Using CookieManager to Save Cookies on Android

package com.example.test;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.text.TextUtils;
import android.util.Log;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpCookie;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;

public class HttpResponsAsync extensions AsyncTask<Void, Void, String>{

    private TextView textView;
    static final String COOKIES_HEADER="Set-Cookie";
    static java.net.CookieManager msCookieManager=new java.net.CookieManager();

    private Context context = null;
    private ProgressDialog dialog = null;
    private String title;
    private String msg;

    /**
     * constructor
     */
    public HttpResponsAsync (Context context) {
        super();
        this.context=context;
    }

    @ Override
    protected void onPreExecute() {
        super.onPreExecute();
        // doInBackground preprocessing
    }

    @ Override
    Protected String doInBackground (Void...params) {
        String readSt = null;


        HttpURLConnection con=null;
        URL url = null;
        String urlSt="https://URL.com";

        try{
            // Creating URLs
            url = new URL(urlSt);
            // Creating HttpURLConnection Objects for Connections
            con=(HttpURLConnection) url.openConnection();
            if(msCookieManager.getCookieStore().getCookies().size()>0){
                // While joining the Cookies, use', 'or'; 'as needed. Most of the server are using';'
                con.setRequestProperty("Cookie",
                    TextUtils.join(";", msCookieManager.getCookieStore().getCookies()));
            }

            // Configuring Request Methods
            con.setRequestMethod("POST");
            // Configuring Not Automatically Allow Redirects
            con.setInstanceFollowRedirects (false);
            // True if reading data from URL connection
            con.setDoInput(true);
            // True to write data to URL connection
            con.setDoOutput(true);

            // CONNECTION
            con.connect();
            Map<String, List<String>>headerFields=con.getHeaderFields();
            List<String>cookiesHeader=headerFields.get(COOKIES_HEADER);

            if(cookiesHeader!=null){
                for (String cookie: cookiesHeader) {
                    msCookieManager.getCookieStore().add(null, HttpCookie.parse(cookie).get(0));
                }
            }

            InputStream in=con.getInputStream();
            readSt = readInputStream(in);


        } catch(MalformedURLExceptione){
            e.printStackTrace();
        } catch(IOExceptione){
            e.printStackTrace();
        }

        return readSt;
    }

    public String readInputStream (InputStream in) flows IOException,
    UnsupportedEncodingException {
        StringBuffersb = new StringBuffer();
        String st="";

        BufferedReader br = new BufferedReader (new InputStreamReader(in, "UTF-8"));
        while((st=br.readLine())!=null){
            sb.append(st);
        }
        try { in.close();
        } catch(Exceptione){
            e.printStackTrace();
        }

        return sb.toString();
    }

    @ Override
    protected void onPostExecute(String result){
        super.onPostExecute(result);
        // doInBackground Postprocessing
        JSONArray jsonArray = null;
        try{
            // To retrieve an array
            jsonArray = new JSONObject(result).getJSONArray("data");
            int count = jsonArray.length();
            JSONObject[]bookObject=new JSONObject[count];
            for(inti=0;i<count;i++){
                bookObject[i] = jsonArray.getJSONObject(i);
                // For String type:
                String st = bookObject[i].getString("type");
            }
        } catch(JSONExceptione){
        }
    }

}