android系统中使用ksoap2-android客户端库操作Asp.net WebService
在java中使用的PC版WebService客户端库非常丰富,例如,Axis2、CXF等,但这些开发包对于android来说过于庞大,也未必很容易移植到android上。适合手机的WebService客户端SDK也有一些。本例使用了比较常用的KSOAP2。读者可以从如下的地址下载Android版的KSOAP2。
http://code.google.com/p/ksoap2-android/wiki/HowToUse?tm=2
将下载下来的包引用到android项目后就可以使用了,在引用jar包后可能会抛出警告"warning: Ignoring InnerClasses attribute for an anonymous inner class that doesn't come with an associated EnclosingMethod attribute. (This class was probably produced by a broken compiler.)”,在网上搜索了一下,这可能是因为版本的问题,但是不影响使用。好了废话不多说,直接上代码。
服务器端的webservice文件Demo.asmx
<%@ WebService Language="C#" Class="Demo" %> using System; using System.Web; using System.Web.Services; using System.Web.Services.Protocols; [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] //若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务,请取消对下行的注释。 // [System.Web.Script.Services.ScriptService] public class Demo : System.Web.Services.WebService { [WebMethod] public string HelloWorld() { return "Hello World"; } [WebMethod] public string Add(int x, int y) { int z = x + y; return z.ToString(); } }
下面就是我测试用的手机端的代码了,首先来看我们的xml布局文件 demo.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <TextView android:id="@+id/tv" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="10dip"> </TextView> </LinearLayout>
Demo.java,在下面的代码中,如果你的WebService方法没有参数,可以把step2省略掉。
package com.studio.basf.android; import org.ksoap2.SoapEnvelope; import org.ksoap2.serialization.SoapObject; import org.ksoap2.serialization.SoapPrimitive; import org.ksoap2.serialization.SoapSerializationEnvelope; import org.ksoap2.transport.HttpTransportSE; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class Demo extends Activity { private String NameSpace = "http://tempuri.org/"; private String MethodName = "Add"; private String url = "http://192.168.1.93/services/Demo.asmx"; private String soapAction = NameSpace + MethodName; private TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.demo); tv = (TextView) findViewById(R.id.tv); tv.setText(ws()); } public String ws() { String result = ""; try { //step1 指定WebService的命名空间和调用的方法名 SoapObject request = new SoapObject(NameSpace, MethodName); //step2 设置调用方法的参数值,这里的参数名称最好和WebService一致 request.addProperty("x", 5); request.addProperty("y", 6); //step3 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本 SoapSerializationEnvelope envelope = new SoapSerializationEnvelope( SoapEnvelope.VER11); //设置是否调用的是dotNet下的WebService envelope.dotNet = true; //必须,等价于envelope.bodyOut = request; envelope.setOutputSoapObject(request); //step4 创建HttpTransportSE对象 HttpTransportSE ht = new HttpTransportSE(url); //step5 调用WebService ht.call(soapAction, envelope); //step6 使用getResponse方法获得WebService方法的返回结果 if(envelope.getResponse()!=null){ SoapPrimitive response = (SoapPrimitive) envelope.getResponse(); result = response.toString(); } } catch (Exception e) { result = e.getMessage(); } return result; } }
运行结果如下