Android无法序列化错误

Question

我正在开发一个使用 android 调用 Web 服务的项目。我为此使用ksoap2。 我创建了一个我自己的数据类型（只是为了尝试），其中包含两个字符串变量。是这样的

public class MyType {
    String fName;
    String lName;

    public MyType(String s1,String s2){
        fName = s1;
        lName = s2;
    }
}

我在两端创建了这种数据类型。（Web 服务端和 android 应用程序端）。我编写了一个程序来调用 Web 服务，然后使用我的数据类型连接给定的字符串。

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import java.io.IOException;

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 org.xmlpull.v1.XmlPullParserException;

import android.os.AsyncTask;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    public final static String URL = "http://192.168.69.1:8080/WebApplication4/MyWebService?wsdl";
    public static final String NAMESPACE = "http://mywebservice.android.com/";
    public static final String SOAP_ACTION_PREFIX = "/";
    private static final String METHOD = "objectMethod";
    private TextView textView;

    MyType mt = new MyType("Upul","Tharanga");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = (TextView) findViewById(R.id.test);
        AsyncTaskRunner runner = new AsyncTaskRunner(mt);
        runner.execute();
    }

    private class AsyncTaskRunner extends AsyncTask<Integer, String, String> {

        private String resp;
        MyType a;

        public AsyncTaskRunner(MyType a){
            this.a = a;
        }

        @Override
        protected String doInBackground(Integer... params) {
            publishProgress("Loading contents..."); // Calls onProgressUpdate()
            try {
                // SoapEnvelop.VER11 is SOAP Version 1.1 constant
                SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
                SoapObject request = new SoapObject(NAMESPACE, METHOD);

                PropertyInfo pi1=new PropertyInfo();
                pi1.setType(String.class);
                pi1.setName("parameter");
                pi1.setValue(a);
                request.addProperty(pi1);

                envelope.bodyOut = request;
                HttpTransportSE transport = new HttpTransportSE(URL);
                try {
                    transport.call(NAMESPACE + SOAP_ACTION_PREFIX + METHOD, envelope);
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (XmlPullParserException e) {
                    e.printStackTrace();
                }
                //bodyIn is the body object received with this envelope
                if (envelope.bodyIn != null) {
                    //getProperty() Returns a specific property at a certain index.
                    //SoapPrimitive resultSOAP = (SoapPrimitive) ((SoapObject) envelope.bodyIn).getProperty(0);
                    //Object resultSOAP = (SoapPrimitive)((SoapObject) envelope.bodyIn).getProperty(0);
                    Object resultSOAP = (SoapPrimitive)((SoapObject) envelope.bodyIn).getProperty(0);
                    resp=resultSOAP.toString();
                }
            } catch (Exception e) {
                e.printStackTrace();
                resp = e.getMessage();
            }
            return resp;
        }

        /**
         * 
         * @see android.os.AsyncTask#onPostExecute(java.lang.Object)
         */
        @Override
        protected void onPostExecute(String result) {
            // execution of result of Long time consuming operation
            // In this example it is the return value from the web service
            textView.setText(result);
        }

        /**
         * 
         * @see android.os.AsyncTask#onPreExecute()
         */
        @Override
        protected void onPreExecute() {
            // Things to be done before execution of long running operation. For
            // example showing ProgessDialog
        }
        /**
         * 
         * @see android.os.AsyncTask#onProgressUpdate(Progress[])
         */
        @Override
        protected void onProgressUpdate(String... text) {
            textView.setText(text[0]);
            // Things to be done while execution of long running operation is in
            // progress. For example updating ProgessDialog
        }
    }


}

我的 Web 服务所做的是将 MyType 参数作为输入并将这两个给定字符串连接起来并返回连接后的字符串。 当我运行 android 应用程序时，我收到一个错误（我认为是运行时错误）说 cannot serialize MyType. 有什么建议可以解决这个问题吗？

Answer 1

尝试实现Serializable

public class MyType implements Serializable {
    String fName;
    String lName;

    public MyType(String s1,String s2){
        fName = s1;
        lName = s2;
    }
}