Ошибка анализа данных из базы данных mysql

Question

Я разрабатываю приложение для Android. Я пытаюсь получить данные из базы данных mysql, и я продолжаю получать эту ошибку. Не может показаться, что не так. Вот мой код и мои журналы.

Log:

02-02 17:00:40.289  89-89/system_process W/InputManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@41993f60 
02-02 17:00:48.338 1039-1056/com.example.busscheduledatarecorder E/My Error: Error D 
02-02 17:00:48.461 1039-1056/com.example.busscheduledatarecorder E/My Error: Error D 
02-02 17:01:05.339 1039-1056/com.example.busscheduledatarecorder E/response string: [ 02-02 17:01:05.762 1039:0x420 E/JSON Parser ] 
    Error parsing data org.json.JSONException: End of input at character 1 of 
02-02 17:01:06.228 1039-1039/com.example.busscheduledatarecorder D/AndroidRuntime: Shutting down VM 
02-02 17:01:06.265 1039-1039/com.example.busscheduledatarecorder W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x409c01f8) 
02-02 17:01:06.398 1039-1039/com.example.busscheduledatarecorder E/AndroidRuntime: FATAL EXCEPTION: main 
    java.lang.NullPointerException 
    at com.example.busscheduledatarecorder.MainActivity$Load_Routes.onPostExecute(MainActivity.java:407) 
    at com.example.busscheduledatarecorder.MainActivity$Load_Routes.onPostExecute(MainActivity.java:375) 
    at android.os.AsyncTask.finish(AsyncTask.java:602) 
    at android.os.AsyncTask.access$600(AsyncTask.java:156) 
    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 
    at android.os.Handler.dispatchMessage(Handler.java:99) 
    at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:4424) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:511) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
    at dalvik.system.NativeStart.main(Native Method) 
02-02 17:01:06.534  89-473/system_process W/ActivityManager: Force finishing activity com.example.busscheduledatarecorder/.MainActivity 

PHP код:

<?php 
$response = array(); 
$response["success"] = 0; 
$response["message"] = "No routes found"; 

// include db connect class 
include('db.php'); 

// connecting to db 
$db = new DB_CONNECT(); 

// get all routes from route table 
$result = mysql_query("SELECT * FROM route"); 

// check for empty result 
if ($result && mysql_num_rows($result) > 0) { 
// looping through all results 
// products node 
$response["routes"] = array(); 

while ($row = mysql_fetch_array($result)) { 
    // temp user array 
    $route = array(); 
    $route["busRouteId"] = $row["busRouteId"]; 
    $route["routeName"] = $row["routeName"]; 

    // push single product into final response array 
    array_push($response["routes"], $route); 
} 
// success 
$response["success"] = 1; 

} 
// Echo JSON anyway! 
echo json_encode($response); 
die(); 
?> 

Java код:

public class JSONParser { 

    String result = null; 
    DBHelper db; 
    static InputStream is = null; 
    static JSONObject jObj = null; 
    static String json = ""; 

public JSONParser() {} 

public JSONObject getJSONFromUrl(String url) { 

    // Making HTTP request 
    try { 
     // defaultHttpClient 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     HttpPost httpPost = new HttpPost(url); 

     HttpResponse httpResponse = httpClient.execute(httpPost); 
     HttpEntity httpEntity = httpResponse.getEntity(); 
     is = httpEntity.getContent(); 

    } catch (UnsupportedEncodingException e) { 
     e.printStackTrace(); 
     Log.e("My Error", "Error A " + e.toString()); 
    } catch (ClientProtocolException e) { 
     e.printStackTrace(); 
     Log.e("My Error", "Error B " + e.toString()); 
    } catch (IOException e) { 
     e.printStackTrace(); 
     Log.e("My Error", "Error C " + e.toString()); 
    } 

    try { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(is, "ISO-8859-1"), 8); 
     StringBuilder sb = new StringBuilder(); 
     String line = null; 
     Log.e("My Error", "Error D "); 
     while ((line = reader.readLine()) != null) { 
      sb.append(line + "\n"); 
      Log.e("My Error", "Error D "); 
     } 
     is.close(); 
     json = sb.toString(); 
    } catch (Exception e) { 
     Log.e("Buffer Error", "Error converting result " + e.toString()); 
    } 

    // try parse the string to a JSON object 
    try { 
     Log.e("response string",json); 
     jObj = new JSONObject(json); 
    } catch (JSONException e) { 
     Log.e("JSON Parser", "Error parsing data " + e.toString()); 
    } 

    // return JSON String 
    return jObj; 

}} 

MainActivity:

public class MainActivity extends Activity { 

DBHelper db; 
int routeloadsuccess; 

JSONArray jArray = null 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    spinroute= (Spinner)findViewById(R.id.spinnerroute); 
    pb = (ProgressBar) findViewById(R.id.progressBar); 
    pb.setVisibility(View.INVISIBLE); 
    db = new DBHelper(this); 
} 

public void shout(String voice) 
{Toast.makeText(this, voice,Toast.LENGTH_LONG).show();} 



public void insertNewRoutes(int id, String routename){ 
    //check if route exists 
    boolean exists = db.checkRouteforId(id), result = false; 
    if(exists) 
    { 
     result = db.updateRoute(id, routename); 

    } 
    else{ result = db.insertRoute(id, routename);} 
    if(result){routeloadsuccess = 1;} 

} 

private class Load_Routes extends AsyncTask<String, String, JSONObject>{ 

    InputStream is; 
    String url; 
    private static final String TAG_ROUTE = "bus_route"; 

    public Load_Routes() 
    { 
     is = null; 
     url = "http://busscheduledata.com/RouteMobile.php"; 
    } 
    @Override 
    protected JSONObject doInBackground(String... arg0) { 

     JSONParser jParser = new JSONParser(); 
     JSONObject json = jParser.getJSONFromUrl(url); 

     return json; 
    } 
    @Override 
    protected void onPreExecute() { 
     // TODO Auto-generated method stub 
     shout("Loading Routes..."); 
     pb.setVisibility(View.VISIBLE); 
    } 
    @Override 
    protected void onPostExecute(JSONObject json) { 
     // TODO Auto-generated method stub 
     pb.setVisibility(View.INVISIBLE); 
      try { 
      // Getting JSON Array 

       int success = json.getInt("success"); 
       if (success == 1) { 
        JSONArray JAStuff = json.getJSONArray("response"); 

        /** CHECK THE NUMBER OF RECORDS **/ 
        int intStuff = JAStuff.length(); 

        if (intStuff != 0) { 

         for (int i = 0; i < JAStuff.length(); i++) { 
          JSONObject JOStuff = JAStuff.getJSONObject(i); 
          Log.e("ALL THE STUFF", JOStuff.toString()); 

          // Storing JSON item in a Variable 
          int routeid = JOStuff.getInt("busRouteId"); 
          String routename = JOStuff.getString("routeName"); 

          //Set JSON Data in spinner 
          insertNewRoutes(routeid,routename); 

         } 
        } 
       } 




     } catch (JSONException e) { 
      e.printStackTrace(); 
      shout("Loading failed"); 
     } 



    } 
    }//end of loading route thingy 



    @Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    populateMenu(menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    applyMenuChoice(item); 
    return(applyMenuChoice(item) ||super.onOptionsItemSelected(item)); 
} 

private void populateMenu(Menu menu) { 
    menu.add(0, SIXTEEN_ID, 0, "Get Routes"); 
} 
private boolean applyMenuChoice(MenuItem item) { 
    Intent intent; 
    switch (item.getItemId()) 
    { 
     case SIXTEEN_ID: 
      db.deleteAllRoutes(); 
      Load_Routes lr = new Load_Routes(); 
      lr.execute(); 
      if(routeloadsuccess == 1){ 
      shout("Loading Complete"); 
      intent = new Intent(getApplicationContext(), MainActivity.class); 
      startActivity(intent);} 
      return(true); 
     //break; 

    } 
    return true ; 
} 


} 

Answer 1

Log.e("response string",json); 

Эта линия печати: строка E/ответ: п

Ваш ответ "п", который является строкой. В следующей строке вы преобразуете его в JsonObject, который определенно будет генерировать исключение.

jObj = new JSONObject(json); 

Изменение ответа от сервера из строки в Json