title: Android - JSONException No value for
body: <p>I know that there are several questions posted on here with the same topic and error, but none of them indicate the same problem as mine, so I decided to post my question here, hoping that someone would help me point out the cause.
  So I'm trying to implement the login feature in my app and here's the code:</p>
  
  <pre><code>if (tag.equalsIgnoreCase(login_tag)){
                  // check for login response
                  try {
                      if (json.getString(KEY_SUCCESS) != null) {
                          String res = json.getString(KEY_SUCCESS);
                          if(Integer.parseInt(res) == 1){
                              // user successfully logged in
                              // Store user details in SQLite Database
                              DatabaseHandler db = new DatabaseHandler(mContext);
                              JSONObject json_user = json.getJSONObject("user");
  
                              // Clear all previous data in database
                              logoutUser(mContext);
                              Toast.makeText(mContext, json.toString(3), Toast.LENGTH_LONG).show();
                              db.addUser(json_user.getString(KEY_EMAIL), json_user.getString(KEY_NAME), json.getString(KEY_UID), json.getString(KEY_AVA), json_user.getString(KEY_BDAY), json_user.getString(KEY_COUNTRY), json_user.getString(KEY_PREF), json_user.getString(KEY_SPEND));  
  
                              // Launch Dashboard Screen
                              Intent dashboard = new Intent(mContext, DashboardActivity.class);
  
                              // Close all views before launching Dashboard
                              dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                              mContext.startActivity(dashboard);
  
                              // Close Login Screen
                              ((Activity) mContext).finish();
                          }
                      }
                  } catch (JSONException e) {
                      e.printStackTrace();
                  }
              }
  </code></pre>
  
  <p>And this is the JSON response I got when logging in:</p>
  
  <pre><code>{
      "tag": "login",
      "success": 1,
      "error": 0,
      "uid": "5123",
      "user": {
          "email": "abcxyz@gmail.com",
          "name": "abc",
          "avatar": "avatars/img_hzsxda_2013-03-18-11-03-33.jpg",
          "bday": "1991-02-01",
          "country": "Australia",
          "preferences": "none",
          "spending": "none"
      }
  }
  </code></pre>
  
  <p>So apparently there is a value for <code>avatar</code>, but I still got this warning in my logcat:</p>
  
  <pre><code>03-18 12:06:36.972: W/System.err(24574): org.json.JSONException: No value for avatar
  </code></pre>
  
  <p>Since no value avatar is got, I can't complete <code>addUser</code>, hence login fails.
  Please help me find the error and how to solve it. Thank you.</p>