我正在尝试使用socket.io开发一个应用程序.有2个设备,当有人触摸到设备1的屏幕时,我需要在设备2上看到一条消息.
这是nodeJS服务器代码(我使用的是SocketIO v0.9.*,因为socket.io-java-client不支持版本> 1.0.0)
var app = require('http').createServer()
var io = require('socket.io').listen(1337);
io.on('connection',function (socket) {
socket.on('tiklama',function (data) {
console.log(data);
io.emit('tiklama',data);
});
});
和我的Java代码(整个代码为click here):
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final RelativeLayout anapanel = (RelativeLayout) findViewById(R.id.anapanel);
final TextView tw = (TextView) findViewById(R.id.textView1);
final TextView tw2 = (TextView) findViewById(R.id.textView2);
final TextView tw4 = (TextView) findViewById(R.id.textView4);
try {
socket = new SocketIO("http://SERVERIPADDRESS:1337");
socket.connect(new IOCallback() {
@Override
public void onMessage(JSONObject json,IOAcknowledge ack) {
try {
Log.d("x","Server said:" + json.toString(2));
} catch (JSONException e) {
e.printStackTrace();
}
}
@Override
public void onMessage(String data,IOAcknowledge ack) {
Log.d("x","Server said: " + data);
}
@Override
public void onError(SocketIOException socketIOException) {
Log.d("x","an Error occured");
socketIOException.printStackTrace();
}
@Override
public void onDisconnect() {
Log.d("x","Connection terminated.");
}
@Override
public void onConnect() {
Log.d("x","Connection established");
}
@Override
public void on(String event,IOAcknowledge ack,Object... args) {
Log.d("x","Server triggered event '" + event + "'");
if(event.contentEquals("tiklama")) {
tw4.setText("Someone touched to device 1");
}
}
});
// This line is cached until the connection is establisched.
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
anapanel.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v,MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == MotionEvent.ACTION_DOWN){
socket.emit("tiklama","someoneclicked");
}
return false;
}
});
}
所以这里我的问题是:两台设备都成功连接到NodeJS服务器,当我触摸设备上的屏幕时,我在服务器控制台上看到“有人点击”消息.但是第二个设备没有收到此消息,并且LogCat上没有任何反应.我怎样才能解决这个问题并用socket.io传达这两个设备?
最佳答案
由于您使用的是0.9.*版本的socket.io,要广播消息,您需要使用io.sockets.emit.快捷方式io.emit是在1.0版本中引入的.
原文链接:https://www.f2er.com/android/431150.html变化:
io.emit('tiklama',data);
至
io.sockets.emit('tiklama',data);
Migration from 0.9 doc说:
Shortcuts In general there are some new shortcuts for common things.
The old versions should still work,but shortcuts are nice.Broadcasting to all clients in default namespace
PrevIoUsly:
io.sockets.emit(‘eventname’,‘eventdata’);
Now:
io.emit(‘eventname’,‘eventdata’);
Neat. Note that in both cases,
these messages reach all clients connected to the default ‘/’
namespace,but not clients in other namespaces.