Android appとパソコンwifi通信

コンピュータ上のjavaプログラム

package hello;
import java.util.Arrays;
import java.io.*;
import java.net.*;
import java.util.Scanner;


public class Server{
	public static void main(String[] args)throws IOException{
		ServerSocket ss=new ServerSocket(30001);
		while(true){		//           
			//System.out.println("1");
			Socket s=ss.accept();
			BufferedReader br=new BufferedReader(new InputStreamReader((s.getInputStream())));
            String line=br.readLine();
            System.out.println(line);
            br.close();
            s.close();
		}
	}
	
}

androidコード:
Edittextの文字列をコンピュータに転送

public class MainActivity extends AppCompatActivity {
    //private Button mybu;
    private  EditText edit;
    public void send1(View view) throws IOException {
        new Thread(){
            @Override
            public void run(){
                try {
                    //  wifi ip  
                    String host = "192.168.23.1";  //       IP  
                    int port = 30001;   //              
                    //        
                    Socket client = new Socket(host, port);
                    edit =(EditText) findViewById(R.id.editView);
                    String ls=edit.getText().toString();
                    OutputStream os=client.getOutputStream();
                    os.write(ls.getBytes("utf-8"));
                    os.close();
                    client.close();
                }
                catch (IOException e){
                    e.printStackTrace();
                }
            }

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