Twitter客戶端中的JSON異常

Question

我正在基於教程開發基於Android的Twitter客戶端，但在對應用程序進行授權後，它只顯示「JSON異常」一詞。沒有時間線出現。

這裏是包含的JSONObject

package com.tmm.android.twitter.reader; 

import java.util.ArrayList; 
import java.util.List; 

import org.json.JSONException; 
import org.json.JSONObject; 

import twitter4j.Paging; 
import twitter4j.Status; 
import twitter4j.Twitter; 
import twitter4j.TwitterException; 
import android.util.Log; 

import com.tmm.android.twitter.util.Utility; 

public class TweetReader { 

    private static final String screenName = "rob_hinds"; 


    /** 
    * a method to retrive a list of tweets from the users who the current user 
    * is following 
    * @return List JSON of other tweets 
    */ 
    public static ArrayList<JSONObject> retrieveSpecificUsersTweets(Twitter twitter){ 
     List<Status> statuses = new ArrayList<Status>(); 
     try { 
      Paging p = new Paging(1); //get first page only of timeline - dont want to return everything! 
      statuses = twitter.getFriendsTimeline(p); 
     } catch (TwitterException e) { 
      Log.e("Twitter", "Error retrieving tweets"); 
      Log.e("Twitter", e.getMessage()); 
     } 

     return convertTimelineToJson(statuses); 
    } 



    /** 
    * Method that converts a list of Status' to a JSON array that can 
    * be displayed by the grid view 
    * 
    * @param statuses 
    * @return 
    */ 
    private static ArrayList<JSONObject> convertTimelineToJson(List<Status> statuses) { 
     ArrayList<JSONObject> JOBS = new ArrayList<JSONObject>(); 
     try { 
      if (statuses.size()>0){ 
       for (Status s : statuses){ 
        String avatar = "http://" + s.getUser().getProfileImageURL().getHost() + s.getUser().getProfileImageURL().getPath(); 
        JSONObject object = new JSONObject(); 
        object.put("tweet", s.getText()); 
        String timePosted = Utility.getDateDifference(s.getCreatedAt()); 
        object.put("tweetDate", timePosted); 
        object.put("author", s.getUser().getName()); 
        object.put("avatar", avatar); 
        object.put("userObj", s.getUser()); 
        object.put("tweetId", s.getId()); 

        JOBS.add(object); 
       } 
      }else{ 
       JSONObject object = new JSONObject(); 
       object.put("tweet", "You have not logged in yet! Please log on to view latest tweets"); 
       object.put("author", ""); 
       JOBS.add(object); 
      } 

     } catch (JSONException e1) { 
      Log.e("JSON", "There was an error creating the JSONObject", e1); 
     } 
     return JOBS; 
    } 
} 

任何幫助將真正理解

Answer 1

它可能無法在object.put("userObj", s.getUser());

你只能把一個JSONObject，JSONArray，字符串，布爾類，在put方法中，Integer，Long，Double，NULL或null值。 s.getUser()就是這些。