Android HttpURLConnection code for GET and POST Methods

package com.infodat.selltis2;

import android.util.Log;

import com.infodat.selltis2.utils.Constants;
import com.infodat.selltis2.utils.Utils;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;

public class HttpWebServiceHandlerSample {

    static String response = null;


    public HttpWebServiceHandlerSample() {

    }


    /**
     * Making service call
     *
     * @url - url to make request
     * @method - http request method
     * @params - http request params
     */


    // Get Request using HttpURLConnection  Code
    public String makeGetServiceCall(String requestURL, HashMap<String, String> postDataParams) {

        InputStream inputStream = null;

        HttpURLConnection conn = null;

        String response = "";
        try {
                /* forming th java.net.URL object */


            String newRequestURL = requestURL + getQueryString(postDataParams);

            URL url = new URL(newRequestURL);
            Log.i("URL ", newRequestURL);

            conn = (HttpURLConnection) url.openConnection();

                 /* optional request header */
            conn.setRequestProperty("Content-Type", "application/json");

                /* optional request header */
            conn.setRequestProperty("Accept", "application/json");

            //  urlConnection.setConnectTimeout(100000);

                /* for Get request */
            conn.setRequestMethod("GET");

            int statusCode = conn.getResponseCode();

                /* 200 represents HTTP OK */
            if (statusCode == 200) {

                inputStream = new BufferedInputStream(conn.getInputStream());

                response = convertInputStreamToString(inputStream);


            } else {
                response = Constants.NetWorkErrorMSG;
            }

        } catch (Exception e) {
            //    Log.i("Selltis N/w Error", e.getLocalizedMessage());
            response = Constants.NetWorkErrorMSG;

        } finally {

            if (conn != null)
                conn.disconnect();
        }

        Log.i("RESPONSE", response);
        return response; // return response

    }


    // Convert all key/Value pairs to URL request parameters
    private String getQueryString(HashMap<String, String> params) throws UnsupportedEncodingException {
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for (Map.Entry<String, String> entry : params.entrySet()) {
            if (first)
                first = false;
            else
                result.append("&");

            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
        }

        return result.toString();
    }


    // convert InputStream to String
    private String convertInputStreamToString(InputStream inputStream) throws IOException {

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

        String line = "";
        String result = "";

        while ((line = bufferedReader.readLine()) != null) {
            result += line;
        }

            /* Close Stream */
        if (null != inputStream) {
            inputStream.close();
        }

        return result;
    }


    // POST Request using HttpURLConnection  Code
    public String makePostServiceCall(String requestURL, String postJosnData) {
        InputStream inputStream = null;
        URL url;
        String response = "";
        HttpURLConnection conn = null;
        try {
            url = new URL(requestURL);

            conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(10000);
            conn.setConnectTimeout(10000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);

                 /* optional request header */
            conn.setRequestProperty("Content-Type", "application/json");

                /* optional request header */
            conn.setRequestProperty("Accept", "application/json");

            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(
                    new OutputStreamWriter(os, "UTF-8"));
            writer.write(postJosnData);

            //    Log.i("POST URL", url.toString());
            //   Log.i("POST DATA", postJosnData);

            writer.flush();
            writer.close();
            os.close();
            int responseCode = conn.getResponseCode();

            if (responseCode == HttpURLConnection.HTTP_OK) {

                inputStream = new BufferedInputStream(conn.getInputStream());

                response = convertInputStreamToString(inputStream);


            } else {
                response = Utils.ServerErrorMessage;

            }
        } catch (Exception e) {

            //   Log.i("Selltis N/w Error", e.getLocalizedMessage());
            response = Utils.ServerErrorMessage;
        } finally {

            if (conn != null)
                conn.disconnect();
        }

        return response;

    }


}