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util.concurrent.FutureTask.finishCompletion 当我尝试在内部存储中打开文件时我不知道如何处理如果你有一些建议请帮助我

我的代码：

      protected String doInBackground(Hashtable<String,String>... params) {
       Hashtable ht=params[0];

       String json=HelperHttp.getJSONResponseFromURL(url, ht);
       System.out.println(json);

        try {
            jObj = new JSONObject(json);
              ObjectOutput out = new ObjectOutputStream(new FileOutputStream(new File(getCacheDir(),"")+"cacheFile.srl"));
                out.writeObject(jObj.toString() );
                out.close();
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }



       if(json!=null) {try {
          ObjectInputStream in = new ObjectInputStream(new FileInputStream(new File(new File(getCacheDir(),"")+"cacheFile.srl")));
           JSONObject jsonObject;
        try {
            jsonObject = (JSONObject) in.readObject();
            JSONArray articles = jsonObject.getJSONArray("posts");

             for(int i = 0; i < articles.length(); i++){
                    JSONObject c = articles.getJSONObject(i);

                    // Storing each json item in variable
                    AO=c.getJSONObject("post");


                    String fr_titre = AO.getString("fr_titre");
                   Log.d("hhhhhhhhhh", fr_titre);

                   lista.add(fr_titre);

        }
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
           in.close(); 


         } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ObjectStreamException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
    } else{
        return "Invalid Company Id";
       }

       return "SUCCESS";
      }

堆栈跟踪：

04-11 11:52:04.694: E/AndroidRuntime(1026): FATAL EXCEPTION: AsyncTask #1
04-11 11:52:04.694: E/AndroidRuntime(1026): java.lang.RuntimeException: An error occured while executing doInBackground()
04-11 11:52:04.694: E/AndroidRuntime(1026):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.util.concurrent.FutureTask.run(FutureTask.java:239)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.lang.Thread.run(Thread.java:856)
04-11 11:52:04.694: E/AndroidRuntime(1026): Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to org.json.JSONObject
04-11 11:52:04.694: E/AndroidRuntime(1026):     at com.cgi.activity.ActivityListNews$GetDeptAyncTask.doInBackground(ActivityListNews.java:81)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at com.cgi.activity.ActivityListNews$GetDeptAyncTask.doInBackground(ActivityListNews.java:1)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
04-11 11:52:04.694: E/AndroidRuntime(1026):     at java.util.concurrent.FutureTask.run(FutureTask.java:234)
04-11 11:52:04.694: E/AndroidRuntime(1026):     ... 3 more
4

1 回答 1

2

你写一个字符串：

out.writeObject(jObj.toString() );

但是当您阅读它时将其转换为 JSONObject ：

jsonObject = (JSONObject) in.readObject();

您可以阅读它，将其转换为字符串，然后解析它：

jsonObject = new JSONObject((String) in.readObject());
于 2013-04-11T15:46:38.627 回答