服务器套接字在android中没有正确响应

Question

In my project server socket doesn't respond properly in android. I don't know what's wrong in that? My server side code is stuck in serversocket.accept().

In manifest file i have given internet and foreground service permission. I am beginner and I am trying this for past 3 days and I have spent too much time in that.

This is my server side code:

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.DataInputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;



public class MainActivity extends AppCompatActivity {
    Socket s;
    ServerSocket serverSocket;
    TextView textView;
    Button button;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView=findViewById(R.id.texview);
        button=findViewById(R.id.buttonstart);
        connect();


    }

    public void connect(){
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                
                button.setEnabled(false);
                Thread thread=new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            
                            serverSocket=new ServerSocket(8888);
                            
                            while (true){
                               
                                s=serverSocket.accept();

                               
                                DataInputStream datainput=new DataInputStream(s.getInputStream());
                                String txt=(String)datainput.readUTF();
                                textView.setText(txt);

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

            }
        });
    }

    public void stop(View view) {
        try {
            s.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

And this is client side code for testing in java format

import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.Socket;
import java.util.Scanner;

public class client {
    public static void main(String[] args) {
        try {
            Socket s=new Socket("192.168.43.24", 9999);//for bind by ip & port 1
            DataOutputStream m=new DataOutputStream(s.getOutputStream());// for send msg
            Scanner scan= new Scanner(System.in);
            while(true){
                System.out.print("Type you msg here :- ");
                String send=scan.nextLine();
                m.writeUTF(send);
                m.flush();
            }
        } catch (Exception e) {
            System.out.println(e);//print error
            //TODO: handle exception
        }
    }
    
}

Answer 1

Confirm your client is connecting to the correct IP and port. For starters, your server is set to port 8888, but your client is attempting to connect to server port 9999?