Question

我第一次尝试将我的Android应用程序连接到节点js服务器（在本地系统上），但它没有连接。我在过去的15天里尝试过这个但是没有取得丰硕的成果。这是我的代码，请查看并向我提供解决方案。

这是连接服务器的主要活动代码

public class MainActivity extends Activity {

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

    try {
        SocketIO socket = new SocketIO("My_System_IP:3000/");
        socket.connect(new IOCallback() {
            @Override
            public void onMessage(JSONObject json, IOAcknowledge ack) {
                try {
                    System.out.println("Server said:" + json.toString(2));
                    // display("Connectet  and " + json.toString(2));
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onMessage(String data, IOAcknowledge ack) {
                System.out.println("Server said: " + data);
                // display("Connectet  and " + data);
            }

            @Override
            public void onError(SocketIOException socketIOException) {
                System.out.println("an Error occured");
                Log.d("error", "an error occured");
                // display("not Connectet == error occured ");
                socketIOException.printStackTrace();
            }

            @Override
            public void onDisconnect() {
                System.out.println("Connection terminated.");
                Log.e("disconnect", "Connection terminated");
                // display("disConnectet ");
            }

            @Override
            public void onConnect() {
                System.out.println("Connection established");
                Log.v("connect", "Connection established");
                // display("Connectet  and done");
            }

            @Override
            public void on(String event, IOAcknowledge ack, Object... args) {
                System.out
                        .println("Server triggered event '" + event + "'");
                Log.v("ON", "Server triggered event '" + event + "'");
                // display("Connectet  and " + event);
            }
        });

        // This line is cached until the connection is establisched.
        socket.send("Hello Server!");
    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}
}

这是IOcallback类代码

  public interface IOCallback {

/**
 * On disconnect. Called when the socket disconnects and there are no further attempts to reconnect
 */
void onDisconnect();

/**
 * On connect. Called when the socket becomes ready so it is now able to receive data
 */
void onConnect();

/**
 * On message. Called when the server sends String data.
 *
 * @param data the data.
 * @param ack an {@link IOAcknowledge} instance, may be <code>null</code> if there's none
 */
void onMessage(String data, IOAcknowledge ack);

/**
 * On message. Called when the server sends JSON data.
 *
 * @param json JSON object sent by server.
 * @param ack an {@link IOAcknowledge} instance, may be <code>null</code> if there's none
 */
void onMessage(JSONObject json, IOAcknowledge ack);

/**
 * On [Event]. Called when server emits an event.
 *
 * @param event Name of the event
 * @param ack an {@link IOAcknowledge} instance, may be <code>null</code> if there's none
 * @param args Arguments of the event
 */
void on(String event, IOAcknowledge ack, Object... args);

/**
 * On error. Called when socket is in an undefined state. No reconnect attempts will be made.
 *
 * @param socketIOException the last exception describing the error
 */
void onError(SocketIOException socketIOException);
 }

此代码的其他代码取自github上提供的this源代码。

请帮我解决这个问题，当我运行这段代码时会给出一个错误 “发生错误” 我在错误here

上附加了快照

服务器端nodejs代码是

var http = require('http');
 io      = require('socket.io');
 var app = http.createServer();
 app.listen(3000);

 console.log('Server running at http://127.0.0.1:3000/');

 // Socket.IO server
  var io = io.listen(app)
  , nicknames = {};

  io.sockets.on('connection', function (socket) {
  socket.on('user message', function (msg) {
  socket.broadcast.emit('user message', {user: socket.nickname, message: msg.message});
  });

  socket.on('nickname', function (nick, fn) {
  nickname = nick.nickname;
  if (nicknames[nickname]) {
   fn(true);
  } else {
   fn(false);
  nicknames[nickname] = socket.nickname = nickname;
  socket.broadcast.emit('announcement', {user: nickname, action: 'connected'});
  io.sockets.emit('nicknames', nicknames);
 }
 });

 socket.on('disconnect', function () {
  if (!socket.nickname) return;

delete nicknames[socket.nickname];
socket.broadcast.emit('announcement', {user: socket.nickname, action: 'disconected'});
socket.broadcast.emit('nicknames', nicknames);
 });
});

提前致谢

将android应用程序连接到节点js服务器

0 个答案: