android studio中的本地主机被拒绝

Question

I am using wampserver and trying fetch record from server using php script through json parsing. And I want to display that data on my android app....

My script code is clear and it worked perfect..And I am also clear with android code. But when I run my app the data is not display on my app....

This is my android code....

package com.example.abc.testdatabase;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.widget.TextView;


public class TestExternalDatabaseActivity extends Activity {
/** Called when the activity is first created. */

TextView resultView;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
   StrictMode.enableDefaults(); //STRICT MODE ENABLED
   resultView = (TextView) findViewById(R.id.result);

    getData();
}

public void getData(){
    String result = "";
    InputStream isr = null;
    try{
        HttpClient httpclient = new DefaultHttpClient();

        HttpPost httppost = new HttpPost("http://10.0.2.2/getAllCustomers.php");
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        isr = entity.getContent();
}
catch(Exception e){
        Log.e("log_tag", "Error in http connection "+e.toString());
        resultView.setText("Couldnt connect to database");
}
//convert response to string
try{
        BufferedReader reader = new BufferedReader(new InputStreamReader(isr,"iso-8859-1"),8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
        }
        isr.close();

        result=sb.toString();
}
catch(Exception e){
        Log.e("log_tag", "Error  converting result "+e.toString());
}

//parse json data
       try {
       String s = "";
       JSONArray jArray = new JSONArray(result);

   for(int i=0; i<jArray.length();i++){
       JSONObject json = jArray.getJSONObject(i);
       s = s + 
               "Name : "+json.getString("FirstName")+" "+json.getString("LastName")+"\n"+
               "Qualification : "+json.getInt("Qualification")+"\n"+
               "Mobile Using : "+json.getString("Mobile")+"\n\n";
       }

      resultView.setText(s);

   } catch (Exception e) {
// TODO: handle exception
   Log.e("log_tag", "Error Parsing Data "+e.toString());
   }

    }

  }

Following is error I am facing...........

Error Parsing Data org.json.JSONException: Value <br of type    java.lang.String cannot be converted to JSONArray

Following is my php script...........

<?php
$con = mysql_connect("localhost","root","");
if (!$con)
{
      die('Could not connect: ' . mysql_error()); 

}
 mysql_select_db("testDatabase", $con);
 $result = mysql_query("SELECT * FROM Customer");
 while($row = mysql_fetch_assoc($result))
 {
       $output[]=$row;
 }
 print(json_encode($output));
 mysql_close($con);

?>

I don't understand why I am not getting any records.... If anyone round this then please help for this.....

Log.e................
     <br />
     <font size='1'><table class='xdebug-error xe-deprecated' dir='ltr'            border='1' cellspacing='0' cellpadding='1'>
     <tr><th align='left' bgcolor='#f57900' colspan="5"><span   style='background-color: #cc0000; color: #fce94f; font-size: x-large;'>( ! )   </span> Deprecated: mysql_connect(): The mysql extension is deprecated and will   be removed in the future: use mysqli or PDO instead in  C:\wamp\www\TestDatabase\connection.php on line <i>3</i></th></tr>
     <tr><th align='left' bgcolor='#e9b96e' colspan='5'>Call Stack</th></tr>
     <tr><th align='center' bgcolor='#eeeeec'>#</th><th align='left' bgcolor='#eeeeec'>Time</th><th align='left' bgcolor='#eeeeec'>Memory</th><th align='left' bgcolor='#eeeeec'>Function</th><th align='left' bgcolor='#eeeeec'>Location</th></tr>
     <tr><td bgcolor='#eeeeec' align='center'>1</td><td bgcolor='#eeeeec' align='center'>0.0170</td><td bgcolor='#eeeeec' align='right'>135864</td><td bgcolor='#eeeeec'>{main}(  )</td><td title='C:\wamp\www\TestDatabase\getAllCustomer.php' bgcolor='#eeeeec'>..\getAllCustomer.php<b>:</b>0</td></tr>
     <tr><td bgcolor='#eeeeec' align='center'>2</td><td bgcolor='#eeeeec' align='center'>0.0190</td><td bgcolor='#eeeeec' align='right'>137344</td><td bgcolor='#eeeeec'>include_once( <font color='#00bb00'>'C:\wamp\www\TestDatabase\connection.php'</font> )</td><td title='C:\wamp\www\TestDatabase\getAllCustomer.php' bgcolor='#eeeeec'>..\getAllCustomer.php<b>:</b>4</td></tr>
     <tr><td bgcolor='#eeeeec' align='center'>3</td><td bgcolor='#eeeeec' align='center'>0.0190</td><td bgcolor='#eeeeec' align='right'>137528</td><td bgcolor='#eeeeec'><a href='http://www.php.net/function.mysql-connect' target='_new'>mysql_connect</a>
(  )   </td><td title='C:\wamp\www\TestDatabase\connection.php' bgcolor='#eeeeec'>..\connection.php<b>:</b>3</td></tr>
       </table></font>
      [{"FirstName":"Vandana    ","LastName":"Rao","Qualification":"MscICT","Mobile":"Sony Xepri"}]
      03-23 10:29:26.965    2426-2426/com.example.abc.testdatabase E/log_tag﹕   Error Parsing Data org.json.JSONException: Value <br of type java.lang.String   cannot be converted to JSONArray

Answer 1

The <br part of the exception indicates that the response you get is not a json response, but rather html.
I would guess that your result is an exception (or the output from die('Could not connect: ' . mysql_error()); ).

Log the result string before trying to parse it, and I'm sure you will find a lot more information about the error.

---

Update after error message was added to original post:

Your error message is a notice about a deprecated function (the mysql_* api), an api that should not be used.
You get this notice cause you show all errors (Which is good in development).
I would recommend switching to mysqli or PDO as the error message says.

I would recommend that any error messages caught by the php script is returned as a failure response with a error message in json, like:

die(json_encode(array('result' => false, 'error' => $error)));

Instead of just printing them as html or text, this way you can catch them in the java code and handle them as you wish on that side.
You should also set the content type to application/json in the php-script, but it should work even without that.