我如何在Android的屏幕上写出我在UDP包中得到的内容？

import android.os.Bundle;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import java.net.DatagramPacket;
import java.net.DatagramSocket;

public class MainActivity extends AppCompatActivity {
    private TextView udpTextView;

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

        udpTextView = findViewById(R.id.udpTextView);

        // 创建UDP套接字并监听指定端口
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    DatagramSocket socket = new DatagramSocket(8888);
                    byte[] buffer = new byte[1024];
                    DatagramPacket packet = new DatagramPacket(buffer, buffer.length);

                    while (true) {
                        // 接收UDP包
                        socket.receive(packet);

                        // 从UDP包中提取数据
                        String data = new String(packet.getData(), 0, packet.getLength());

                        // 在屏幕上显示UDP包中的内容
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                udpTextView.setText(data);
                            }
                        });
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }
}