1. AndroidAsyn

GitHub地址：https://github.com/koush/AndroidAsync

使用：

Gradle:

dependencies { compile 'com.koushikdutta.async:androidasync:2.+' }

使用方式：

AsyncHttpClient.getDefaultInstance().websocket(
            "ws://192.168.250.38:8181",// webSocket地址
            "8181",// 端口
            new AsyncHttpClient.WebSocketConnectCallback() {
                @Override
                public void onCompleted(Exception ex, WebSocket webSocket) {
                    if (ex != null) {
                        ex.printStackTrace();
                        return;
                    }
                    webSocket.send("a string");// 发送消息的方法
                    webSocket.send(new byte[10]);
                    webSocket.setStringCallback(new WebSocket.StringCallback() {
                        public void onStringAvailable(String s) {
                            Log.i(TAG, "onStringAvailable: " + s);
                        }
                    });
                    webSocket.setDataCallback(new DataCallback() {
                        public void onDataAvailable(DataEmitter emitter, ByteBufferList byteBufferList) {
                            System.out.println("I got some bytes!");
                            // note that this data has been read
                            byteBufferList.recycle();
                        }
                    });
                }
            });

2.autobahn

官网：http://autobahn.ws/android/，下到jar包放项目里面就好了

使用：

 private WebSocketConnection mConnect = new WebSocketConnection();
    String url = "ws://192.168.250.38:8181/";
    public void init() {
        try {
            mConnect.connect(url, new WebSocketHandler() {
                @Override
                public void onOpen() {
                    Log.i(TAG, "onOpen: ");
                }
                @Override
                public void onTextMessage(String payload) {
                    Log.i(TAG, "onTextMessage: "+payload);
                }
                @Override
                public void onClose(int code, String reason) {
                    Log.i(TAG, "onClose: " + code + "|" + reason);
                }
            });
        } catch (WebSocketException e) {
            e.printStackTrace();
        }
    }

3.java-webSocket

GitHub地址：https://github.com/TooTallNate/Java-WebSocket

使用：

  private String address = "ws://192.168.250.38:8181/";
    private URI uri;
    private static final String TAG = "JavaWebSocket";

    public void initSockect() {
        try {
            uri = new URI(address);
        } catch (URISyntaxException e) {
            e.printStackTrace();
        }
        if (null == mWebSocketClient) {
            mWebSocketClient = new WebSocketClient(uri) {
                @Override
                public void onOpen(ServerHandshake serverHandshake) {
                    Log.i(TAG, "onOpen: ");
                }
                @Override
                public void onMessage(String s) {
                    Log.i(TAG, "onMessage: " + s);
                }
                @Override
                public void onClose(int i, String s, boolean b) {
                    Log.i(TAG, "onClose: ");
                }
                @Override
                public void onError(Exception e) {
                    Log.i(TAG, "onError: ");
                }
            };
            mWebSocketClient.connect();
        }
    }

4.Netty

官网：http://netty.io/

参考

知乎WebSocket原理：https://www.zhihu.com/question/20215561

阮一峰WebSocket教程：http://www.ruanyifeng.com/blog/2017/05/websocket.html

Java-WebSocket：https://github.com/TooTallNate/Java-WebSocket

AndroidAsync：https://github.com/koush/AndroidAsync