class,Object.class};
            // "IPayCallback" 是移动支付的回调函数名
            cfcaim.invokeContainsInterfaceStaticMethod("cn.cmgame.billing.api.GameInterface", "doBilling", cmcc_pay_param,cmcc_pay_paramtyp,"IPayCallback",CarrotPaySdkFinal.CMCC_PAY);
        } catch (Exception e) {
            // TODO: handle exception
            Log.e("cmcc_pay异常捕捉", "异常："+e.toString());
        }
    }

5.重点就是上面 invokeContainsInterfaceStaticMethod 方法的实现

    /**
         * 执行包含接口的静态方法
         * @param   className       类名
         * @param   methodName      方法名
         * @param   oArray          具体参数
         * @param   paramTypeArray      构造参数类型
         * @param   interfaceName   接口名
         * @author liudb
         * */
        public Object invokeContainsInterfaceStaticMethod(String className, String methodName,
                Object[] oArray,Class<?> [] paramTypeArray,String interfaceName,CarrotPaySdkFinal payType) throws Exception {
            Class<?> ownerClass = Class.forName(className);  

            Class<?>[] argsClass = new Class[oArray.length];
            Method [] ms = ownerClass.getDeclaredMethods();
            for (int i = 0, j = oArray.length; i < j; i++) {
                argsClass[i] = oArray[i].getClass();
            }
            Method method = findMethod(ms, methodName, paramTypeArray, interfaceName);
            Class<?> clazz = Class.forName(othre_callBack.getName());
            //因为接口的最后一个参数是回调函数，所以要设置监测回调
            oArray[oArray.length -1] = Proxy.newProxyInstance(
                    clazz.getClassLoader(),
                    new Class[]{clazz},
                    new CarrotPayCallbackMethodInterceptor(payType));
            othre_callBack = null;
            return method.invoke(ownerClass, oArray);
        }  

6.还有如何捕获回调的接口返回的参数 CarrotPayCallbackMethodInterceptor 类的实现

    public class CarrotPayCallbackMethodInterceptor implements InvocationHandler {
        CarrotPaySdkFinal csf;
        public CarrotPayCallbackMethodInterceptor (CarrotPaySdkFinal paytype){
            csf = paytype;
        }
        @Override
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
            // TODO Auto-generated method stub
            switch (csf) {
            case CMCC_PAY:
                    //在这里获得回调函数返回的参数，通过自定义carrotSdkHelper发送给callback处理返回结果
                              for(int j = 0; j < args.length;j++){
                    if(args[j].getClass().getName().equalsIgnoreCase("java.lang.Integer")){
                        Integer result = (Integer)args[j];
                        switch (result) {
                        case 1:
                            Message msg_cmcc_success = new Message();
                            msg_cmcc_success.what = CarrotPaySDK.CARROT_PAY_SUCCESS;
                            CarrotPaySDK.carrotSdkHleper.cmcc_PayendHandler.sendMessage(msg_cmcc_success);
                            break;
                        case 2:
                            Message msg_cmcc_faild = new Message();
                            msg_cmcc_faild.what = CarrotPaySDK.CARROT_PAY_FAILD;
                            CarrotPaySDK.carrotSdkHleper.cmcc_PayendHandler.sendMessage(msg_cmcc_faild);
                            break;
                        default:
                            Message msg_cmcc_faild2 = new Message();
                            msg_cmcc_faild2.what = CarrotPaySDK.CARROT_PAY_FAILD;
                            CarrotPaySDK.carrotSdkHleper.cmcc_PayendHandler.sendMessage(msg_cmcc_faild2);
                            break;
                        }
                    }
                }
                break;
            case OTHER_PAY:
                Log.e("___________OTHER_______________", "____________________"+method.getName());  

                for(int j = 0; j < args.length;j++){
                    Log.e("___________OTHER_______________"+args[j].getClass().getName(), "____________________"+args[j].toString());  

                }
                Log.e("___________OTHER_______________", "______333333______________");
                break;
            default:
                break;
            }  

            return null;
        }  

    }  

7.（1）callback 类的介绍

    public interface CarrotPayCallBack {
            public void onPayEnd(int isSuccess);
        }   

（2）具体实现新建一个CarrotPayCallBack，传到4步骤的方法里

    new CarrotPayCallBack() {  

                    @Override
                    public void onPayEnd(int isSuccess) {
                        // TODO Auto-generated method stub
                        switch (isSuccess) {
                        case CarrotPaySDK.CARROT_PAY_SUCCESS:
                            Toast.makeText(getApplicationContext(), "支付成功", Toast.LENGTH_SHORT).show();
                            break;
                        case CarrotPaySDK.CARROT_PAY_CANCEL:
                            Toast.makeText(getApplicationContext(), "支付取消", Toast.LENGTH_SHORT).show();
                            break;
                        case CarrotPaySDK.CARROT_PAY_FAILD:
                            Toast.makeText(getApplicationContext(), "支付失败", Toast.LENGTH_SHORT).show();
                            break;
                        case CarrotPaySDK.CARROT_PAY_UNKNOW:
                            Toast.makeText(getApplicationContext(), "未知错误", Toast.LENGTH_SHORT).show();
                            break;
                        default:
                            break;
                        }
                    }
                }  

8.代码已经提交到github，如有需要请移驾 https://github.com/liudb5/MyTestPay

9.已经在CSDN发过这个 http://blog.csdn.net/liudb5/article/details/49739873