programacion - Cómo llamar a un servicio web local desde una aplicación móvil Android

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Question

En los últimos días, he estado trabajando en un código de Android para llamar a un servicio web local. Estoy usando las bibliotecas ksoap para Android para llamar a mi servicio web SOAP creado en .NET. Sin embargo, creo que hay algo mal en mi código, ya que la respuesta que recibo cuando llamo al servicio web desde mi aplicación llega a un bloque catch. Intenté depurar mi código de Android, pero todavía no puedo resolver mi problema. Por favor, ¿alguien me puede decir lo que está mal o alguna otra manera más simple de hacer esto?

Aquí está mi código Android que he implementado hasta ahora:

      package com.demo;
      import java.net.SocketException;
      import org.ksoap2.SoapEnvelope;
      import org.ksoap2.serialization.SoapObject;
      import org.ksoap2.serialization.SoapPrimitive;
      import org.ksoap2.serialization.SoapSerializationEnvelope;
      import org.ksoap2.transport.AndroidHttpTransport;
      import android.app.Activity;
      import android.app.ProgressDialog;
      import android.os.AsyncTask;
      import android.os.Bundle;
      import android.util.Log;
      import android.view.View;
      import android.view.View.OnClickListener;
      import android.widget.Button;
      import android.widget.EditText;

    public class Login extends Activity {
private static final String SOAP_ACTION = "http://tempuri.org/GetLoginDetails";
    private static final String METHOD_NAME = "GetLoginDetails";
    private static final String NAMESPACE = "http://tempuri.org/";
    private static final String URL = "http://10.0.2.2/testlogin/Service1.asmx";

@Override
public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button signin = (Button) findViewById(R.id.regsubmitbtn);

        signin.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {


                        EditText etxt_user = (EditText) findViewById(R.id.usereditlog);
                        user_id = etxt_user.getText().toString();
                        EditText etxt_password = (EditText) findViewById(R.id.pwdeditlog);
                        password = etxt_password.getText().toString();

                        new LoginTask().execute();
                }
        });
}

 String user_id;
String password;
String auth=null;
private class LoginTask extends AsyncTask<Void, Void, Void> {

    private final ProgressDialog dialog = new ProgressDialog(
                    Login.this);

    protected void onPreExecute() {
            this.dialog.setMessage("Logging in...");
            this.dialog.show();
    }

    protected Void doInBackground(final Void... unused) {

             auth = doLogin("lalit", "lalit");
            return null; // don''t interact with the ui!
    }

    protected void onPostExecute(Void result) {
        if (this.dialog.isShowing()) {
            this.dialog.dismiss();
        }

         }


       private String doLogin(String user_id, String password) {

    SoapPrimitive resultstring = null;
    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
    request.addProperty("user", user_id);
    request.addProperty("password", password);
    SoapSerializationEnvelope soapenvelope = new SoapSerializationEnvelope(
                    SoapEnvelope.VER11);
    soapenvelope.dotNet = true;                                                      
    soapenvelope.setOutputSoapObject(request);

    AndroidHttpTransport httptransport = new AndroidHttpTransport(URL);
    httptransport.debug = true;

    try {
            httptransport.call(SOAP_ACTION, soapenvelope);
            resultstring = (SoapPrimitive) soapenvelope.getResponse();
            //Log.d("Authenticaion", resultstring+"");
            System.out.println(resultstring);


    }
    catch (SocketException ex) {
        Log.e("Error : " , "Error on soapPrimitiveData() " + ex.getMessage());
        ex.printStackTrace();
    } catch (Exception e) {
        Log.e("Error : " , "Error on soapPrimitiveData() " + e.getMessage());
       e.printStackTrace();
    }
    return resultstring+"";

    }
     }
    }

mi código de servicio web:

        using System;
        using System.Collections;
        using System.ComponentModel;
        using System.Data;
        using System.Linq;
        using System.Web;
        using System.Web.Services;
        using System.Web.Services.Protocols;
        using System.Xml.Linq;
        using System.Data.SqlClient;

     namespace LoginDetails
     {
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
// [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
   {


    [WebMethod]
  public String GetLoginDetails(string UserName, string Password)
    {

   try
      { 
     using (SqlConnection myConnection = new SqlConnection(@"Data Source= ./SQLEXPRESS;Initial Catalog=student;User ID=sa;Password=demo"))
    {
        myConnection.Open();

        using (SqlCommand myCommand = new SqlCommand())
        {
            myCommand.Connection = myConnection;
            myCommand.CommandText = "SELECT COUNT(*) FROM Login WHERE UserName = @UserName AND Password = @Password";
            myCommand.Parameters.Add("@UserName", SqlDbType.VarChar).Value = UserName;
            myCommand.Parameters.Add("@Password", SqlDbType.VarChar).Value = Password;
            return (int)myCommand.ExecuteScalar() == 1 ? "success" : "bad username or password";
        }
    }
}
catch (Exception ex)
    {
    Console.WriteLine(ex.Message);
    return "an error occurred.";
     } 

  }

     }


  }

mi logcat:

       10-22 21:49:17.635: DEBUG/dalvikvm(117): GC_EXTERNAL_ALLOC freed 901 objects /         

       10-22 21:49:18.015: WARN/KeyCharacterMap(117): No keyboard for id 0
       10-22 21:49:18.015: WARN/KeyCharacterMap(117): Using default keymap:  /system/usr/keychars/qwerty.kcm.bin
       10-22 21:49:22.275: INFO/ARMAssembler(58): generated s   scanline__00000077:03515104_00000000_00000000 [ 33 ipp] (47 ins) at [0x23df98:0x23e054] in 675711 ns
       10-22 21:49:42.025: INFO/System.out(274): an error occurred.
       10-22 21:49:42.045: WARN/InputManagerService(58): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@44eda178

Answer 1

Trabajar con kSOAP2 puede ser un desafío ... lo sé. Pero es una buena biblioteca y he podido hacer que funcione. He escrito un poco sobre cómo trabajar con kSOAP2 en Android. Discuto pasar parámetros simples y complejos, recibir matrices y trabajar con objetos JDBC WebRowSet por cable.

http://roderickbarnes.com/blog/droid-chronicles-web-services-handling-complex-parameters

Hay otros artículos de blog sobre cómo trabajar con kSOAP2 en el sitio. Espero que esto ayude.

Answer 2

De alguna manera, logré resolver mi problema y estoy respondiendo esta pregunta para que sea útil para las personas que ven esta publicación en el futuro.

Entonces aquí está el código modificado:

             package com.demo;
             import java.net.SocketException;
             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.app.ProgressDialog;
             import android.os.AsyncTask;
             import android.os.Bundle;
             import android.util.Log;
             import android.view.View;
             import android.view.View.OnClickListener;
             import android.widget.Button;
             import android.widget.EditText;

     public class Login extends Activity {

  private final String NAMESPACE = "http://tempuri.org/";
  private final String URL = "http://10.0.2.2/testlogin/Service1.asmx";

    String user_id;
    String password;

  @Override
   public void onCreate(Bundle savedInstanceState)
      {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button signin = (Button) findViewById(R.id.regsubmitbtn);
        signin.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {


                        EditText etxt_user = (EditText) findViewById(R.id.usereditlog);
                        user_id = etxt_user.getText().toString();
                        EditText etxt_password = (EditText)  findViewById(R.id.pwdeditlog);
                        password = etxt_password.getText().toString();

                        new LoginTask().execute();

                }
           });   
     }

    private boolean doLogin(String user_id, String password) {   

   boolean result=false;
   final String SOAP_ACTION = "http://tempuri.org/GetLogin";
   final String METHOD_NAME = "GetLogin";     
   SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

   request.addProperty("userid", user_id);
   request.addProperty("password",password);
   SoapSerializationEnvelope envelope = new   SoapSerializationEnvelope(SoapEnvelope.VER11);
   envelope.dotNet = true; // Set this variable to true for
                                                           // compatibility with what seems to be the
                                                           // default encoding for .Net-Services.
   envelope.setOutputSoapObject(request);

   System.out.println(request);

   HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);


   try {
           androidHttpTransport.call(SOAP_ACTION, envelope);
           SoapPrimitive response = (SoapPrimitive)envelope.getResponse();
           Log.i("myApp", response.toString());
           System.out.println("response" +response);

                   if(response.toString().equalsIgnoreCase("success"))
       {
                   result = true;

       }

   }catch(SocketException ex)
   {
       Log.e("Error : " , "Error on soapPrimitiveData() " + ex.getMessage());
       ex.printStackTrace();
   }
   catch (Exception e) {
       Log.e("Error : " , "Error on soapPrimitiveData() " + e.getMessage());
           e.printStackTrace();
   }
   return result;

   }


private class LoginTask extends AsyncTask<Void, Void, Void> {

    private final ProgressDialog dialog = new ProgressDialog(
                    Login.this);

    protected void onPreExecute() {

            this.dialog.setMessage("Logging in...");
            this.dialog.show();

    }


    protected Void doInBackground(final Void... unused) {

        boolean auth=doLogin(user_id,password);
        System.out.println(auth);

        return null;// don''t interact with the ui!
    }


    protected void onPostExecute(Void result) {


            if (this.dialog.isShowing()) {
            this.dialog.dismiss();
        }         
      }

    } 

   }