Question

我正在使用原生Android应用，我必须将我的应用程序连接到Sockjs服务器。我试图连接Socket.IO，Autobahn，WebSockets，但它没有连接。 android有什么sockjs客户端吗？请帮忙，谢谢。

Socket.IO：

private void connectToSocket(String serverUrl, String accessKey) {
    IO.Options opts = new IO.Options();
    opts.forceNew = true;
    opts.reconnection = true;
    //opts.query = "accessKey="+accessKey;
    String host = serverUrl;

    try {
        mSocket = IO.socket(host, opts);
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }

    mSocket.on(Socket.EVENT_CONNECT_ERROR, onConnectError);
    mSocket.on(Socket.EVENT_CONNECT_TIMEOUT, onConnectError);
    mSocket.on(Socket.EVENT_CONNECT, onConnect);
    mSocket.on("new message", onNewMessage);
    mSocket.connect().emit("accessKey", accessKey);
    if (mSocket.connected()) {
        Log.d("SocketMsg: ", "Connected");
    }

}

private Emitter.Listener onConnect = new Emitter.Listener() {

    @Override
    public void call(final Object... args) {
        MainActivity.this.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Log.d("SocketMsg: ", args[0].toString());
                //mSocket.emit("accessKey", accessKey);
                Toast.makeText(MainActivity.this.getApplicationContext(),
                        "Connect", Toast.LENGTH_LONG).show();
                for (Object o : args) {
                    Log.i("IO " + Socket.EVENT_CONNECT_ERROR, o.toString());
                }
            }
        });
    }
};
private Emitter.Listener onConnectError = new Emitter.Listener() {
    @Override
    public void call(final Object... args) {
        MainActivity.this.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                Log.d("SocketMsg: ", args[0].toString());
                Toast.makeText(MainActivity.this.getApplicationContext(),
                        "Error", Toast.LENGTH_LONG).show();
                for (Object o : args) {
                    Log.i("IO " + Socket.EVENT_CONNECT_ERROR, o.toString());
                }
            }
        });
    }
};

它给出了＆＃x;民意调查错误＆＃39;

Answer 1

现在使用以下技巧成功连接到SockJS：。

1. Place a web view and set its visibility to gone.
2. Use SockJS client in webview.
3. Create a javascript Interface that send data back to native code when get data from socket.
4. We have to call the function only once from native code.

JavaScript Interace：

public class WebAppInterface {
    Context mContext;

    /**
     * Instantiate the interface and set the context
     */
    WebAppInterface(Context c) {
        mContext = c;
    }

    /**
     * Show a toast from the web page
     */
    @JavascriptInterface
    public void msg(final String toast) {
        Log.d("msg: ", toast);
        if (toast.contains("{"))
            createMarkerList(toast);
    }
}

Webview上的SockJS客户端：

<script type="text/javascript">
    function connectToSocket(url, accessKey){
        Android.msg(String("called"));
        var sock = new SockJS("http://api.example.in:8182/realtime");
        sock.onopen = function() {
            Android.msg("open");
            sock.send(JSON.stringify({
              key: accessKey
            }));
        };

        sock.onclose = function() {
            Android.msg("close");
        };

        sock.onmessage = function(e) {
            result = e.data.replace(/,\s*$/, '');
            Android.msg(String(result));
        };

        sock.onerror = function(e) {
            Android.msg("error");
        };
    }
</script>

调用js函数：

webView.loadUrl(javascript:connectToSocket(url, accessKey));

Answer 2

我建议您使用socket.io。

Socket.io Blog

为客户端和服务器提供了一个很好的示例

将Android应用程序连接到sockjs服务器

2 个答案: