Question

使用soap访问服务器，为什么获取到服务器的响应数据为null

Answer 1

下面是向远处服务器进行请求的详细操作类WebServiceUtil

Java代码
public class WebServiceUtil {

//命名空间
private static final String NAMESPACE = "http://WebXml.com.cn/";
//WebService地址
private static final String URL = "http://webservice.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl";
//需要调用的方法名
private static final String getSupportProvince = "getSupportProvince";

/**
* @desc 获得洲、国内外省份和城市信息
* @return 省份列表
*/
public List getAllProvince() {
List allProvince = new ArrayList();

try {
//1.实例化SoapObject对象
SoapObject request = new SoapObject(NAMESPACE, getSupportProvince);

//2.如果方法需要参数，设置参数
//request.setProperty("参数名称", "参数值");

//3.设置Soap的请求信息,参数部分为Soap协议的版本号
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.bodyOut = request;

//4.构建传输对象
AndroidHttpTransport transport = new AndroidHttpTransport(URL);
transport.debug = true;

//5.访问WebService,第一个参数为命名空间 + 方法名,第二个参数为Envelope对象
transport.call(NAMESPACE + getSupportProvince, envelope);

//6.解析返回的数据
SoapObject result = (SoapObject) envelope.getResponse();
int count = result.getPropertyCount();