Android应用程序使用Socket.io连接到Node.js服务器
我无法将Android应用程序连接到socket.io聊天服务器。我使用的是Gotox创建的socket.io-java-client,可以在这里找到: 服务器通过端口7000在本地运行。我使用的是android模拟器,所以我使用10.0.2.2:7000访问服务器 任何帮助都将不胜感激,我在SSL方面没有太多经验。如果我找到一个有效的解决方案,我也会发布它 Node.js服务器Android应用程序使用Socket.io连接到Node.js服务器,android,node.js,sockets,ssl,socket.io,Android,Node.js,Sockets,Ssl,Socket.io,我无法将Android应用程序连接到socket.io聊天服务器。我使用的是Gotox创建的socket.io-java-client,可以在这里找到: 服务器通过端口7000在本地运行。我使用的是android模拟器,所以我使用10.0.2.2:7000访问服务器 任何帮助都将不胜感激,我在SSL方面没有太多经验。如果我找到一个有效的解决方案,我也会发布它 Node.js服务器 var express = require('express'); var app = express(); var
var express = require('express');
var app = express();
var server = require('http').createServer(app).listen(7000);
var io = require('socket.io').listen(server);
io.sockets.on('connection', function(client){
client.on('message', function(err, msg){
client.broadcast.emit('message', msg);
});
});
package.json
{
"name": "simplechat",
"version": "0.0.1",
"main": "app.js",
"dependencies": {
"express" : "~4.0.0",
"socket.io" : "~0.9.13"
}
}
Android:SendMessageActivity
public class SendMessageActivity extends Activity {
private static final String SERVER_ADDRESS = "https://10.0.2.2:7000";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send_message);
System.out.println("Sever: " + SERVER_ADDRESS);
try {
SocketIO socket = new SocketIO(new URL(SERVER_ADDRESS), new IOCallback() {
@Override
public void onDisconnect() {
System.out.println("disconnected");
}
@Override
public void onConnect() {
System.out.println("connected");
}
@Override
public void onMessage(String s, IOAcknowledge ioAcknowledge) {
}
@Override
public void onMessage(JSONObject jsonObject, IOAcknowledge ioAcknowledge) {
}
@Override
public void on(String event, IOAcknowledge ioAcknowledge, Object... objects) {
}
@Override
public void onError(SocketIOException e) {
e.printStackTrace();
}
});
} catch (MalformedURLException ex) {
ex.printStackTrace();
}
}
Android权限
<uses-permission
android:name="android.permission.INTERNET">
</uses-permission>
正如我所听说的,您的模拟器网络与您的PC不同。因此,如果您可以通过更改,请在与PC连接到同一网络的实际手机上尝试此操作
你可能无法从你的模拟器上ping 10.0.2.2,或者从你的电脑到模拟器上ping 10.0.2.2。我实际上解决了这个问题。我使用了我电脑的本地IP,应用程序能够从模拟器连接到聊天服务器。我不知道为什么会这样,但它可能会在将来帮助某些人:) 更新:
public class SocketSingleton {
private static SocketSingleton instance;
private static final String SERVER_ADDRESS = "http://1.2.3.4:1234";
private SocketIO socket;
private Context context;
public static SocketSingleton get(Context context){
if(instance == null){
instance = getSync(context);
}
instance.context = context;
return instance;
}
public static synchronized SocketSingleton getSync(Context context){
if (instance == null) {
instance = new SocketSingleton(context);
}
return instance;
}
public SocketIO getSocket(){
return this.socket;
}
private SocketSingleton(Context context){
this.context = context;
this.socket = getChatServerSocket();
this.friends = new ArrayList<Friend>();
}
private SocketIO getChatServerSocket(){
try {
SocketIO socket = new SocketIO(new URL(SERVER_ADDRESS), new IOCallback() {
@Override
public void onDisconnect() {
System.out.println("disconnected");
}
@Override
public void onConnect() {
System.out.println("connected");
}
@Override
public void on(String event, IOAcknowledge ioAcknowledge, Object... objects) {
if (event.equals("chatMessage")) {
JSONObject json = (JSONObject) objects[0];
ChatMessage chatMessage = new ChatMessage(json);
Intent intent = new Intent();
intent.setAction("newChatMessage");
intent.putExtra("chatMessage", chatMessage);
context.sendBroadcast(intent);
}
}
@Override
public void onError(SocketIOException e) {
e.printStackTrace();
}
});
return socket;
} catch (MalformedURLException ex) {
ex.printStackTrace();
}
return null;
}
}
public class ChatActivity extends Activity {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
IntentFilter newChatMessageFilter = new IntentFilter("newChatMessage");
this.registerReceiver(new MessageReceiver(), newChatMessageFilter);
...
public class MessageReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent){
final ChatMessage chatMessage =(ChatMessage) intent.getExtras().get("chatMessage");
runOnUiThread(new Runnable() {
@Override
public void run() {
mAdapter.add(chatMessage);
mAdapter.notifyDataSetChanged();
}
});
}
}
}
var express = require('express');
var app = express();
var server = require('http').createServer(app).listen(1234);
var io = require('socket.io').listen(server);
io.sockets.on('connection', function(client){
console.log("client connected: " + client.id);
client.on("sendTo", function(chatMessage){
console.log("Message From: " + chatMessage.fromName);
console.log("Message To: " + chatMessage.toName);
io.sockets.socket(chatMessage.toClientID).emit("chatMessage", {"fromName" : chatMessage.fromName,
"toName" : chatMessage.toName,
"toClientID" : chatMessage.toClientID,
"msg" : chatMessage.msg});
});
});
这就是我最终构建项目的方式。我创建了一个singleton类来处理Android端的套接字连接(您也可以将其作为一项服务)。当接收到消息时,singleton类向应用程序的其余部分广播一个意图。然后,广播接收器在相关活动中接收到意图
Android端(单例):
public class SocketSingleton {
private static SocketSingleton instance;
private static final String SERVER_ADDRESS = "http://1.2.3.4:1234";
private SocketIO socket;
private Context context;
public static SocketSingleton get(Context context){
if(instance == null){
instance = getSync(context);
}
instance.context = context;
return instance;
}
public static synchronized SocketSingleton getSync(Context context){
if (instance == null) {
instance = new SocketSingleton(context);
}
return instance;
}
public SocketIO getSocket(){
return this.socket;
}
private SocketSingleton(Context context){
this.context = context;
this.socket = getChatServerSocket();
this.friends = new ArrayList<Friend>();
}
private SocketIO getChatServerSocket(){
try {
SocketIO socket = new SocketIO(new URL(SERVER_ADDRESS), new IOCallback() {
@Override
public void onDisconnect() {
System.out.println("disconnected");
}
@Override
public void onConnect() {
System.out.println("connected");
}
@Override
public void on(String event, IOAcknowledge ioAcknowledge, Object... objects) {
if (event.equals("chatMessage")) {
JSONObject json = (JSONObject) objects[0];
ChatMessage chatMessage = new ChatMessage(json);
Intent intent = new Intent();
intent.setAction("newChatMessage");
intent.putExtra("chatMessage", chatMessage);
context.sendBroadcast(intent);
}
}
@Override
public void onError(SocketIOException e) {
e.printStackTrace();
}
});
return socket;
} catch (MalformedURLException ex) {
ex.printStackTrace();
}
return null;
}
}
public class ChatActivity extends Activity {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
IntentFilter newChatMessageFilter = new IntentFilter("newChatMessage");
this.registerReceiver(new MessageReceiver(), newChatMessageFilter);
...
public class MessageReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent){
final ChatMessage chatMessage =(ChatMessage) intent.getExtras().get("chatMessage");
runOnUiThread(new Runnable() {
@Override
public void run() {
mAdapter.add(chatMessage);
mAdapter.notifyDataSetChanged();
}
});
}
}
}
var express = require('express');
var app = express();
var server = require('http').createServer(app).listen(1234);
var io = require('socket.io').listen(server);
io.sockets.on('connection', function(client){
console.log("client connected: " + client.id);
client.on("sendTo", function(chatMessage){
console.log("Message From: " + chatMessage.fromName);
console.log("Message To: " + chatMessage.toName);
io.sockets.socket(chatMessage.toClientID).emit("chatMessage", {"fromName" : chatMessage.fromName,
"toName" : chatMessage.toName,
"toClientID" : chatMessage.toClientID,
"msg" : chatMessage.msg});
});
});
服务器端:
public class SocketSingleton {
private static SocketSingleton instance;
private static final String SERVER_ADDRESS = "http://1.2.3.4:1234";
private SocketIO socket;
private Context context;
public static SocketSingleton get(Context context){
if(instance == null){
instance = getSync(context);
}
instance.context = context;
return instance;
}
public static synchronized SocketSingleton getSync(Context context){
if (instance == null) {
instance = new SocketSingleton(context);
}
return instance;
}
public SocketIO getSocket(){
return this.socket;
}
private SocketSingleton(Context context){
this.context = context;
this.socket = getChatServerSocket();
this.friends = new ArrayList<Friend>();
}
private SocketIO getChatServerSocket(){
try {
SocketIO socket = new SocketIO(new URL(SERVER_ADDRESS), new IOCallback() {
@Override
public void onDisconnect() {
System.out.println("disconnected");
}
@Override
public void onConnect() {
System.out.println("connected");
}
@Override
public void on(String event, IOAcknowledge ioAcknowledge, Object... objects) {
if (event.equals("chatMessage")) {
JSONObject json = (JSONObject) objects[0];
ChatMessage chatMessage = new ChatMessage(json);
Intent intent = new Intent();
intent.setAction("newChatMessage");
intent.putExtra("chatMessage", chatMessage);
context.sendBroadcast(intent);
}
}
@Override
public void onError(SocketIOException e) {
e.printStackTrace();
}
});
return socket;
} catch (MalformedURLException ex) {
ex.printStackTrace();
}
return null;
}
}
public class ChatActivity extends Activity {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
IntentFilter newChatMessageFilter = new IntentFilter("newChatMessage");
this.registerReceiver(new MessageReceiver(), newChatMessageFilter);
...
public class MessageReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent){
final ChatMessage chatMessage =(ChatMessage) intent.getExtras().get("chatMessage");
runOnUiThread(new Runnable() {
@Override
public void run() {
mAdapter.add(chatMessage);
mAdapter.notifyDataSetChanged();
}
});
}
}
}
var express = require('express');
var app = express();
var server = require('http').createServer(app).listen(1234);
var io = require('socket.io').listen(server);
io.sockets.on('connection', function(client){
console.log("client connected: " + client.id);
client.on("sendTo", function(chatMessage){
console.log("Message From: " + chatMessage.fromName);
console.log("Message To: " + chatMessage.toName);
io.sockets.socket(chatMessage.toClientID).emit("chatMessage", {"fromName" : chatMessage.fromName,
"toName" : chatMessage.toName,
"toClientID" : chatMessage.toClientID,
"msg" : chatMessage.msg});
});
});
我知道这并不是对OP文章的真正回答,但对于那些可能感兴趣的人来说,这是我制作的一个教程,让你的Android与Node.js服务器通信-,而不需要任何额外的库 这是对它在最后的样子的预感:
Client socket = new Client("192.168.0.8", 1234);
socket.setOnEventOccurred(new Client.OnEventOccurred() {
@Override
public void onMessage(String message) {
}
@Override
public void onConnected(Socket socket) {
socket.send("Hello World!");
socket.disconnect();
}
@Override
public void onDisconnected(Socket socket, String message) {
}
});
socket.connect();
Puma已经回答了如何使用SocketIO实现套接字连接的问题。这没有什么新的贡献。然而,这是一种帮助新手的尝试,同时也介绍了Socket.io的java库的实现 IO有自己的java实现,您可以按照它为Android/java创建套接字应用程序 安卓端: 将其包含在您的构建中gradle
08-09 16:07:28.224 8411-8441/com.example.puma.chatexample W/System.err﹕ io.socket.SocketIOException: Error while handshaking
08-09 16:07:28.225 8411-8441/com.example.puma.chatexample W/System.err﹕ at io.socket.IOConnection.handshake(IOConnection.java:322)
08-09 16:07:28.225 8411-8441/com.example.puma.chatexample W/System.err﹕ at io.socket.IOConnection.access$600(IOConnection.java:39)
08-09 16:07:28.225 8411-8441/com.example.puma.chatexample W/System.err﹕ at io.socket.IOConnection$ConnectThread.run(IOConnection.java:199)
08-09 16:07:28.226 8411-8441/com.example.puma.chatexample W/System.err﹕ Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'javax.net.ssl.SSLSocketFactory javax.net.ssl.SSLContext.getSocketFactory()' on a null object reference
08-09 16:07:28.226 8411-8441/com.example.puma.chatexample W/System.err﹕ at io.socket.IOConnection.handshake(IOConnection.java:302)
08-09 16:07:28.227 8411-8441/com.example.puma.chatexample W/System.err﹕ ... 2 more
compile ('io.socket:socket.io-client:0.8.3') {
// excluding org.json which is provided by Android
exclude group: 'org.json', module: 'json'
}
在应用程序中提供权限:
Node.js端
使用socket.io创建普通套接字不幸的是,我没有开发手机,所以我不得不等待并询问朋友。我会尽快公布结果。基于此文档(Emulator Networking部分),我选择了10.0.2.2:10.0.2.2是您电脑的IP地址吗?也许可以根据文档检查一下,10.0.2.2是主机环回接口的特殊别名(即开发机器上的127.0.0.1)。它应该允许仿真器访问在您的PC上本地运行的服务器。没问题。我添加了一个基本的例子来说明我最终是如何构建我的应用程序的。非常感谢。对于node.js聊天,我们还必须添加任何库?chillinpuma:你能提供一个示例吗?只是socket.io和expressI正在尝试做完全相同的事情(在我的例子中也是如此),但我在活动生命周期方面有问题。你是怎么做到的?例如,当有人最小化应用程序或关闭应用程序时?或者在上面打开另一个应用程序?你是如何托管Node.js服务器的?我正在Azure上托管它。作为一个完整的例子