当我运行AndroidWSClient时，只有运行main.xml文件但未与webservice wsdl文件连接而不生成输出时，不会生成数据。我该怎么办？
Hello.java：
package org.webapp.ws;
public class Hello {
public String sayHello()
{
return "Hello ";
}
}
Wsdl档案---
<?xml version="1.0" encoding="UTF-8"?>
-<wsdl:definitions targetNamespace="http://ws.webapp.org" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:ns="http://ws.webapp.org" xmlns:ns1="http://org.apache.axis2/xsd" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"> <wsdl:documentation> Please Type your service description here </wsdl:documentation>
-<wsdl:types> -<xs:schema targetNamespace="http://ws.webapp.org" elementFormDefault="qualified" attributeFormDefault="qualified">
-<xs:element name="sayHello">
-<xs:complexType> <xs:sequence/> </xs:complexType> </xs:element> -<xs:element name="sayHelloResponse"> -<xs:complexType> -<xs:sequence> <xs:element name="return" type="xs:string" nillable="true" minOccurs="0"/> </xs:sequence> </xs:complexType> </xs:element> </xs:schema> </wsdl:types>
-<wsdl:message name="sayHelloRequest"> <wsdl:part name="parameters" element="ns:sayHello"/> </wsdl:message>
-<wsdl:message name="sayHelloResponse"> <wsdl:part name="parameters" element="ns:sayHelloResponse"/> </wsdl:message>
-<wsdl:portType name="HelloPortType">
-<wsdl:operation name="sayHello"> <wsdl:input wsaw:Action="urn:sayHello" message="ns:sayHelloRequest"/> <wsdl:output wsaw:Action="urn:sayHelloResponse" message="ns:sayHelloResponse"/> </wsdl:operation> </wsdl:portType>
-<wsdl:binding name="HelloSoap11Binding" type="ns:HelloPortType"> <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/> -<wsdl:operation name="sayHello"> <soap:operation style="document" soapAction="urn:sayHello"/>
-<wsdl:input> <soap:body use="literal"/> </wsdl:input>
-<wsdl:output> <soap:body use="literal"/> </wsdl:output> </wsdl:operation> </wsdl:binding> -<wsdl:binding name="HelloSoap12Binding" type="ns:HelloPortType"> <soap12:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
-<wsdl:operation name="sayHello"> <soap12:operation style="document" soapAction="urn:sayHello"/> -<wsdl:input> <soap12:body use="literal"/> </wsdl:input>
-<wsdl:output> <soap12:body use="literal"/> </wsdl:output> </wsdl:operation> </wsdl:binding> -<wsdl:binding name="HelloHttpBinding" type="ns:HelloPortType"> <http:binding verb="POST"/> -<wsdl:operation name="sayHello"> <http:operation location="sayHello"/>
-<wsdl:input> <mime:content type="application/xml" part="parameters"/> </wsdl:input> -<wsdl:output> <mime:content type="application/xml" part="parameters"/> </wsdl:output> </wsdl:operation> </wsdl:binding>
-<wsdl:service name="Hello">
-<wsdl:port name="HelloHttpSoap11Endpoint" binding="ns:HelloSoap11Binding">
<soap:address location="http://localhost:8080/WebApp/services/Hello.HelloHttpSoap11Endpoint/"/> </wsdl:port>
-<wsdl:port name="HelloHttpSoap12Endpoint" binding="ns:HelloSoap12Binding"> <soap12:address location="http://localhost:8080/WebApp/services Hello.HelloHttpSoap12Endpoint/"/> </wsdl:port>
-<wsdl:port name="HelloHttpEndpoint" binding="ns:HelloHttpBinding">
<http:address location="http://localhost:8080/WebApp/services/Hello.HelloHttpEndpoint/"/> </wsdl:port> </wsdl:service> </wsdl:definitions>
AndroidWSClientActivity.java：
package com.android.ws;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapPrimitive;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.os.Bundle;
public class AndroidWSClientActivity extends Activity {
private static final String SOAP_ACTION = "http://ws.webapp.org/sayHello";
private static final String METHOD_NAME = "sayHello";
private static final String NAMESPACE ="http://ws.webapp.org";
private static final String URL ="http://10.0.2.2:8080/WebApp/services/Hello?wsdl";
private String Webresponse;
private View handler;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webAccess();
}
public void webAccess(){
thread = new Thread(){
public void run(){
try{
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION, envelope);
SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
Webresponse = response.toString();
Toast.makeText(getApplicationContext(), " "+Webresponse, Toast.LENGTH_LONG).show();
}
catch(Exception e){
e.printStackTrace();
}
handler.post(createUI);
}
};
thread.start();
}
final Runnable createUI = new Runnable() {
private TextView textView;
public void run(){
textView.setText(Webresponse);
}
};
}
and in **main.xml**
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="hello1"/>
我下载了ksoap并将其添加到项目中。 Web服务器运行成功，android项目也运行，但是wsdl返回了值。 Wsdl文件在localhost上，所以10.0.2.2使用了，而且我也做了干净的项目。但没有给定输出。
我使用了minsdkversion-8和targetsdkversion-17。是否必须sdkversion是“17”？ 在Hello.java文件中，我只返回了hello字符串。在这里，Webapp和AndroidWsClient都是不同的项目。
错误是 handler.post（createUI）; 的Nullpointer异常 AndroidWSClient.java页面中的行。