title: i m trying to get response from server and retrieving it using JSON. java.lang.string cannot be convert into jsonObject
body: <p>i m trying to get response from server and retrieving it using JSON everything is going great without any error but my IF statement is not executing, program is jumping on other execution task, when i debug my app it says that java.lang.string cannot be converted to jsonObject that's why it is not executing it.... i m new in this programming and it is my first application. I hope anyone can help me please. i m attaching my BackgroundTask.java and server response, if anything else is needed please tell me.</p>
  
  <p><strong>BackgroundTask.java</strong>:</p>
  
  <pre><code>'package in.co.medimap.www.myfirstapp;
  
  import android.app.Activity;
  import android.app.AlertDialog;
  import android.app.ProgressDialog;
  import android.content.Context;
  import android.content.DialogInterface;
  import android.content.Intent;
  import android.os.AsyncTask;
  import android.widget.EditText;
  import org.json.JSONArray;
  import org.json.JSONException;
  import org.json.JSONObject;
  import com.google.gson.*;
  import java.io.BufferedReader;
  import java.io.BufferedWriter;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.OutputStream;
  import java.io.OutputStreamWriter;
  import java.io.UnsupportedEncodingException;
  import java.net.HttpURLConnection;
  import java.net.MalformedURLException;
  import java.net.ProtocolException;
  import java.net.URL;
  import java.net.URLEncoder;
  
  /**
  * Created by sony on 29-04-2016.
  */
  public class BackgroundTask extends AsyncTask&lt;String,Void,String&gt;
  {
      String register_url = "http://192.168.42.14/loginapp/register.php";
      String login_url = "http://192.168.42.14/loginapp/login.php";
      String json;
      JSONArray peoples;
      Context ctx;
      ProgressDialog progressDialog;
      Activity activity;
      AlertDialog.Builder builder;
  
      public BackgroundTask(Context ctx)
      {
          this.ctx=ctx;
          activity = (Activity)ctx;
      }
  
      @Override
      protected void onPreExecute()
      {
          super.onPreExecute();
          builder  = new AlertDialog.Builder(activity);
          progressDialog = new ProgressDialog(ctx);
          progressDialog.setTitle("Please Wait");
          progressDialog.setMessage("Connecting to server .... ");
          progressDialog.setIndeterminate(true);
          progressDialog.setCancelable(false);
          progressDialog.show();
      }
  
      @Override
      protected String doInBackground(String... params)
      {
          String method = params[0];
          if (method.equals("register")) {
              try 
              {
                  URL url = new URL(register_url);
                  HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
                  httpURLConnection.setRequestMethod("POST");
                  httpURLConnection.setDoOutput(true);
                  httpURLConnection.setDoInput(true);
                  OutputStream outputStream=httpURLConnection.getOutputStream();
                  BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
                  String owner_name = params[1];
                  String shop_name = params[2];
                  String phone_no = params[3];
                  String shop_address=params[4];
                  String password=params[5];
                  String data = URLEncoder.encode("owner_name","UTF-8")+"="+URLEncoder.encode(owner_name,"UTF-8")+"&amp;"+
                          URLEncoder.encode("shop_name","UTF-8")+"="+URLEncoder.encode(shop_name,"UTF-8")+"&amp;"+
                          URLEncoder.encode("phone_no","UTF-8")+"="+URLEncoder.encode(phone_no,"UTF-8")+"&amp;"+
                          URLEncoder.encode("shop_address","UTF-8")+"="+URLEncoder.encode(shop_address,"UTF-8")+"&amp;"+
                          URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(password,"UTF-8");
                  bufferedWriter.write(data);
                  bufferedWriter.flush();
                  bufferedWriter.close();
                  outputStream.close();
                  InputStream inputStream = httpURLConnection.getInputStream();
                  BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                  StringBuilder stringBuilder = new StringBuilder();
                  String line = "";
                  while ((line=bufferedReader.readLine())!=null)
                  {
                      stringBuilder.append(line+"\n");
                  }
                  httpURLConnection.disconnect();
                  Thread.sleep(5000);
                  return  stringBuilder.toString().trim();
              } catch (MalformedURLException e) {
                  e.printStackTrace();
              } catch (IOException e) {
                  e.printStackTrace();
              } catch (InterruptedException e) {
                  e.printStackTrace();
              }
          }
          else if(method.equals("login"))
          {
              try
              {
                  URL url = new URL(login_url);
                  HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
                  httpURLConnection.setRequestMethod("POST");
                  httpURLConnection.setDoOutput(true);
                  httpURLConnection.setDoInput(true);
                  OutputStream outputStream=httpURLConnection.getOutputStream();
                  BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
                  String phone_no,password;
                  phone_no=params[1];
                  password=params[2];
                  String data =URLEncoder.encode("phone_no","UTF-8")+"="+URLEncoder.encode(phone_no,"UTF-8")+"&amp;"+
                               URLEncoder.encode("password","UTF-8")+"="+URLEncoder.encode(password,"UTF-8");
                  bufferedWriter.write(data);
                  bufferedWriter.flush();
                  bufferedWriter.close();
                  outputStream.close();
                  InputStream inputStream = httpURLConnection.getInputStream();
                  BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
                  StringBuilder stringBuilder = new StringBuilder();
                  String line="";
                  while ((line=bufferedReader.readLine())!=null)
                  {
                      stringBuilder.append(line+"\n");
                  }
                  httpURLConnection.disconnect();
                  Thread.sleep(5000);
                  return stringBuilder.toString().trim();
              } catch (MalformedURLException e) {
                  e.printStackTrace();
              } catch (UnsupportedEncodingException e) {
                  e.printStackTrace();
              } catch (ProtocolException e) {
                  e.printStackTrace();
              } catch (IOException e) {
                  e.printStackTrace();
              } catch (InterruptedException e) {
                  e.printStackTrace();
              }
          }
          return null;
      }
  
      @Override
      protected void onProgressUpdate(Void... values) {
          super.onProgressUpdate(values);
      }
  
      @Override
      protected void onPostExecute(String json)
      {
          progressDialog.dismiss();
          try
          {
              JSONObject jsonObject = new JSONObject(json);
              peoples = jsonObject.getJSONArray("server_response");
              JSONObject JO = peoples.getJSONObject(0);
              String code = JO.getString("code");
              String message = JO.getString("message");
      //problem starts from here
              if (code.equals("reg_true"))
              {
                  showDialog("Registration Success", code, message);
              }
              else if (code.equals("reg_false")) {
                  showDialog("Registration Failed", code, message);
              }
              else if (code.equals("login_true")) {
                  Intent intent = new Intent(activity, HomeActivity.class);
                  intent.putExtra("message", message);
                  activitcode.equals("login_false")) {
                      showDialog("Login Error...",code, message);
                  }
              }
      //IF statement is not executing due to java.lang.string cannot be converted    into jsonObject
          } catch (JSONException e) {
              e.printStackTrace();
          }
      }
  
      public void showDialog(String title, String code, String message)
      {
          builder.setTitle(title);
          if(code.equals("reg_true")||code.equals("reg_false"))
          {
              builder.setMessage(message);
              builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                  @Override
                  public void onClick(DialogInterface dialog, int which) {
                      dialog.dismiss();
                      activity.finish();
                  }
              });
          }
          else if (code.equals("login_false")) {
              builder.setMessage(message);
              builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                  @Override
                  public void onClick(DialogInterface dialog, int which) {
                      EditText phone_no, password;
                      phone_no = (EditText) activity.findViewById(R.id.phone_no);
                      password = (EditText) activity.findViewById(R.id.password);
                      phone_no.setText("");
                      password.setText("");
                      dialog.dismiss();
                  }
              });
          }
         AlertDialog alertDialog =builder.create();
         alertDialog.show();
      }
  }
  
  //server response for registration success
  
  {"server_response":[{"code":"reg_true","0":"message=&gt;Registration    Success...Thank you....."}]}
  </code></pre>