如何在android中检查signalr hubconnection是否在线？

import microsoft.aspnet.signalr.client.hubs.HubConnection;
import microsoft.aspnet.signalr.client.hubs.HubConnectionState;
import microsoft.aspnet.signalr.client.hubs.HubConnectionStateChangeListener;

public class MainActivity extends AppCompatActivity {

    private HubConnection hubConnection;

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

        // 创建HubConnection对象
        hubConnection = new HubConnection("http://your-signalr-server-url");

        // 设置连接状态监听器
        hubConnection.stateChanged(new HubConnectionStateChangeListener() {
            @Override
            public void stateChanged(HubConnectionState newState, HubConnectionState oldState) {
                // 处理连接状态变化
                if (newState == HubConnectionState.CONNECTED) {
                    // HubConnection在线
                    Log.d("SignalR", "HubConnection在线");
                } else if (newState == HubConnectionState.DISCONNECTED) {
                    // HubConnection离线
                    Log.d("SignalR", "HubConnection离线");
                }
            }
        });

        // 连接到SignalR服务器
        hubConnection.start();
    }
}