Android基于SOAP协议向WebService交互数据,修改请求超时时间

博客已经放置好长一段时间了,这段时间一直忙于毕业论文,所以… 哎,不能老给自己找借口滴!

SOAP:简单对象访问协议,简单对象访问协议(SOAP)是一种轻量的、简单的、基于 XML 的协议。

通过第三方提供的架包ksoap2-android-assembly-2.4-jar-with-dependencies.jar,我们可以向服务器进行请求调用自己需要的服务。下面以http://www.webxml.com.cn/提供的天气预报web服务为例。

下面是向远处服务器进行请求的详细操作类WebServiceUtil

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();
            for (int i = 0; i < count; i++) {
                allProvince.add(result.getProperty(i).toString());
            }
 
 
        } catch (IOException e) {
            e.printStackTrace();
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        }
        return allProvince;
    }
}
<style type="text/css"> <!-- .csharpcode, .csharpcode pre {font-size:small; color:black; font-family:consolas,"Courier New",courier,monospace; background-color:#ffffff} .csharpcode pre {margin:0em} .csharpcode .rem {color:#008000} .csharpcode .kwrd {color:#0000ff} .csharpcode .str {color:#006080} .csharpcode .op {color:#0000c0} .csharpcode .preproc {color:#cc6633} .csharpcode .asp {background-color:#ffff00} .csharpcode .html {color:#800000} .csharpcode .attr {color:#ff0000} .csharpcode .alt {background-color:#f4f4f4; width:100%; margin:0em} .csharpcode .lnum {color:#606060} --> </style>

使用还是比较简单的,在这我只以天气预报服务中提供的获取省份信息的方法getSupportProvince为例,详细的解释了基于soap协议的访问操作。

在访问远程服务器提供的服务时,有时会因为网络问题或者是服务器端问题,而导致客户端侧一直处于请求连接状态,此时我们希望可以控制请求得不到响应的超时时间TimeOut.

想要控制请求的超时时间,我们需要根据ksoap2-android-assembly-2.4-jar-with-dependencies.jar包,修改一些访问的控制类。

1.首先重写架包中的ServiceConnectionSE.java,添加设置超时时间的方法,可以在你的工程里重写这个类

package com.ahutzh.weather;
 
 
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
 
 
import org.ksoap2.transport.ServiceConnection;
 
 
public class ServiceConnectionSE
  implements ServiceConnection
{
  private HttpURLConnection connection;
 
 
  public ServiceConnectionSE(String url)
    throws IOException
  {
    this.connection = ((HttpURLConnection)new URL(url).openConnection());
    this.connection.setUseCaches(false);
    this.connection.setDoOutput(true);
    this.connection.setDoInput(true);
  }
 
 
  public void connect() throws IOException {
    this.connection.connect();
  }
 
 
  public void disconnect() {
    this.connection.disconnect();
  }
 
 
  public void setRequestProperty(String string, String soapAction) {
    this.connection.setRequestProperty(string, soapAction);
  }
 
 
  public void setRequestMethod(String requestMethod) throws IOException {
    this.connection.setRequestMethod(requestMethod);
  }
 
 
  public OutputStream openOutputStream() throws IOException {
    return this.connection.getOutputStream();
  }
 
 
  public InputStream openInputStream() throws IOException {
    return this.connection.getInputStream();
  }
 
 
  public InputStream getErrorStream() {
    return this.connection.getErrorStream();
  }
  
  //设置连接服务器的超时时间,毫秒级,此为自己添加的方法
  public void setConnectionTimeOut(int timeout){
      this.connection.setConnectTimeout(timeout);
  }
}
<style type="text/css"> <!-- .csharpcode, .csharpcode pre {font-size:small; color:black; font-family:consolas,"Courier New",courier,monospace; background-color:#ffffff} .csharpcode pre {margin:0em} .csharpcode .rem {color:#008000} .csharpcode .kwrd {color:#0000ff} .csharpcode .str {color:#006080} .csharpcode .op {color:#0000c0} .csharpcode .preproc {color:#cc6633} .csharpcode .asp {background-color:#ffff00} .csharpcode .html {color:#800000} .csharpcode .attr {color:#ff0000} .csharpcode .alt {background-color:#f4f4f4; width:100%; margin:0em} .csharpcode .lnum {color:#606060} --> </style>

再自己写一个传输对象类,类似于架包中的AndroidHttpTransport类,命名为MyAndroidHttpTransport.java

package com.ahutzh.weather;
 
 
import java.io.IOException;
 
 
import org.ksoap2.transport.HttpTransportSE;
import org.ksoap2.transport.ServiceConnection;
 
 
public class MyAndroidHttpTransport extends HttpTransportSE {
 
 
    private int timeout = 30000; //默认超时时间为30s
    
    public MyAndroidHttpTransport(String url) {
        super(url);
    }
    
    public MyAndroidHttpTransport(String url, int timeout) {
        super(url);
        this.timeout = timeout;
    }
 
 
    protected ServiceConnection getServiceConnection(String url) throws IOException {
        ServiceConnectionSE serviceConnection = new ServiceConnectionSE(url);
        serviceConnection.setConnectionTimeOut(timeout);
        return new ServiceConnectionSE(url);
    }
}
 
 
完成这之后,在前面的第四步构建传输对象中,就不要使用架包中的AndroidHttpTransport,而使用我们自己的写的这个类。
//4.构建传输对象
//            AndroidHttpTransport transport = new AndroidHttpTransport(URL);
//            transport.debug = true;
            int timeout = 15000;  //set timeout 15s
            MyAndroidHttpTransport transport = new MyAndroidHttpTransport(URL, timeout);
            transport.debug = true;
 
 
ok了~  今天就到这里吧,还要去完成我的毕业论文额!
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