Android开发学习笔记十五 webservice工具类

来源：互联网发布：淘宝运营报价编辑：程序博客网时间：2024/06/07 05:15

上一章说的webservice访问封装成WebServiceUtils

代码思路:

工具类中的静态方法callWebService(String url, final String methodName,Map<String, String> properties,final WebServiceCallBack webServiceCallBack)就可以来获取我们想要的数据，现在讲解下里面的实现思路

方法说明:url为webservice服务端地址,methodName为方法名，properties为方法参数，有则遍历添加，webServiceCallBack为回调接口
使用了线程池来异步操作调用WebService接口，我们在线程中调用HttpTransportsSE对象的call(String soapAction, SoapEnvelope envelope)方法就能实现对WebService的调用，并且通过soapEnvelope.bodyIn获取WebService返回的信息
返回的信息是在子线程中，我们需要利用Handler来实现子线程与主线程进行转换，然后在Handler的handleMessage(Message msg)中将结果回调到接口webServiceCallBack.callBack的参数中

代码片段：

声明线程池

private static final ExecutorService executorService = Executors.newFixedThreadPool(3);

静态访问方法

    public static void callWebService(String url, final String methodName,                                      Map<String, String> properties,final WebServiceCallBack webServiceCallBack) {        //创建httpTransportSE传输对象        final HttpTransportSE ht = new HttpTransportSE(url);        ht.debug = true;        //使用soap1.1协议创建Envelop对象        final SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);        //实例化SoapObject对象        final SoapObject request = new SoapObject(Constant.SERVICE_NS, methodName);        /**         * 方法参数添加         * */        if (properties != null) {            for (Iterator<Map.Entry<String, String>> it = properties.entrySet()                    .iterator(); it.hasNext();) {                Map.Entry<String, String> entry = it.next();                request.addProperty(entry.getKey(), entry.getValue());            }        }//        request.addProperty(methodName,properties);        //将SoapObject对象设置为SoapSerializationEnvelope对象的传出SOAP消息        envelope.bodyOut = request;        // 用于子线程与主线程通信的Handlerfinal Handler mHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);                // 将返回值回调到callBack的参数中webServiceCallBack.callBack((SoapObject) msg.obj);}};        // 开启线程去访问WebServiceexecutorService.submit(new Runnable() {@Overridepublic void run() {                SoapObject resultSoapObject = null;                try{                    //调用webService                    ht.call(null, envelope);                    if(envelope.getResponse() != null){                        resultSoapObject = (SoapObject) envelope.bodyIn;                    }                }catch (Exception e) {                    e.printStackTrace();                }finally {                    // 将获取的消息利用Handler发送到主线程                    mHandler.sendMessage(mHandler.obtainMessage(0,                            resultSoapObject));                }}});}

回调接口

public interface WebServiceCallBack {public void callBack(SoapObject result);}

代码测试使用

                WebServiceUtils.callWebService(Constant.WEBSERVICE_URL, "sayHello", maps, new WebServiceUtils.WebServiceCallBack() {                    //WebService接口返回的数据回调到这个方法中                    @Override                    public void callBack(SoapObject result) {                        if(result != null){                            String name = result.getProperty(0).toString();                            System.out.println("==========================主线程返回值"+name);//                            provinceList = parseSoapObject(result);//                            mProvinceList.setAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, provinceList));                        }else{                            System.out.println("==========================主线程无返回");//                            Toast.makeText(MainActivity.this, "获取WebService数据错误", Toast.LENGTH_SHORT).show();                        }                    }                });

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