如何將此JSON對象轉換爲字符串數組？

Question

我從一個PHP文件，互聯網上獲得此JSON對象：

{ 
"1": "bar", 
"2": "foo", 
"3": "umIar", 
"4": "shubham" 
} 

我嘗試了很多，但無法將其轉換爲String陣列。怎麼做？

我用這個JAVA代碼：

public class showNewsFeed extends AsyncTask <String, Void, String> { 
     HttpClient httpclient = new DefaultHttpClient(); 

     HttpPost httppost = new HttpPost("http://www.ludlowcastle.co.in/getNotifiedDTU/newsFeed.php"); 
     String result; 
     protected String doInBackground(String... voids){ 
      try { 
       HttpResponse response = httpclient.execute(httppost); 
       HttpEntity entity = response.getEntity(); 
       InputStream is = entity.getContent(); 
       String result = convertStreamToString(is); 
       System.out.println("String response = " + result); 
      } catch (Exception e){ 
       e.printStackTrace(); 
      } 

      return result; 
     } 
     protected void onProgressUpdate(Void...voids){ 

     } 


     protected void onPostExecute(String result){ 
      super.onPostExecute(result); 

      try { 
       JSONObject obj=new JSONObject(result); 
       Iterator iter = obj.keys(); 
       while(iter.hasNext()){ 
        String key = (String)iter.next(); 
        System.out.println(obj.getString(key)); 
       } 

       } catch (Exception e) { 
       e.printStackTrace(); 
       } 
     } 



    } 

這是logcat的：

02-18 04:58:19.412: W/System.err(1268): java.lang.NullPointerException 
02-18 04:58:19.431: W/System.err(1268):  at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116) 
02-18 04:58:19.431: W/System.err(1268):  at org.json.JSONTokener.nextValue(JSONTokener.java:94) 
02-18 04:58:19.431: W/System.err(1268):  at org.json.JSONObject.<init>(JSONObject.java:154) 
02-18 04:58:19.431: W/System.err(1268):  at org.json.JSONObject.<init>(JSONObject.java:171) 
02-18 04:58:19.431: W/System.err(1268):  at com.umair.shubham.fragment1$showNewsFeed.onPostExecute(fragment1.java:71) 
02-18 04:58:19.431: W/System.err(1268):  at com.umair.shubham.fragment1$showNewsFeed.onPostExecute(fragment1.java:1) 
02-18 04:58:19.441: W/System.err(1268):  at android.os.AsyncTask.finish(AsyncTask.java:631) 
02-18 04:58:19.441: W/System.err(1268):  at android.os.AsyncTask.access$600(AsyncTask.java:177) 
02-18 04:58:19.441: W/System.err(1268):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644) 
02-18 04:58:19.451: W/System.err(1268):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-18 04:58:19.451: W/System.err(1268):  at android.os.Looper.loop(Looper.java:137) 
02-18 04:58:19.451: W/System.err(1268):  at android.app.ActivityThread.main(ActivityThread.java:5039) 
02-18 04:58:19.451: W/System.err(1268):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-18 04:58:19.451: W/System.err(1268):  at java.lang.reflect.Method.invoke(Method.java:511) 
02-18 04:58:19.451: W/System.err(1268):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
02-18 04:58:19.461: W/System.err(1268):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
02-18 04:58:19.471: W/System.err(1268):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

嘗試此

ArrayList<String> arr=new ArrayList<String>(); 
JSONObject obj=new JSONObject(response); 
Iterator iter = obj.keys(); 
while(iter.hasNext()){ 
    String key = (String)iter.next(); 
    arr.add(obj.getString(key)); 
}