如何檢查WebSocket是否已連接

Question

我使用KOUSH庫創建了一個Websocket服務類https://github.com/koush/AndroidAsync#can-also-create-web-sockets

現在我想檢查Websocket是否從我的mainActivity連接到我的服務器。 你知道我怎么檢查這個嗎？ 謝謝

AsyncHttpClient.getDefaultInstance().websocket(get, "my-protocol", new WebSocketConnectCallback() {
    @Override
    public void onCompleted(Exception ex, WebSocket webSocket) {
        if (ex != null) {
            ex.printStackTrace();
            return;
        }
        webSocket.send("a string");
        webSocket.send(new byte[10]);
        webSocket.setStringCallback(new StringCallback() {
            public void onStringAvailable(String s) {
                System.out.println("I got a string: " + s);
            }
        });
        webSocket.setDataCallback(new DataCallback() {
            public void onDataAvailable(ByteBufferList byteBufferList) {
                System.out.println("I got some bytes!");
                // note that this data has been read
                byteBufferList.recycle();
            }
        });
    }
});

Answer 1

你可以這樣做：

if (mWebSocketClient.isOpen) {
         mWebSocketClient.send(jObj.toString())
} else {
   try {
         client.connectWebSocket(p0)
         mWebSocketClient.send(jObj.toString())
   } catch (e : Exception){
        Toast.makeText(p0, "not connected $e", Toast.LENGTH_LONG).show()
   }
}

Answer 2

解決方案是將此函數的結果保存到本地Websocket變量，然后檢查其狀態：

WebSocket webSocket=null;
try {
    webSocket=AsyncHttpClient.getDefaultInstance().websocket(get, "my-protocol", new WebSocketConnectCallback() {
        @Override
        public void onCompleted(Exception ex, WebSocket webSocket) {
            if (ex != null) {
                ex.printStackTrace();
                return;
            }
            webSocket.send("a string");
            webSocket.send(new byte[10]);
            webSocket.setStringCallback(new StringCallback() {
                public void onStringAvailable(String s) {
                    System.out.println("I got a string: " + s);
                }
            });
            webSocket.setDataCallback(new DataCallback() {
                public void onDataAvailable(ByteBufferList byteBufferList) {
                    System.out.println("I got some bytes!");
                    // note that this data has been read
                    byteBufferList.recycle();
                }
            });
        }
    }).get();
}catch(InterruptedException e){
//handle exception 
}catch(ExecutionException e){
//handle exception
}

if(websocket!=null && websocket.isOpen()){
//websocket is working fine 
}

你可以使用websocket.isClosed（）等其他語句;