安卓域名远程桌面连接不上

import android.os.Bundle;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import com.realvnc.vncandroid.Viewer;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        String serverAddress = "192.168.1.100";
        int port = 5900;
        String password = "your_password";

        Viewer viewer = new Viewer(this);
        viewer.connect(serverAddress, port, password, new Viewer.ConnectionCallback() {
            @Override
            public void onConnected() {
                Toast.makeText(MainActivity.this, "Connected successfully", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onError(String errorMessage) {
                Toast.makeText(MainActivity.this, "Connection failed: " + errorMessage, Toast.LENGTH_SHORT).show();
            }
        });
    }
}