Sending JSON body through POST request in OKhttp in Android

Question

I have setting up OkHttpClient and successfully sending the GET request to the server. And also I could able to sending the POST request to the server with empty body tag.

Now, I'm trying to send the following JSON Object to the server.

{ "title": "Mr.", "first_name":"Nifras", "last_name": "", "email": "[email protected]", "contact_number": "75832366", "billing_address": "", "connected_via":"Application" }

For this I have trying to adding the OkHttpClient library class RequestBody but I fail to sending the JSON object as body of the http POST request. The following way I have try to build the body and process the post request.

OkHttpClient client = new OkHttpClient(); RequestBody body = new RequestBody() { @Override public MediaType contentType() { return ApplicationContants.JSON; } @Override public void writeTo(BufferedSink sink) throws IOException { // This is the place to add json I thought. But How could i do this } }; Request request = new Request.Builder() .url(ApplicationContants.BASE_URL + ApplicationContants.CUSTOMER_URL) .post(body) .build();

What is the way I send the JSON object to the server via POST request.

Thanks in advance.

You could simply use very popular Retrofit library for that. Using it you'll need just to create a POJO class with fields representing the JSON fields and send it as the Body of the request. — Roman Samoilenko
– Roman Samoilenko, Commented Nov 10, 2016 at 9:32

Mable John · Accepted Answer · 2016-11-10 09:44:37Z

Try this

Add Gradle depends compile 'com.squareup.okhttp3:okhttp:3.2.0'

public static JSONObject foo(String url, JSONObject json) { JSONObject jsonObjectResp = null; try { MediaType JSON = MediaType.parse("application/json; charset=utf-8"); OkHttpClient client = new OkHttpClient(); okhttp3.RequestBody body = RequestBody.create(JSON, json.toString()); okhttp3.Request request = new okhttp3.Request.Builder() .url(url) .post(body) .build(); okhttp3.Response response = client.newCall(request).execute(); String networkResp = response.body().string(); if (!networkResp.isEmpty()) { jsonObjectResp = parseJSONStringToJSONObject(networkResp); } } catch (Exception ex) { String err = String.format("{\"result\":\"false\",\"error\":\"%s\"}", ex.getMessage()); jsonObjectResp = parseJSONStringToJSONObject(err); } return jsonObjectResp; }

Parse Response

 private static JSONObject parseJSONStringToJSONObject(final String strr) { JSONObject response = null; try { response = new JSONObject(strr); } catch (Exception ex) { // Log.e("Could not parse malformed JSON: \"" + json + "\""); try { response = new JSONObject(); response.put("result", "failed"); response.put("data", strr); response.put("error", ex.getMessage()); } catch (Exception exx) { } } return response; }

I have another question for you .How to include this in retrofit ? @young

Kelevandos · Accepted Answer · 2016-11-10 09:27:26Z

Just do this:

@Override public void writeTo(BufferedSink sink) throws IOException { sink.writeUtf8(yourJsonString); }

And it should work fine :-) If I understand the documentation correctly, sink is a container into which you can write the data you want to post. The writeUtf8 method is convenience for turning the String into bytes, using the UTF-8 encoding.

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