Kotlin使用OKHttp以及Gson

1：导入依赖包：

  implementation 'com.squareup.okhttp3:okhttp:3.10.0'
   implementation 'com.google.code.gson:gson:2.8.5'

2：构建连接：这里使用Websocket

 fun connect() {
        var echoWebSocketListener: EchoWebSocketListener1 = EchoWebSocketListener1()
       var request: Request = Request.Builder().url("ws://ip:端口").build()
        var client = OkHttpClient()
        client.newWebSocket(request, echoWebSocketListener)
        client.dispatcher().executorService().shutdown()
    }

3.EchoWebSocketListener1继承 WebSocketListener重写各个 函数处理事务

inner class EchoWebSocketListener1 : WebSocketListener() {

        override fun onOpen(webSocket: WebSocket, response: Response) {
             isconnect = true
             sendwebSocket = webSocket
             //构建json发送服务器
          var message:com.example.remoteapp2.beans.Message = com.example.remoteapp2.beans.Message()
            var hashmap :HashMap = HashMap()
            message.setType(MessageType.BIND)
            message.setFrom("USER")
            hashmap.put("PID",pid)
            message.setContent(hashmap)
             var json = Gson().toJson(message)
             sendwebSocket!!.send(json)

        }

        override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
            var messageO = Message.obtain()
          
        }

        override fun onClosing(webSocket: WebSocket, code: Int, reason: String) {
         
        }

        override fun onMessage(webSocket: WebSocket, text: String) {    
        //获得服务器发送的json消息，转为对应的的message对象
   val uu: com.example.remoteapp2.beans.Message? =
                     Gson().fromJson(text, com.example.remoteapp2.beans.Message::class.java)
                     
        }
        override fun onMessage(webSocket: WebSocket, bytes: ByteString) {
        }

        override fun onClosed(webSocket: WebSocket, code: Int, reason: String) {
         
        }

    }