SocketIO Android 未发出连接事件

Question

我正在使用 Android native socketio library 和 NodeJS。

    // on my Android activity
    private Socket mSocket;
    {
        try {
            mSocket = IO.socket("http://IP_OF_MY_SERVER");
        } catch (URISyntaxException e) {}
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mSocket.connect();
    }

.

// on my nodejs app
var restify = require('restify');
var server = restify.createServer({
  name: 'myapp',
  version: '1.0.0'
});
var io = require('socket.io')(server.server);

server.use(restify.acceptParser(server.acceptable));
server.use(restify.queryParser());
server.use(restify.bodyParser());

io.on('connection', function(socket){
  console.log('a user connected');
  socket.on('new-item', function(data) {
    console.log(data);
  });
});

我正在遵循官方指南，但仍然 mSocket.connect() 没有发出 connection 事件，并且当我启动 activity.[=23 时，我的控制台上没有 a user connected =]

你能告诉我我遗漏了什么吗？我该如何调试它？

编辑

我的 Ubuntu 服务器上的 NodeJS 应用程序：http://paste.ubuntu.com/14233470/

Android activity : http://paste.ubuntu.com/14233482/

编辑 2

我已经按照建议更改了代码 here:

var io = require('socket.io').listen(server);

这次我在启动 activity

时遇到了这个错误

myapp 在 http://104.131.99.145:3000

监听

http.js:691
    throw new Error('Can\'t set headers after they are sent.');
          ^
Error: Can't set headers after they are sent.
    at ServerResponse.OutgoingMessage.setHeader (http.js:691:11)
    at ServerResponse.format (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/response.js:145:10)
    at ServerResponse.send (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/response.js:338:14)
    at emitRouteError (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/server.js:201:13)
    at onRoute (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/server.js:754:21)
    at Router.find (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/router.js:608:5)
    at Server._route (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/server.js:747:21)
    at routeAndRun (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/server.js:705:14)
    at Server._handle (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/server.js:725:9)
    at Server.onRequest (/var/www/biditapi.erayalakese.com/node_modules/restify/lib/server.js:326:14)
    at Server.EventEmitter.emit (events.js:98:17)
    at HTTPParser.parser.onIncoming (http.js:2108:12)
    at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:121:23)
    at Socket.socket.ondata (http.js:1966:22)
    at TCP.onread (net.js:525:27)

Answer 1

几个要点：

创建一个Socket对象：

private Socket mSocket;
{
    try {
        mSocket = IO.socket(CHAT_SERVER_URL); // Your server's URL
    }
    catch (URISyntaxException e) {
        throw new RuntimeException(e);
    }
}

onCreate(): connect & set the socket error listener

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

    mSocket.on(Socket.EVENT_CONNECT_ERROR, onConnectError);
    mSocket.on(Socket.EVENT_CONNECT_TIMEOUT, onConnectError);
    mSocket.connect();
}


private Emitter.Listener onConnectError = new Emitter.Listener() {
    @Override
    public void call(Object... args) {
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Toast.makeText(getApplicationContext(), "Unable to connect to NodeJS server", Toast.LENGTH_LONG).show();
            }
        });
    }
};

断开onDestroy()方法中的Socket

@Override
protected void onDestroy() {
    super.onDestroy();

    mSocket.disconnect();
    mSocket.off(Socket.EVENT_CONNECT_ERROR, onConnectError);
    mSocket.off(Socket.EVENT_CONNECT_TIMEOUT, onConnectError);
}

没有收到错误信息是正确设置的第一个里程碑。

创建一个WLAN:

(Open the command line with admin privileges, run these commands:)

netsh wlan set hostednetwork mode=allow ssid=NodeSocket key=1234okok

netsh wlan start hostednetwork

确保您的 Android 设备已连接到此网络，并且您的 Node.js 服务器已启动且运行。

SocketIO Android 未发出连接事件

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