【发布时间】：2014-05-08 13:35:04
【问题描述】：
我正在尝试调用 asp.net Web 服务的 add 方法，该方法将两个整数作为参数并返回它们的总和。 Web 服务已部署并在本地 IIS 服务器中运行。
但是在 android 模拟器中执行 apk 时出现以下错误。
05-08 18:14:53.668：E/AndroidRuntime(662)：致命异常：Thread-81
05-08 18:14:53.668: E/AndroidRuntime(662): java.lang.NoClassDefFoundError: org.ksoap2.serialization.SoapObject
05-08 18:14:53.668: E/AndroidRuntime(662): at com.example.adddemo.CallSoap.Add(CallSoap.java:23)
05-08 18:14:53.668: E/AndroidRuntime(662): at com.example.adddemo.Caller.run(Caller.java:14)
我在这里缺少什么？我已经导入了 ksoap2 库。如果我在发送请求时遗漏了任何需要额外添加的内容，或者我的本地 IIS 有任何问题，请告诉我。
我的完整代码如下：
activity_main.xml 有两个编辑文本和一个按钮。单击按钮时，应调用 ActivityMain.java 中的方法。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.adddemo.MainActivity$PlaceholderFragment" >
<EditText
android:id="@+id/textParam1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:hint="@string/param1"/>
<EditText
android:id="@+id/textParam2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@id/textParam1"
android:layout_below="@id/textParam1"
android:layout_marginTop="27dp"
android:hint="@string/param2"/>
<Button
android:id="@+id/btnAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textParam2"
android:layout_below="@+id/textParam2"
android:layout_marginLeft="89dp"
android:layout_marginTop="46dp"
android:text="@string/Button"
android:onClick="onClick" />
</RelativeLayout>
ActivityMain.java 代码如下：
package com.example.adddemo;
import android.app.AlertDialog;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity
{
public static String rslt = "";
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn = (Button)findViewById(R.id.btnAdd);
}
public void onClick(View view)
{
final AlertDialog ad=new AlertDialog.Builder(this).create();
try
{
EditText ed1=(EditText)findViewById(R.id.textParam1);
EditText ed2=(EditText)findViewById(R.id.textParam2);
int value1=Integer.parseInt(ed1.getText().toString());
int value2=Integer.parseInt(ed2.getText().toString());
rslt="START";
Caller call = new Caller();
call.param1=value1;
call.param2=value2;
//call.ad=ad;
call.join();
call.start();
while(rslt=="START")
{
try
{
Thread.sleep(10);
}
catch(Exception ex)
{
rslt = ex.getMessage();
}
}
ad.setTitle("RESULT OF ADD of "+value1+" and "+value2);
ad.setMessage(rslt);
}
catch(Exception ex)
{
ad.setTitle("Error!"); ad.setMessage(ex.toString());
}
ad.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Caller.java 类代码如下：
它将调用 CallSoap 类，该类将负责调用 asp.net 网络服务
package com.example.adddemo;
public class Caller extends Thread
{
public CallSoap cs;
public int param1, param2;
public void run()
{
try
{
cs = new CallSoap();
String resp=cs.Add(param1, param2);
MainActivity.rslt = resp;
}
catch(Exception ex)
{
MainActivity.rslt=ex.toString();
}
}
}
CallSoap 类代码如下 它将处理创建http请求，将数据绑定到soap信封中并使用http请求传递它
package com.example.adddemo;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
public class CallSoap
{
public final String SOAP_ACTION = "http://tempuri.org/Add";
public final String OPERATION_NAME = "Add";
public final String WSDL_TARGET_NAMESPACE = "http://tempuri.org/";
public final String SOAP_ADDRESS = "http://192.168.8.1/AddDemo.asmx";
//where 192.168.8.1 is my system ip
//AddDemo.asmx is my webservice
public CallSoap()
{
}
public String Add(int param1, int param2)
{
SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE,OPERATION_NAME);
PropertyInfo pi=new PropertyInfo();
pi.setName("param1");
pi.setValue(param1);
pi.setType(Integer.class);
request.addProperty(pi);
pi=new PropertyInfo();
pi.setName("param2");
pi.setValue(param2);
pi.setType(Integer.class);
request.addProperty(pi);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);
Object response=null;
try
{
httpTransport.call(SOAP_ACTION, envelope);
response = envelope.getResponse();
}
catch (Exception exception)
{
response=exception.toString();
}
return response.toString();
}
}
【问题讨论】：
标签： android asp.net web-services