구문 분석 된 JSON 데이터가 android에 표시되지 않습니다.

Question

PHP 파일에서 생성 된 JSON 문자열이 있습니다. 문제는 JSON 문자열이 안드로이드의 textview에 나타나지 않는다는 것입니다. 왜 아무도 설명 할 수 있습니까?

public class AllUsersActivity extends ListActivity { 

// Progress Dialog 
private ProgressDialog pDialog; 

// Creating JSON Parser object 
JSONParser jParser = new JSONParser(); 

ArrayList<HashMap<String, String>> usersList; 

// url to get all users list 
private static String url_all_users = "http://10.0.2.2/android_connect/get_all_users.php"; 

// JSON Node names 
private static final String TAG_SUCCESS = "success"; 
private static final String TAG_USERS = "users"; 
private static final String TAG_UID = "UserID"; 
private static final String TAG_FIRSTNAME = "FirstName"; 

// users JSONArray 
JSONArray users = null; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.all_users); 

    // Hashmap for ListView 
    usersList = new ArrayList<HashMap<String, String>>(); 

    // Loading users in Background Thread 
    new LoadAllusers().execute(); 

    // Get listview 
    ListView lv = getListView(); 

    // on seleting single product 
    // launching Edit Product Screen 
    lv.setOnItemClickListener(new OnItemClickListener() { 

     public void onItemClick(AdapterView<?> parent, View view, 
       int position, long id) { 
      // getting values from selected ListItem 
      String uid = ((TextView) view.findViewById(R.id.uid)).getText() 
        .toString(); 

      // Starting new intent 
      Intent in = new Intent(getApplicationContext(), 
        UserDetailsActivity.class); 
      // sending uid to next activity 
      in.putExtra(TAG_UID, uid); 

      // starting new activity and expecting some response back 
      startActivityForResult(in, 100); 
     } 
    }); 

} 


/** 
* Background Async Task to Load all product by making HTTP Request 
* */ 
class LoadAllusers extends AsyncTask<String, String, String> { 

    /** 
    * Before starting background thread Show Progress Dialog 
    * */ 
    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog = new ProgressDialog(AllUsersActivity.this); 
     pDialog.setMessage("Loading users. Please wait..."); 
     pDialog.setIndeterminate(false); 
     pDialog.setCancelable(false); 
     pDialog.show(); 
    } 

    /** 
    * getting All users from url 
    * */ 
    protected String doInBackground(String... args) { 
     // Building Parameters 
     List<NameValuePair> params = new ArrayList<NameValuePair>(); 
     // getting JSON string from URL 
     JSONObject json = jParser.makeHttpRequest(url_all_users, "GET", params); 

     // Check your log cat for JSON reponse 
     Log.d("All users: ", json.toString()); 

     try { 
      // Checking for SUCCESS TAG 
      int success = json.getInt(TAG_SUCCESS); 

      if (success == 1) { 
       // users found 
       // Getting Array of users 
       users = json.getJSONArray(TAG_USERS); 

       // looping through All users 
       for (int i = 0; i < users.length(); i++) { 
        JSONObject c = users.getJSONObject(i); 

        // Storing each json item in variable 
        String id = c.getString(TAG_UID); 
        String name = c.getString(TAG_FIRSTNAME); 

        // creating new HashMap 
        HashMap<String, String> map = new HashMap<String, String>(); 

        // adding each child node to HashMap key => value 
        map.put(TAG_UID, id); 
        map.put(TAG_FIRSTNAME, name); 

        // adding HashList to ArrayList 
        usersList.add(map); 
       } 
      } 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 

     return null; 
    } 

    /** 
    * After completing background task Dismiss the progress dialog 
    * **/ 
    protected void onPostExecute(String file_url) { 
     // dismiss the dialog after getting all users 
     pDialog.dismiss(); 
     // updating UI from Background Thread 
     runOnUiThread(new Runnable() { 
      public void run() { 
       /** 
       * Updating parsed JSON data into ListView 
       * */ 
       ListAdapter adapter = new SimpleAdapter(
         AllUsersActivity.this, usersList, 
         R.layout.list_item, new String[] { TAG_UID, 
           TAG_FIRSTNAME}, 
         new int[] { R.id.uid, R.id.name }); 
       // updating listview 
       setListAdapter(adapter); 
      } 
     }); 

    } 

} 
} 

이 내가 오류를 발견 한 PHP 파일

{"Users":[{"0":[],"UserID":"1","FirstName":"lalawee","Email":"12345","Password":null},{"0":[],"UserID":"2","FirstName":"shadowblade721","Email":"12345","Password":null,"1":[]},{"0":[],"UserID":"3","FirstName":"dingdang","Email":"12345","Password":null,"1":[],"2":[]},{"0":[],"UserID":"4","FirstName":"solidsnake0328","Email":"12345","Password":null,"1":[],"2":[],"3":[]}],"success":1} 

Answer 1

에서 JSON 문자열입니다.

대소 문자가 구분됩니다.

사용자 -> 사용자

실수로 내 부분. 죄송합니다.

저를 도와 주셔서 감사합니다!