php - Display data in Android with the help of web service -


i trying display data in android of php web service, think problems code data not displayed. giving here code of both file

code of web service :

<?php $dbhandle = mysql_connect($hostname, $username, $password,$datbase_name)   or die("unable connect    mysql"); $selected = mysql_select_db("code_lessions",$dbhandle)  or die("could not select examples"); $final_data = array(); $query="select * lessiondetail";  if ($query_run = mysql_query($query))      {          $i=0;         while($query_row = mysql_fetch_assoc($query_run))          {              $username = $query_row['lessionname'];              $password = $query_row ['categoryname'];              $id = $query_row ['lessionid'];              //echo $username .'`s password : '. $password.'<br>';              $data = array('lessionid'=>$id , 'lessionname'=>$username ,'categoryname'=>$password);              $final_data[$i]=$data;             $i++;             //print(json_encode($data));              //print(json_encode($password));          }          print(json_encode($final_data));     }else{      echo mysql_error();      } ?>

file : jsonexampleactivity.java

package com.json.php;  import android.app.activity; import android.os.bundle; import android.widget.textview;  import java.io.bufferedreader; import java.io.ioexception; import java.io.inputstream; import java.io.inputstreamreader; import java.util.arraylist; import java.util.hashmap;  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.jsonarray; import org.json.jsonexception; import org.json.jsonobject;   public class jsonexampleactivity extends activity {     /** called when activity first created. */     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);         httpclient httpclient = new defaulthttpclient();         httppost httppost = new httppost("http://code.guru99.com/android.php");         textview textview = (textview)findviewbyid(r.id.textview1);         try {             httpresponse response = httpclient.execute(httppost);             string jsonresult = inputstreamtostring(response.getentity().getcontent()).tostring();             jsonobject jobject = new jsonobject(jsonresult);             jsonarray json = new jsonarray(jobject.getstring(jsonresult));             arraylist<hashmap<string, string>> mylist = new arraylist<hashmap<string, string>>();             hashmap<string, string> map = new hashmap<string, string>();             for(int i=0;i<json.length();i++){                        /*map = new hashmap<string, string>();                                 jsonobject e = json.getjsonobject(i);                                 map.put("id",  string.valueof(i));                                 map.put("name", "lname" + e.getstring("name"));                                 map.put("category", "category: " +  e.getstring("category"));                                 mylist.add(map);                                system.out.println("the values are: " + map.values());*/                 jsonobject oneobject = json.getjsonobject(i);                 // pulling items array                 string id = oneobject.getstring("id");                 string name = oneobject.getstring("name");                 string category = oneobject.getstring("category");                 textview.settext(id + "-" + name + "-" + category);                             }         }          catch (jsonexception e) {             e.printstacktrace();         }          catch (clientprotocolexception e) {             e.printstacktrace();         }          catch (ioexception e) {             e.printstacktrace();         }          }     private jsonobject jsonobject(string jsonresult) {         // todo auto-generated method stub         return null;     }     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;        } }

there 2 records in database , want display whole data table , nothing displayed.

this not complete answer use following debug code.

httpresponse response = httpclient.execute(httppost);         string jsonresult = inputstreamtostring(response.getentity().getcontent()).tostring(); log.d("jsondebug" , jsonresult);

this display input receiving in log cat. there easier determine if json in wring format or if input reader nothing @ all, think more case since post seems did not jsonparser error


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