พอดีผมจะใช้ Android ส่ง JSON หรือ List เป็น Parameter ในการส่งข้อมูลไปที่ Web Services

public void invokeJSONWSSentEmp(List<String> empId, String methodName) {
		
		ArrayList<JSONObject> MyArrJson = new ArrayList<JSONObject>();
		JSONObject object;
		
		/*** Add ***/
		for(int i=0 ; i<empId.size() ;i++) {
			object = new JSONObject();
			try {
				object.put("empId", empId.get(i).toString());
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			MyArrJson.add(object);			
		}
		JSONArray json = new JSONArray(MyArrJson);
		
		SoapObject request = new SoapObject(NAMESPACE, methodName);
		PropertyInfo paramPI = new PropertyInfo();
		paramPI.setName("emp");
		paramPI.setValue(json);
		paramPI.setType(json.getClass());
		request.addProperty(paramPI);
		SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
				SoapEnvelope.VER11);
		envelope.dotNet = true;
		envelope.setOutputSoapObject(request);
		HttpsTransportSE androidHttpTransport = new HttpsTransportSE(URL, 443, "/vehicle.asmx?WSDL", 5000);
		androidHttpTransport.debug = true;
		try {
			androidHttpTransport.call(SOAP_ACTION+methodName, envelope);
			Log.d(TAG,"Come in try");
			SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
			responseJSON = response.toString();
			Log.d(TAG,""+responseJSON);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}