How to get JSON from HTTP to Java object on Android

Question

I want to get JSON from HTTP and parse it into an object in my Android app. I've tried Spring Framework with AsyncTask, but everyone says it's deprecated.

So how can I make this happen, or does someone have a link to a tutorial for me?

refer this http://stackoverflow.com/questions/18073849/get-json-object-from-a-http-response — sasikumar, Aug 01 '15 at 06:10

score 2 · Answer 1 · answered Aug 01 '15 at 08:12

I would extend Denis proposal with this article and when to use given library.

First of all article from few months ago JSON Libraries Performance Comparison

If you dont wanna read:

Use Jackson library for big JSON data
Use GSON for small JSON data ( Most of the requests are rather small )

score 1 · Answer 2 · answered Aug 01 '15 at 06:15

refer this, it will give you response in String, you can convert it in jsonObject

public static String postUrlResponse(String url,List<NameValuePair> urlParameters) 
{
    try
    {
        System.out.println("URL : " + url);
        HttpParams httpParams = new BasicHttpParams();
        HttpClient client = new DefaultHttpClient(httpParams);
        HttpPost post = new HttpPost(url);

        post.setEntity(new UrlEncodedFormEntity(urlParameters));

        HttpResponse response = client.execute(post);
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("Post parameters : " + post.getEntity());
        System.out.println("Response Code : " + 
                response.getStatusLine().getStatusCode());

        BufferedReader rd = new BufferedReader(
                new InputStreamReader(response.getEntity().getContent()));

        StringBuffer result = new StringBuffer();
        String line = "";
        while ((line = rd.readLine()) != null) {
            result.append(line);
        }
        return result.toString();
    }
    catch(Exception e)
    {
        e.printStackTrace();
        return e.toString();
    }
}

score 1 · Answer 3 · answered Aug 01 '15 at 06:56

1

Best library for parsing JSON is Jackson.
Here is very helpful tutorials about this. According to this article you can see Jackson is the fastest

answered Aug 01 '15 at 06:56

Dennis Zinkovski

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score 0 · Answer 4 · answered Aug 01 '15 at 08:32

Answer to my own question thanks everyone.

public static List<Events> getEvents() {

    List<Events> ret = new ArrayList<Events>();
    ProgressDialog pr = new ProgressDialog(context);

    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);


    // YOUR URL GOES HERE
    String getUrl = "http://example.nl/CALL.ashx?Onderdeel=Feeds&AuthToken=" + WWIBCore.AuthToken;
    HttpClient http = new DefaultHttpClient();

    HttpResponse response = null;
    HttpGet getMethod = new HttpGet(getUrl);
    try {
        response = http.execute(getMethod);

        // CONVERT RESPONSE TO STRING
        String result = EntityUtils.toString(response.getEntity());

        // CONVERT RESPONSE STRING TO JSON ARRAY
        JSONArray ja = new JSONArray(result);

        // ITERATE THROUGH AND RETRIEVE EVENTS FIELDS
        int n = ja.length();

        for (int i = 0; i < n; i++) {

            // GET INDIVIDUAL JSON OBJECT FROM JSON ARRAY
            JSONObject jo = ja.getJSONObject(i);

            // CONVERT DATA FIELDS TO EVENTS OBJECT
            Events e = new Events();
            e.setNaam(jo.getString(("Naam")));
            e.setContent(jo.getString("Content"));

            ret.add(e);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    pr.dismiss();
    return ret;
}

How to get JSON from HTTP to Java object on Android

4 Answers4