如何在Android应用中通过UPD套接字接收数据

import android.os.Bundle;
import android.util.Log;
import androidx.appcompat.app.AppCompatActivity;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "UDPReceiver";
    private static final int PORT = 5000;

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

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    DatagramSocket socket = new DatagramSocket(PORT);
                    byte[] buffer = new byte[1024];
                    DatagramPacket packet = new DatagramPacket(buffer, buffer.length);

                    while (true) {
                        socket.receive(packet);
                        String received = new String(packet.getData(), 0, packet.getLength());
                        Log.d(TAG, "Received: " + received);
                    }
                } catch (SocketException e) {
                    Log.e(TAG, "SocketException: " + e.getMessage());
                } catch (IOException e) {
                    Log.e(TAG, "IOException: " + e.getMessage());
                }
            }
        }).start();
    }
}

if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_NETWORK_STATE) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_NETWORK_STATE}, REQUEST_CODE);
}