我正在使用okhttp库连接我的本地WebSocket服务器（android应用程序）。

val request = Request.Builder().url("ws://localhost:3334/").build()
    val wsClient = OkHttpClient().newWebSocket(request, webSocketListener)
    Logger.log("WebSocketHandler", "${serialiser.toJson(wsClient.request())}")

和网络套接字侦听器

val webSocketListener = object : WebSocketListener() {
      override fun onOpen(webSocket: WebSocket, response: Response) {
         Logger.i("WebSocketListener_onOpen", "Response: ${serialiser.toJson(response)}")
    }

    override fun onMessage(webSocket: WebSocket, text: String) {
        Logger.i("WebSocketListener_onMessage", "text: $text")
    }

    override fun onMessage(webSocket: WebSocket,
                           bytes: ByteString) {
        Logger.i("WebSocketListener_onMessage", "text: ${serialiser.toJson(bytes)}")
    }

    override fun onClosing(webSocket: WebSocket,
                           code: Int, reason: String) {
        Logger.i("WebSocketListener_onClosing", "reason: $reason, code: $code")
    }

    override fun onClosed(webSocket: WebSocket,
                          code: Int, reason: String) {
        Logger.i("WebSocketListener_onClosed", "reason: $reason, code: $code")
    }

    override fun onFailure(webSocket: WebSocket,
                           throwable:Throwable,
                           response: Response?) {
        Logger.i("WebSocketListener_onFailure", "Response: ${serialiser.toJson(throwable)}")
    }
}

但是，当我尝试运行应用程序时，连接建立失败并显示日志

[socket]:check permission begin!
W/System: ClassLoader referenced unknown path: system/framework/mediatek-cta.jar
I/System.out: [socket] e:java.lang.ClassNotFoundException: com.mediatek.cta.CtaUtils

// throwable object
{
    "cause": {
        "cause": {
            "errno": 111,
            "stackTrace": [],
            "suppressedExceptions": []
        },
        "detailMessage": "failed to connect to localhost/127.0.0.1 (port 3334) from /127.0.0.1 (port 49040) after 10000ms: isConnected failed: ECONNREFUSED (Connection refused)",
        "stackTrace": [],
        "suppressedExceptions": []
    },
    "detailMessage": "Failed to connect to localhost/127.0.0.1:3334",
    "stackTrace": [],
    "suppressedExceptions": []
}

onFailure甚至在建立连接之前就被调用了。WebSocket服务器工作正常（用nodeJS客户端单独测试）
我无法得到正确的错误信息。有人能帮我吗