How to use OKHTTP to make a post request?

Question

I read some examples which are posting jsons to the server.

some one says :

OkHttp is an implementation of the HttpUrlConnection interface p

Answer 1

 public static JSONObject doPostRequestWithSingleFile(String url,HashMap data, File file,String fileParam) {

        try {
            final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");

            RequestBody requestBody;
            MultipartBuilder mBuilder = new MultipartBuilder().type(MultipartBuilder.FORM);

            for (String key : data.keySet()) {
                String value = data.get(key);
                Utility.printLog("Key Values", key + "-----------------" + value);

                mBuilder.addFormDataPart(key, value);

            }
            if(file!=null) {
                Log.e("File Name", file.getName() + "===========");
                if (file.exists()) {
                    mBuilder.addFormDataPart(fileParam, file.getName(), RequestBody.create(MEDIA_TYPE_PNG, file));
                }
            }
            requestBody = mBuilder.build();
            Request request = new Request.Builder()
                    .url(url)
                    .post(requestBody)
                    .build();

            OkHttpClient client = new OkHttpClient();
            Response response = client.newCall(request).execute();
            String result=response.body().string();
            Utility.printLog("Response",result+"");
            return new JSONObject(result);

        } catch (UnknownHostException | UnsupportedEncodingException e) {
            Log.e(TAG, "Error: " + e.getLocalizedMessage());
            JSONObject jsonObject=new JSONObject();

            try {
                jsonObject.put("status","false");
                jsonObject.put("message",e.getLocalizedMessage());
            } catch (JSONException e1) {
                e1.printStackTrace();
            }
        } catch (Exception e) {
            Log.e(TAG, "Other Error: " + e.getMessage());
            JSONObject jsonObject=new JSONObject();

            try {
                jsonObject.put("status","false");
                jsonObject.put("message",e.getLocalizedMessage());
            } catch (JSONException e1) {
                e1.printStackTrace();
            }
        }
        return null;
    }
    public static JSONObject doGetRequest(HashMap param,String url) {
        JSONObject result = null;
        String response;
        Set keys = param.keySet();

        int count = 0;
        for (Iterator i = keys.iterator(); i.hasNext(); ) {
            count++;
            String key = (String) i.next();
            String value = (String) param.get(key);
            if (count == param.size()) {
                Log.e("Key",key+"");
                Log.e("Value",value+"");
                url += key + "=" + URLEncoder.encode(value);

            } else {
                Log.e("Key",key+"");
                Log.e("Value",value+"");

                url += key + "=" + URLEncoder.encode(value) + "&";
            }

        }
/*
        try {
            url=  URLEncoder.encode(url, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }*/
        Log.e("URL", url);
        OkHttpClient client = new OkHttpClient();

        Request request = new Request.Builder()
                .url(url)
                .build();
        Response responseClient = null;
        try {


            responseClient = client.newCall(request).execute();
            response = responseClient.body().string();
            result = new JSONObject(response);
            Log.e("response", response+"==============");
        } catch (Exception e) {
            JSONObject jsonObject=new JSONObject();

            try {
                jsonObject.put("status","false");
                jsonObject.put("message",e.getLocalizedMessage());
                return  jsonObject;
            } catch (JSONException e1) {
                e1.printStackTrace();
            }
            e.printStackTrace();
        }

        return result;

    }