TCP Connection via Java Sockets /Client-Side implementaion

Android Client-Side.java

/**
 * Created by Bahaa on 4/7/2018.
 */


package com.example.bahaa.clientapp;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Base64;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;


public class ClientActivity extends AppCompatActivity {
    private ImageView clientImage;
    private TextView localIP, portNumber, bytesDecoded, responseTime;
    private Socket clientSocket;
    private DataInputStream dataInputStream;
    private DataOutputStream dataOutputStream;
    private String IP_ADDRESS = "192.168.1.10";
    private int PORT_NUMBER = 13267;
    private String base64Code;
    private byte[] decodedString;
    private Bitmap bitmap;
    private long INITIAL_TIME = 0;
    private long ELAPSED_TIME = 0;
    


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_client);

        clientImage = (ImageView) findViewById(R.id.client_img);
        localIP = (TextView)findViewById(R.id.ip_tv);
        portNumber = (TextView)findViewById(R.id.port_tv);
        bytesDecoded = (TextView)findViewById(R.id.bytes_tv);
        responseTime = (TextView)findViewById(R.id.time_tv);

        INITIAL_TIME = System.currentTimeMillis();

        new ReceiverTask().execute();


    }


    @Override
    protected void onDestroy() {
        super.onDestroy();

        if (clientSocket != null) {
            try {
                clientSocket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        if (dataInputStream != null) {
            try {
                dataInputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        if (dataOutputStream != null) {
            try {
               dataOutputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    //Receiving Data in Background..
    class ReceiverTask extends AsyncTask<Void, Integer, String> {
        @Override
        protected String doInBackground(Void... params) {


            try {

                clientSocket = new Socket(IP_ADDRESS, PORT_NUMBER);


                dataOutputStream = new DataOutputStream(clientSocket.getOutputStream());
                dataInputStream = new DataInputStream(clientSocket.getInputStream());
                
                base64Code = dataInputStream.readUTF();

                Log.i("Client", base64Code);

                //NO_WRAP:: Removes All line breakers from received String to avoid Decoding Corruption
                decodedString = Base64.decode(base64Code, Base64.NO_WRAP);

                //Converting the Decoded String back into image. Bitmap First!
                bitmap = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);


            } catch (IOException e) {
                e.printStackTrace();
            }


            return "Task Completed";
        }


        @Override
        protected void onPostExecute(String result) {
            //Rescale Bitmap to fit the imageView
            bitmap = Bitmap.createScaledBitmap(bitmap, 600, 600, true);
            clientImage.setImageBitmap(bitmap);

            localIP.setText(IP_ADDRESS);
            portNumber.setText(String.valueOf(PORT_NUMBER));
            bytesDecoded.setText(String.valueOf(base64Code.length()) + " Bytes");

            ELAPSED_TIME = System.currentTimeMillis();

            responseTime.setText(String.valueOf(ELAPSED_TIME - INITIAL_TIME) + "ms");


            Log.i("Client", "Leaving PostExecute..");

        }

        @Override
        protected void onProgressUpdate(Integer... values) {


        }
    }

}