Android Web服务无法解析localhost中的数据

Question

I am trying to connect Android App to java webservice to get pHp parsed values.

Php Script is :

<?php
$data = array('name' => 'Froyo', 'version' => 'Android 2.2'); 
print (json_encode($data)); 
?> 

And the Java WebService is :

package com.json.php;

import android.app.Activity;
import android.os.Bundle;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import android.widget.TextView;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;


public class JSONExampleActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://127.0.0.1/test.php");
        TextView textView = (TextView)findViewById(R.id.textView1);
        try {

            HttpResponse response = httpclient.execute(httppost);
            String jsonResult = inputStreamToString(response.getEntity().getContent()).toString();
            JSONObject object = new JSONObject(jsonResult);

            String name = object.getString("name");
            String verion = object.getString("version");
            textView.setText(name + " - " + verion);

        } 
        catch (JSONException e) {
            e.printStackTrace();
        } 
        catch (ClientProtocolException e) {
            e.printStackTrace();
        } 
        catch (IOException e) {
            e.printStackTrace();
        }


       }
    private StringBuilder inputStreamToString(InputStream is) {
        String rLine = "";
        StringBuilder answer = new StringBuilder();
        BufferedReader rd = new BufferedReader(new InputStreamReader(is));

        try {
         while ((rLine = rd.readLine()) != null) {
          answer.append(rLine);
           }
        }

        catch (IOException e) {
            e.printStackTrace();
         }
        return answer;
       }
}

I tried both http://127.0.0.1/test.php and http://localhost/test.php in HttpPost, It doesn't works. I checked my php file on the browser and that gives the result fine. Where am i Going wrong? Also i am working on a Mac, is that anyway related to the problem because of all the permission issues?

Answer 1

Just take a look at this page : http://developer.android.com/tools/devices/emulator.html#networkaddresses

You'll notice that they refer to:

• 10.0.2.2 as Special alias to your host loopback interface (i.e., 127.0.0.1 on your development machine)
• 127.0.0.1 as The emulated device's own loopback interface

Hope I answered and solved your problem :)