Connection refused when trying to acces local webservice using Android

问题

I am creating a server built in Visual Basic 2010 and that program can insert/update/delete to a database that I use. I created a local Web Service that is used to synchronize the database on the server with the database in Android.

I use the following Android code :

package com.zelacroix.bukumenu;

import java.io.IOException;
import java.io.InputStream;

import org.apache.http.*;
import org.apache.http.client.*;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.params.*;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class Sinc extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sinc);
        Toast.makeText(getApplicationContext(), getKategori(), 5).show();
    }

    public String getKategori(){
        HttpParams httpParameters = new BasicHttpParams();
        HttpConnectionParams.setConnectionTimeout(httpParameters, 60000);
        HttpConnectionParams.setSoTimeout(httpParameters, 60000);
        HttpClient client=new DefaultHttpClient(httpParameters);
        HttpPost httpPost = new HttpPost("http://192.168.1.2:1924/TugasAkhir/Service.asmx/getKategori");
        HttpResponse response;
        String result="";
        try
        {
            response=client.execute(httpPost);
            HttpEntity entity= response.getEntity();
            DataHandler dataHandler = new DataHandler();
            if (entity!=null)
            {
                InputStream instream = entity.getContent();
                result = dataHandler.convertStreamToString(instream);
                instream.close();
            }
        } catch (ConnectTimeoutException e) {
                e.printStackTrace();
                Toast.makeText(getApplicationContext(), e.toString(), 100).show();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), e.toString(), 100).show();
        }
        return result;
    }


}

I get an error : org.apache.http.conn.httphostconnectexception connection to ``http://192.168.1.2:1924..... refused

For your information.. This code runs successfully when I'm using the emulator and change the IP address to 10.0.2.2.

This code also run successfully when I access a hosted online web service. It fails only when I run the web service as local and try to access it with an Android device using my laptop's IP (192.168.1.2).

I am using WIFI.

How can I fix this error?

回答1:

Try adding:

if (android.os.Build.VERSION.SDK_INT > 9) {
    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
}

Does this help?

回答2:

check your laptop ip and your device ip.

it should be in same sub net mask

The laptop and mobile(android) device ip must be 192.168.X.X

回答3:

finally its solved.. the problem is visual studio 2010 so complicated in setting the IIS, then i try to developt my web service on Visual studio 2008 and IIS work fine! the Android can access the web service without connection refused.

回答4:

Ran into this problem but the solution was rather something some would encounter by familiarity.

Make your the <uses-permission android:name="android.permission.INTERNET"/> is on your Manifest.

来源：https://stackoverflow.com/questions/11614295/connection-refused-when-trying-to-acces-local-webservice-using-android

标签

android

web-services

android-wifi