在多个活动中使用Runnable的UDP接收器: android studio

public class UdpReceiver implements Runnable {
    private DatagramSocket socket;
    private boolean isRunning;
    private static final int BUFFER_SIZE = 1024;

    public UdpReceiver() throws SocketException {
        socket = new DatagramSocket(8888); // 指定接收端口号
        isRunning = true;
    }

    @Override
    public void run() {
        byte[] buffer = new byte[BUFFER_SIZE];
        DatagramPacket packet = new DatagramPacket(buffer, BUFFER_SIZE);
        while (isRunning) {
            try {
                socket.receive(packet); // 接收数据包
                String message = new String(packet.getData(), 0, packet.getLength());
                // 处理接收到的数据
                // ...
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        socket.close();
    }

    public void stop() {
        isRunning = false;
    }
}

public class MainActivity extends AppCompatActivity {
    private UdpReceiver udpReceiver;
    private Thread receiverThread;

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

        try {
            udpReceiver = new UdpReceiver();
            receiverThread = new Thread(udpReceiver);
            receiverThread.start();
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        udpReceiver.stop();
        receiverThread.interrupt();
    }
}