Fehler beim Analysieren JSON-Objekt in Android

Question

Ich sehe diesen Code im Internet und folgen dort Schritte dann ich Bulif. PHP-Dateien und die phpmyadmin Datenbank dann ich die PHP-Dateien testen sie Erfolg in Verbindung werfen den Webbrowser, die Ergebnisse des Webs Browser-PHP-Test als {"results_data":"success"} anzeigen.

public class SignupActivity extends AsyncTask<String, Void, String> { 

    private Context context; 

    public SignupActivity(Context context) { 
     this.context = context; 
    } 

    protected void onPreExecute() { 

    } 

    @Override 
    protected String doInBackground(String... arg0) { 
     String fullName = arg0[0]; 
     String userName = arg0[1]; 
     String passWord = arg0[2]; 
     String phoneNumber = arg0[3]; 
     String emailAddress = arg0[4]; 

     String link; 
     String data; 
     BufferedReader bufferedReader; 
     String result; 

     try { 
      data = "?fullname=" + URLEncoder.encode(fullName, "UTF-8"); 
      data += "&username=" + URLEncoder.encode(userName, "UTF-8"); 
      data += "&password=" + URLEncoder.encode(passWord, "UTF-8"); 
      data += "&phonenumber=" + URLEncoder.encode(phoneNumber, "UTF-8"); 
      data += "&emailaddress=" + URLEncoder.encode(emailAddress, "UTF-8"); 

      link = "http://testandroid.netai.net/signup.php" + data; 
      URL url = new URL(link); 
      HttpURLConnection con = (HttpURLConnection) url.openConnection(); 

      bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream())); 
      result = bufferedReader.readLine(); 
      return result; 
     } catch (Exception e) { 
      return new String("Exception: " + e.getMessage()); 
     } 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     String jsonStr = result; 
     if (jsonStr != null) { 
      try { 
       JSONObject jsonObj = new JSONObject(jsonStr); 
       String query_result = jsonObj.getString("query_result"); 
       if (query_result.equals("SUCCESS")) { 
        Toast.makeText(context, "Data inserted successfully. Signup successfull.", Toast.LENGTH_SHORT).show(); 
       } else if (query_result.equals("FAILURE")) { 
        Toast.makeText(context, "Data could not be inserted. Signup failed.", Toast.LENGTH_SHORT).show(); 
       } else { 
        Toast.makeText(context, "Couldn't connect to public class SignupActivity extends AsyncTask<String, Void, String> { 

    private Context context; 

    public SignupActivity(Context context) { 
     this.context = context; 
    } 

    protected void onPreExecute() { 

    } 

    @Override 
    protected String doInBackground(String... arg0) { 
     String fullName = arg0[0]; 
     String userName = arg0[1]; 
     String passWord = arg0[2]; 
     String phoneNumber = arg0[3]; 
     String emailAddress = arg0[4]; 

     String link; 
     String data; 
     BufferedReader bufferedReader; 
     String result; 

     try { 
      data = "?fullname=" + URLEncoder.encode(fullName, "UTF-8"); 
      data += "&username=" + URLEncoder.encode(userName, "UTF-8"); 
      data += "&password=" + URLEncoder.encode(passWord, "UTF-8"); 
      data += "&phonenumber=" + URLEncoder.encode(phoneNumber, "UTF-8"); 
      data += "&emailaddress=" + URLEncoder.encode(emailAddress, "UTF-8"); 

      link = "http://testandroid.netai.net/signup.php" + data; 
      URL url = new URL(link); 
      HttpURLConnection con = (HttpURLConnection) url.openConnection(); 

      bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream())); 
      result = bufferedReader.readLine(); 
      return result; 
     } catch (Exception e) { 
      return new String("Exception: " + e.getMessage()); 
     } 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     String jsonStr = result; 
     if (jsonStr != null) { 
      try { 
       JSONObject jsonObj = new JSONObject(jsonStr); 
       String query_result = jsonObj.getString("query_result"); 
       if (query_result.equals("SUCCESS")) { 
        Toast.makeText(context, "Data inserted successfully. Signup successfull.", Toast.LENGTH_SHORT).show(); 
       } else if (query_result.equals("FAILURE")) { 
        Toast.makeText(context, "Data could not be inserted. Signup failed.", Toast.LENGTH_SHORT).show(); 
       } else { 
        Toast.makeText(context, "Couldn't connect to remote database.", Toast.LENGTH_SHORT).show(); 
       } 
      } catch (JSONException e) { 
       e.printStackTrace(); 
       Toast.makeText(context, "Error parsing JSON data.", Toast.LENGTH_SHORT).show(); 
      } 
     } else { 
      Toast.makeText(context, "Couldn't get any JSON data.", Toast.LENGTH_SHORT).show(); 
     } 
    } 
} 

Answer 1

Versuchen Sie, diese erste

  JSONObject jsonObj = new JSONObject(jsonStr); 
      String query_result = jsonObj.getString("query_result"); 
      if (query_result.equals("success")) { 
       Toast.makeText(context, "Data inserted successfully. Signup successfull.", Toast.LENGTH_SHORT).show(); 
      } else if (query_result.equals("failure")) { 
       Toast.makeText(context, "Data could not be inserted. Signup failed.", Toast.LENGTH_SHORT).show(); 
      }