尝试在Android上运行SOAP客户端应用程序时，doInBackground（）中的RuntimeException

Question

我正在用计算器的Java开发SOAP应用程序，我想从正在开发的Android应用程序中使用它，问题是它会产生以下错误：

E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
    Process: com.example.calculadora, PID: 23487
    java.lang.RuntimeException: An error occurred while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:353)
        at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
        at java.util.concurrent.FutureTask.run(FutureTask.java:271)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.lang.RuntimeException: Cannot serialize: 2.5
        at org.ksoap2.serialization.SoapSerializationEnvelope.writeElement(SoapSerializationEnvelope.java:629)
        at org.ksoap2.serialization.SoapSerializationEnvelope.writeProperty(SoapSerializationEnvelope.java:613)
        at org.ksoap2.serialization.SoapSerializationEnvelope.writeObjectBody(SoapSerializationEnvelope.java:582)
        at org.ksoap2.serialization.SoapSerializationEnvelope.writeObjectBody(SoapSerializationEnvelope.java:566)
        at org.ksoap2.serialization.SoapSerializationEnvelope.writeElement(SoapSerializationEnvelope.java:623)
        at org.ksoap2.serialization.SoapSerializationEnvelope.writeBody(SoapSerializationEnvelope.java:547)
        at org.ksoap2.SoapEnvelope.write(SoapEnvelope.java:192)
        at org.ksoap2.transport.Transport.createRequestData(Transport.java:74)
        at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:58)
        at com.example.calculadora.CallAsynchronousWS.callActionWS(CallAsynchronousWS.java:63)
        at com.example.calculadora.CallAsynchronousWS.doInBackground(CallAsynchronousWS.java:34)
        at com.example.calculadora.CallAsynchronousWS.doInBackground(CallAsynchronousWS.java:17)
        at android.os.AsyncTask$2.call(AsyncTask.java:333)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
        at java.lang.Thread.run(Thread.java:764) 

基本上，我正在做的是通过按应用程序按钮，实例化InitialOperarListener类，这将调用在SOAP应用程序和Android应用程序之间实现连接的类。

MainActivity代码如下：

public class MainActivity extends AppCompatActivity {

    private EditText numero1;
    private EditText numero2;

    private TextView resultado;

    private Button operar;
    private Spinner operaciones;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        numero1 = (EditText) this.findViewById(R.id.textBox);
        numero2 = (EditText) this.findViewById(R.id.textBox2);

        resultado = (TextView) this.findViewById(R.id.textViewResultado);

        operar = (Button) this.findViewById(R.id.button);
        operaciones = (Spinner) this.findViewById(R.id.spinner);
        String[] op = {"Sumar", "Restar", "Multiplicar", "Dividir", "Potencia", "Raiz", "Seno", "Coseno"};
        operaciones.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, op));
        operar.setOnClickListener(new InitialOperarListener(this));



    }

    public static boolean isOnline(Context context) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
        return networkInfo != null && networkInfo.isAvailable() && networkInfo.isConnected();
    }

    /**
     * @return the numero1
     */
    public EditText getNumero1() {
        return numero1;
    }


    /**
     * @param numero1 the numero1 to set
     */
    public void setNumero1(EditText numero1) {
        this.numero1 = numero1;
    }


    /**
     * @return the numero2
     */
    public EditText getNumero2() {
        return numero2;
    }


    /**
     * @param numero2 the numero2 to set
     */
    public void setNumero2(EditText numero2) {
        this.numero2 = numero2;
    }


    /**
     * @return the resultado
     */
    public TextView getResultado() {
        return resultado;
    }



    /**
     * @param resultado the resultado to set
     */
    public void setResultado(TextView resultado) {
        this.resultado = resultado;
    }

}

这是事件的侦听器。

public class InitialOperarListener implements OnClickListener {



    private MainActivity activity;

    public InitialOperarListener(MainActivity activity) {
        this.activity = activity;
    }

    @Override
    public void onClick(View v) {
        CallAsynchronousWS tarea = new CallAsynchronousWS(activity);
        tarea.execute();
    }

}

这是SOAP连接，使用android的ksoap2库，我要做的是除了操作所需的其他参数之外，还定义了参数：

public class CallAsynchronousWS extends AsyncTask<Double, Void, Void> {

    private static final String NAMESPACE = "http://servicios/";
    private static String URL = "http://192.168.0.19:8080/WebServer/Calculadora?WSDL";
    private static final String METHOD_NAME = "sumar";
    private static final String SOAP_ACTION = "http://servicios/sumar";


    private MainActivity activity;
    private Double response;

    public CallAsynchronousWS(MainActivity activity) {
        this.activity = activity;
    }

    @Override
    protected Void doInBackground(Double... params) {
        callActionWS();
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        activity.getResultado().setText(response.toString());
    }

    @Override
    protected void onPreExecute() {
        activity.getResultado().setText("Calculating...");
    }

    @Override
    protected void onProgressUpdate(Void... values) {
    }

    void callActionWS() {

        SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
        request.addProperty("i", Double.parseDouble(activity.getNumero1().getText().toString()));
        request.addProperty("j", Double.parseDouble(activity.getNumero2().getText().toString()));

        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
        envelope.dotNet = false;
        envelope.setOutputSoapObject(request);
        HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
        try {
            androidHttpTransport.call(SOAP_ACTION, envelope);

            SoapPrimitive response;

            response = (SoapPrimitive) envelope.getResponse();
            this.response = Double.parseDouble(response.toString());
        } catch (SoapFault e) {
            Utilities.messageBox(activity, e.getMessage());
            activity.getResultado().setText("Error: " + e.getMessage());
        } catch (IOException e) {
            Utilities.messageBox(activity, e.getMessage());
            activity.getResultado().setText("Error: " + e.getMessage());
        } catch (XmlPullParserException e) {
            Utilities.messageBox(activity, e.getMessage());
            activity.getResultado().setText("Error: " + e.getMessage());
        }

    }

}

更新：另外，我添加了soap应用程序的WDSL文件，以可视化我在应用程序内部具有的参数。

<!--
 Published by JAX-WS RI (http://jax-ws.java.net). RI's version is Metro/2.3.2-b608 (trunk-7979; 2015-01-21T12:50:19+0000) JAXWS-RI/2.2.11-b150120.1832 JAXWS-API/2.2.12 JAXB-RI/2.2.12-b141219.1637 JAXB-API/2.2.13-b141020.1521 svn-revision#unknown. 
-->
<!--
 Generated by JAX-WS RI (http://jax-ws.java.net). RI's version is Metro/2.3.2-b608 (trunk-7979; 2015-01-21T12:50:19+0000) JAXWS-RI/2.2.11-b150120.1832 JAXWS-API/2.2.12 JAXB-RI/2.2.12-b141219.1637 JAXB-API/2.2.13-b141020.1521 svn-revision#unknown. 
-->
<definitions xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:wsp="http://www.w3.org/ns/ws-policy" xmlns:wsp1_2="http://schemas.xmlsoap.org/ws/2004/09/policy" xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://servicios/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://schemas.xmlsoap.org/wsdl/" targetNamespace="http://servicios/" name="Calculadora">
<types>
<xsd:schema>
<xsd:import namespace="http://servicios/" schemaLocation="http://192.168.0.19:8080/WebServer/Calculadora?xsd=1"/>
</xsd:schema>
</types>
<message name="multiplicar">
<part name="parameters" element="tns:multiplicar"/>
</message>
<message name="multiplicarResponse">
<part name="parameters" element="tns:multiplicarResponse"/>
</message>
<message name="dividir">
<part name="parameters" element="tns:dividir"/>
</message>
<message name="dividirResponse">
<part name="parameters" element="tns:dividirResponse"/>
</message>
<message name="restar">
<part name="parameters" element="tns:restar"/>
</message>
<message name="restarResponse">
<part name="parameters" element="tns:restarResponse"/>
</message>
<message name="sumar">
<part name="parameters" element="tns:sumar"/>
</message>
<message name="sumarResponse">
<part name="parameters" element="tns:sumarResponse"/>
</message>
<message name="hello">
<part name="parameters" element="tns:hello"/>
</message>
<message name="helloResponse">
<part name="parameters" element="tns:helloResponse"/>
</message>
<message name="modulo">
<part name="parameters" element="tns:modulo"/>
</message>
<message name="moduloResponse">
<part name="parameters" element="tns:moduloResponse"/>
</message>
<portType name="Calculadora">
<operation name="multiplicar">
<input wsam:Action="http://servicios/Calculadora/multiplicarRequest" message="tns:multiplicar"/>
<output wsam:Action="http://servicios/Calculadora/multiplicarResponse" message="tns:multiplicarResponse"/>
</operation>
<operation name="dividir">
<input wsam:Action="http://servicios/Calculadora/dividirRequest" message="tns:dividir"/>
<output wsam:Action="http://servicios/Calculadora/dividirResponse" message="tns:dividirResponse"/>
</operation>
<operation name="restar">
<input wsam:Action="http://servicios/Calculadora/restarRequest" message="tns:restar"/>
<output wsam:Action="http://servicios/Calculadora/restarResponse" message="tns:restarResponse"/>
</operation>
<operation name="sumar">
<input wsam:Action="http://servicios/Calculadora/sumarRequest" message="tns:sumar"/>
<output wsam:Action="http://servicios/Calculadora/sumarResponse" message="tns:sumarResponse"/>
</operation>
<operation name="hello">
<input wsam:Action="http://servicios/Calculadora/helloRequest" message="tns:hello"/>
<output wsam:Action="http://servicios/Calculadora/helloResponse" message="tns:helloResponse"/>
</operation>
<operation name="modulo">
<input wsam:Action="http://servicios/Calculadora/moduloRequest" message="tns:modulo"/>
<output wsam:Action="http://servicios/Calculadora/moduloResponse" message="tns:moduloResponse"/>
</operation>
</portType>
<binding name="CalculadoraPortBinding" type="tns:Calculadora">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<operation name="multiplicar">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="dividir">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="restar">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="sumar">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="hello">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="modulo">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
</binding>
<service name="Calculadora">
<port name="CalculadoraPort" binding="tns:CalculadoraPortBinding">
<soap:address location="http://192.168.0.19:8080/WebServer/Calculadora"/>
</port>
</service>
</definitions>

PD：所有方法都返回Double对象，基本操作会收到2个数字，它们是Double数据类型。

谢谢。