Dodawanie firmy

package com.example.cargoalgps;

import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

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

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class addCompany extends AppCompatActivity {

    TextView text; //wyslano/nie wyslano email pomyslnie
    EditText email; //textbox z mailem
    ProgressDialog pd; //pop up z wysylanie wiadomosci
    Button button2; //przycisk rejestruj

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_company); //tutaj zmien activity_register na nazwe klasy layoutu

        //jak wyzej
        button2 = (Button) findViewById(R.id.buttonCheckEmail);
        text = findViewById(R.id.textCorrectOrNot);
        email = findViewById(R.id.inputEmail);
        setTitle("Dodawanie firmy");

        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Pattern pattern = Pattern.compile("[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}");
                Matcher mat = pattern.matcher(email.getText());

                if(mat.matches()){
                    new JsonTask().execute("http://cargoalgps.cba.pl/api/rejestracja/create.php");
                }else{
                    text.setText("Podano adres email w zlym formacie");
                }

            }
        });
    }

    private class JsonTask extends AsyncTask<String, String, String> {

        protected void onPreExecute() {
            super.onPreExecute();

            pd = new ProgressDialog(addCompany.this);
            pd.setMessage("Wysylanie wiadomosci...");
            pd.setCancelable(false);
            pd.show();
        }

        protected String doInBackground(String... params) {


            HttpURLConnection conn = null;
            BufferedReader reader = null;

            try {
                URL url = new URL(params[0]);
                conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("POST");
                conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
                conn.setRequestProperty("Accept", "application/json");
                conn.setDoOutput(true);
                conn.setDoInput(true);

                JSONObject jsonParam = new JSONObject();
                jsonParam.put("email", email.getText());
                jsonParam.put("ranga", "wlasciciel");
                jsonParam.put("wlasciciel", "self");

                Log.i("JSON", jsonParam.toString());
                DataOutputStream os = new DataOutputStream(conn.getOutputStream());
                //os.writeBytes(URLEncoder.encode(jsonParam.toString(), "UTF-8"));
                os.writeBytes(jsonParam.toString());

                os.flush();
                os.close();



                if (200 <= conn.getResponseCode() && conn.getResponseCode() <= 299) {
                    reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                } else {
                    reader = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
                }
                StringBuffer buffer = new StringBuffer();
                String line = "";

                while ((line = reader.readLine()) != null) {
                    buffer.append(line + "\n");
                    Log.d("Response: ", "> " + line);   //here u ll get whole response...... :-)

                }
                return String.valueOf(conn.getResponseCode());
                // return buffer.toString();


            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            } finally {
                if (conn != null) {
                    conn.disconnect();
                }
                try {
                    if (reader != null) {
                        reader.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            if (pd.isShowing()) {
                pd.dismiss();
            }
            if (result.equals("200")) {
                text.setText("Wyslano email pomyslnie");
            } else {
                String error = "";
                if(result.equals("409")){
                    error = "Email juz istnieje";
                }else{
                    error = "Bledny email";
                }
                text.setText(error);
            }

        }
    }
}