JSONException: End of input at character 0

Question

i am trying to get JSON values from server. I don't know what is wrong with my code. I am using AsyncTask and here is my code in doInBackground

Code:

@Override
    protected Void doInBackground(List<String>... articlesRec) {
        for (List<String> articlesPostValue : articlesRec) {
            event = articlesPostValue.get(0);
            category = articlesPostValue.get(1);
            paged = articlesPostValue.get(2);
            deviceID = articlesPostValue.get(3);
        }

        List<NameValuePair> articlesPostValues = new ArrayList<NameValuePair>();
        articlesPostValues.add(new BasicNameValuePair("_event", event));
        articlesPostValues.add(new BasicNameValuePair("cat", category));
        articlesPostValues.add(new BasicNameValuePair("paged", paged));
        articlesPostValues.add(new BasicNameValuePair("_deviceID", deviceID));

        HttpClient hc = new DefaultHttpClient();
        HttpPost hp = new HttpPost(AutoLifeConstants.BASE_URL);

        try {
            hp.setEntity(new UrlEncodedFormEntity(articlesPostValues));

            // Execute HTTP Post Request
            HttpResponse response = hc.execute(hp);

            String result = EntityUtils.toString(response.getEntity());
            String jsontext = new String(result);

            JSONObject entries = new JSONObject(jsontext);

            this.response = entries.getString("response_code");

            try {
                String totalPageStr = entries.getString("total_pages");
                totalPage = Integer.valueOf(totalPageStr);
            } catch (Exception e) {

            }

            JSONArray postListArray = entries.getJSONArray("posts_list");

            for (int i = 0; i < postListArray.length(); i++) {
                JSONObject postListObj = postListArray.getJSONObject(i);

                String articlesTitle = postListObj.getString("title");
                String dateTime = postListObj.getString("date");
                String articlesImage = postListObj.getString("feature_image");
                String descrition = postListObj.getString("content");
                String fullDescription = postListObj.getString("full_content");

                articlesNewesttitle.add(articlesTitle);
                articlesNewestPostTime.add(dateTime);
                articlesNewestPostImage.add(articlesImage);
                articlesNewestPostDescription.add(descrition);
                postFullDescription.add(fullDescription);

                Log.d("Title",articlesTitle);
            }

        } catch (Exception e) {
            Log.e("catched error","Exceptin occured");
            e.printStackTrace();
        }

        return null;
    }

And here is catch(Exception e) on logcat

    06-19 13:22:32.229: W/System.err(19647): org.json.JSONException: End of input at character 0 of 
06-19 13:22:32.264: W/System.err(19647):    at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
06-19 13:22:32.265: W/System.err(19647):    at org.json.JSONTokener.nextValue(JSONTokener.java:97)
06-19 13:22:32.268: W/System.err(19647):    at org.json.JSONObject.<init>(JSONObject.java:154)
06-19 13:22:32.269: W/System.err(19647):    at org.json.JSONObject.<init>(JSONObject.java:171)
06-19 13:22:32.270: W/System.err(19647):    at np.com.autolife.adapters.NewsActivity$Get_postlist.doInBackground(NewsActivity.java:169)
06-19 13:22:32.272: W/System.err(19647):    at np.com.autolife.adapters.NewsActivity$Get_postlist.doInBackground(NewsActivity.java:1)
06-19 13:22:32.272: W/System.err(19647):    at android.os.AsyncTask$2.call(AsyncTask.java:287)
06-19 13:22:32.273: W/System.err(19647):    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
06-19 13:22:32.273: W/System.err(19647):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
06-19 13:22:32.274: W/System.err(19647):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
06-19 13:22:32.274: W/System.err(19647):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
06-19 13:22:32.281: W/System.err(19647):    at java.lang.Thread.run(Thread.java:838)

Here is JSON format

    {
    "get": [],
    "post": {
        "_event": "get_posts",
        "_deviceID": "490154203237518",
        "cat": "2",
        "paged": "1"
    },
    "response_code": "success",
    "posts_total": 8,
    "total_pages": 2,
    "paged": 1,
    "posts_list": [
        {
            "ID": 9168,
            "title": "MAXXIS Introduce Trepador Tires",
            "content": "",
            "full_content": "http:xxxxxx",
            "date": "June 13, 2014",
            "category": "All News & Events, Local News",
            "feature_image": "http:xxxxx.jpg",
            "feature_image_thumb": "http:xxxx.jpg",
            "author": "AutoLife Team"
        },
        {
            "ID": 9162,
            "title": "5 Year Warranty On All Hero Motorcycles",
            "content": "",
            "full_content": "http://xxxxx",
            "date": "June 13, 2014",
            "category": "All News & Events, Local News",
            "feature_image": "http://xxxxxx.jpg",
            "feature_image_thumb": "http://xxxx.jpg",
            "author": "AutoLife Team"
        },
        {
            "ID": 8130,
            "title": "All new 11th Generation Toyota Corolla Launched",
            "content": "",
            "full_content": "http://xxxxxx",
            "date": "May 1, 2014",
            "category": "Events & Schemes",
            "feature_image": "http://xxxxxx.png",
            "feature_image_thumb": "http://xxxxxx.png",
            "author": "supervisor"
        },
        {
            "ID": 9178,
            "title": "New Launches From TATA Motors : TATA Nano Twist",
            "content": "",
            "full_content": "http://xxxxxx",
            "date": "February 15, 2014",
            "category": "All News & Events, International News",
            "feature_image": "http://xxxxx.jpg",
            "feature_image_thumb": "xxxxxxx.jpg",
            "author": "AutoLife Team"
        },
        {
            "ID": 9175,
            "title": "New Launches From TATA Motors : Revotron Engine",
            "content": "",
            "full_content": "xxxxxxx",
            "date": "February 15, 2014",
            "category": "All News & Events, International News",
            "feature_image": "http://xxxxx.jpg",
            "feature_image_thumb": "http://xxxxx.jpg",
            "author": "AutoLife Team"
        }
    ]
}

This is not the problem, but why are you doing this: String jsontext = new String(result); — Henry
– Henry, Commented Jun 19, 2014 at 8:13
@GiruBhai line 169 is ' JSONObject entries = new JSONObject(jsontext); ' . — user3751280
– user3751280, Commented Jun 19, 2014 at 8:21

Remario · Accepted Answer · 2017-07-09 03:23:23Z

6

The reason why you get this error is because you attempt to access the response more than once. For example lets lets say you do a log with the response, then create a json object with the same response object, it will trigger this one time acees error.

answered Jul 9, 2017 at 3:23

Remario

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2 Comments

Noor Hossain Over a year ago

This is an Actual Hidden point !

Jogendra Gouda Over a year ago

correct Answer!

Giru Bhai · Accepted Answer · 2014-06-19 08:40:10Z

2

You are probably getting a blank response. Its not null but the jsontext is empty. So you are getting this error and not a Nullpointer exception

Are you sending right parameters to server.Also Check url respond to POST requests or not.

answered Jun 19, 2014 at 8:40

Giru Bhai

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3 Comments

greenapps Over a year ago

That would be unbelievable as the OP is posting the response one would think.

Giru Bhai Over a year ago

@user3751280 imeplement it using GET

user4380006 Over a year ago

@GiruBhai i have same problem..and i am sending right parameters yet getting error

Thiago · Accepted Answer · 2020-08-17 13:43:42Z

0

Check if the response is not empty before process the JSON:

if (response.success()) {
    if (response.getData() == null) {
        return null;
    } else if (response.getData().length() <= 0){
        return null;
    }

    try {
        // Logic

answered Aug 17, 2020 at 13:43

Thiago

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