Json-RPC Method from iOS to Android

I have a java webservice, with some method.

The webservice methods are in this form:

@Webservice(paramNames = {"email", "password", "stayLogged", "idClient"},

public Response startSession(String email, String password, Boolean stayLogged, String idClient) throws Exception {

    boolean rC = stayLogged != null && stayLogged.booleanValue();

    UserService us = new UserService();

    User u = us.getUsersernamePassword(email, password);

    if (u == null || u.getActive() != null && !u.getActive().booleanValue()) {

        return ErrorResponse.getAccessDenied(id, logger);

    }

    InfoSession is = null;

    String newKey = null;

    while (newKey == null) {

        newKey = UserService.md5(Math.random() + " " + new Date().getTime());

        if (SessionManager.get(newKey) != null) {

            newKey = null;

        } else {

            is = new InfoSession(u, rC, newKey);

            if (idClient != null && idClient.toUpperCase().equals("ANDROID")) {

                is.setClient("ANDROID");

            }

            SessionManager.add(newKey, is);

        }

    }

    logger.log(Level.INFO, "New session started: " + newKey + " - User: " + u.getEmail());

    return new Response(new InfoSessionJson(newKey, is), null, id);

}

The webservice can receive json-rpc calls, and the client-side code that can invoke the methods of the webservice, in iOS has this form:

-(void)asynchronousRPCWithMethod:(NSString *)method andParams:(NSArray *)params{



    NSLog(@"REMOTE PROCEDURE CALL ON %@", method);

    self.rpcMethod = method;



    NSMutableString *requestString = [[NSMutableString alloc] init];



    //setting method

    [requestString appendFormat:@"{\"method\":\"%@\"", method];



    //setting params

    [requestString appendString:@", \"params\":["];



    int max = [params count];

    int c = 0;



    for (NSString *str in params){

        c++; 

        [requestString appendFormat:@"\"%@\"", str];

        if (c==max){



        }

        else{

            [requestString appendString:@", "];

        }

    }



    [requestString appendFormat:@"], \"id\":1}"];



    NSLog(@"Request:\n%@", requestString);



    NSData *requestData = [NSData dataWithBytes:[requestString UTF8String] length:[requestString length]];



    [requestString release];



    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:WEBSITELINK]] autorelease];



    [request setHTTPMethod:@"POST"];

    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

    [request setHTTPBody:requestData];



    NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:NO];

    [conn scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];

    [conn start];



    UIApplication *app = [UIApplication sharedApplication];

    app.networkActivityIndicatorVisible = YES;



    if (conn) {

        NSMutableData *data = [[NSMutableData alloc] init];

        self.receivedData = data;

        [data release];

    }

    else {

        NSError *error = [NSError errorWithDomain:RPCErrorDomain

                                             code:RPCErrorNoConnection

                                         userInfo:nil];

        NSLog(@"*** error ***\n%@", error);

        /**

         * SENT A MESSAGE WITH A ERROR

         */

        if ([self.delegate respondsToSelector:@selector(rpcDidFailWithError:)])

            [delegate rpcDidFailWithError:error];



    }



}

How can I implement the same client side method on Android???