Using Socket in Android

MainActivity.java

package com.example.luis.usingsocket;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import org.w3c.dom.Text;

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

public class MainActivity extends AppCompatActivity {

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

    public void buttonConnect(View view){
        EditText inputIP = (EditText) findViewById(R.id.field_ip);
        EditText inputPort = (EditText) findViewById(R.id.field_port);
        TextView text = (TextView) findViewById(R.id.text);

        String ip = inputIP.getText().toString();
        String port = inputPort.getText().toString();
        System.out.println("Porta: " + port);
        //convert for number if not null
        if(!port.equals("")){
            int numberPort = Integer.parseInt(port);
            boolean resp = connectServer(ip, numberPort);
            if(resp) {
                text.setText("Conectado");
            }else{
                text.setText("Não foi possível conectar");
            }
        }else{
            int color = Color.parseColor("#ff5959");
            inputPort.setHintTextColor(color);
            inputPort.setHint("Porta inválida");
        }
    }

    //connect witch server
    public boolean connectServer(final String IP, final int port){

        Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    //create conection
                    Socket client = new Socket(IP, port);
                }catch (IOException IOError){
                    IOError.printStackTrace();
                }

            }
        });

        thread.start();
        return true;
    }
}