Question

我正在尝试使用SocketIO从Android客户端连接Node.js，但我在Logcat中面临SocketTimeOutException。

mycode的：

MainActivity.java

package com.example.androidtestclient;

import io.socket.IOAcknowledge;
import io.socket.IOCallback;
import io.socket.SocketIO;
import io.socket.SocketIOException;

import java.net.MalformedURLException;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class MainActivity extends Activity {

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

try {
    SocketIO socket = new SocketIO("http://10.42.0.32:3000/");


    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();
}

} }

Node.js代码

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

app.listen(3000);

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

例外：

12-07 15:28:53.396: W/System.err(4141): io.socket.SocketIOException: Error while handshaking
12-07 15:28:53.396: W/System.err(4141):     at io.socket.IOConnection.handshake(IOConnection.java:322)
12-07 15:28:53.396: W/System.err(4141):     at io.socket.IOConnection.access$7(IOConnection.java:292)
12-07 15:28:53.396: W/System.err(4141):     at io.socket.IOConnection$ConnectThread.run(IOConnection.java:199)
12-07 15:28:53.396: W/System.err(4141): Caused by: java.net.SocketTimeoutException
12-07 15:28:53.396: W/System.err(4141):     at java.net.PlainSocketImpl.read(PlainSocketImpl.java:491)
12-07 15:28:53.396: W/System.err(4141):     at java.net.PlainSocketImpl.access$000(PlainSocketImpl.java:46)
12-07 15:28:53.396: W/System.err(4141):     at java.net.PlainSocketImpl$PlainSocketInputStream.read(PlainSocketImpl.java:240)
12-07 15:28:53.396: W/System.err(4141):     at java.io.InputStream.read(InputStream.java:163)
12-07 15:28:53.396: W/System.err(4141):     at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:142)
12-07 15:28:53.396: W/System.err(4141):     at java.io.BufferedInputStream.read(BufferedInputStream.java:227)
12-07 15:28:53.396: W/System.err(4141):     at libcore.io.Streams.readAsciiLine(Streams.java:201)
12-07 15:28:53.396: W/System.err(4141):     at libcore.net.http.HttpEngine.readResponseHeaders(HttpEngine.java:547)
12-07 15:28:53.396: W/System.err(4141):     at libcore.net.http.HttpEngine.readResponse(HttpEngine.java:787)
12-07 15:28:53.396: W/System.err(4141):     at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:274)
12-07 15:28:53.396: W/System.err(4141):     at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
12-07 15:28:53.396: W/System.err(4141):     at io.socket.IOConnection.handshake(IOConnection.java:313)
12-07 15:28:53.396: W/System.err(4141):     ... 2 more

在浏览器中，我可以连接localhost：3000，但在Android Client中面临问题。我还在应用程序中提供了系统IP地址。

请给我一些解决方案，请告诉我。

Answer 1

问题是您的客户端不支持socket.io v1.0.x并且您在服务器端使用socket.io v1.0。您应该降级服务器上的socket.io版本或更改您的库并使用另一个支持v1的库如果您使用的是android studio，可以使用this，但如果您使用的是eclipse，我不知道任何支持socket.io v1的库

如何使用SocketIO将Android客户端与Node.js服务器连接？

1 个答案: