获取json在localhost和一些网站上有效，但在我的真实服务器上不起作用

我有一个从服务器（在线）获取信息的应用程序，我的计算机（localhost）中有该网站的版本，

应用程序在localhost上工作，可以获得json，但我无法访问服务器上的网站

新的HttpAsyncTask（）.execute（"http://alarbaeen.com/app/?a=gallery&b＝图像&c=新&d=1"）；

HttpAsyncTask类：

private class HttpAsyncTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... urls) {

        return GET(urls[0]);
    }
    // onPostExecute displays the results of the AsyncTask.
    @Override
    protected void onPostExecute(String result) {
        Toast.makeText(getBaseContext(), "Received!", Toast.LENGTH_LONG).show();


        try {
            JSONObject json = new JSONObject(result);
            etResponse.setText(json.toString(1));
        } catch (Exception e) {
            // TODO: handle exception
        }
   }
}
  public static String GET(String url){
        InputStream inputStream = null;
        String result = "";
        try {
            // create HttpClient
            HttpClient httpclient = new DefaultHttpClient();
            // make GET request to the given URL
            HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
            // receive response as inputStream
            inputStream = httpResponse.getEntity().getContent();
            // convert inputstream to string
            if(inputStream != null)
                result = convertInputStreamToString(inputStream);
            else
                result = "Did not work!";
        } catch (Exception e) 
        {
        }
        return result;
    }

这些是错误：

 03-05 12:24:32.735: E/AndroidRuntime(5859): FATAL EXCEPTION: AsyncTask #1
03-05 12:24:32.735: E/AndroidRuntime(5859): Process: com.example.testjsons22, PID: 5859
03-05 12:24:32.735: E/AndroidRuntime(5859): java.lang.RuntimeException: An error occured while executing doInBackground()
03-05 12:24:32.735: E/AndroidRuntime(5859):     at android.os.AsyncTask$3.done(AsyncTask.java:300)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.util.concurrent.FutureTask.run(FutureTask.java:242)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.lang.Thread.run(Thread.java:841)
03-05 12:24:32.735: E/AndroidRuntime(5859): Caused by: java.lang.NullPointerException: println needs a message
03-05 12:24:32.735: E/AndroidRuntime(5859):     at android.util.Log.println_native(Native Method)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at android.util.Log.i(Log.java:160)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at com.example.testjsons22.MainActivity.GET(MainActivity.java:77)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at com.example.testjsons22.MainActivity$HttpAsyncTask.doInBackground(MainActivity.java:108)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at com.example.testjsons22.MainActivity$HttpAsyncTask.doInBackground(MainActivity.java:1)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at android.os.AsyncTask$2.call(AsyncTask.java:288)
03-05 12:24:32.735: E/AndroidRuntime(5859):     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
03-05 12:24:32.735: E/AndroidRuntime(5859):     ... 4 more