Android uses WebSocket to Implement Message push and androidwebsocket

Android uses WebSocket to Implement Message push and androidwebsocket

1. Configuration and code of the webSocket Server:

(1) directory structure of the server project:

(2) web. xml configuration

<Servlet-name> webSocketServlet </servlet-name>
<Servlet-class> com.cn. controller. WebSocketServletService </servlet-class>
</Servlet>
<Servlet-mapping>
<Servlet-name> webSocketServlet </servlet-name>
<Url-pattern>/webSocketServlet </url-pattern>
</Servlet-mapping>

(3) server code

Public class WebSocketServletService extends WebSocketServlet {

Private static final long serialVersionUID = 1L;
Private static List <MyMessageInbound> myMessageInbounds = new ArrayList <WebSocketServletService. MyMessageInbound> ();
@ SuppressWarnings ("deprecation ")
@ Override
Protected StreamInbound createWebSocketInbound (String arg0,
HttpServletRequest arg1 ){
// TODO Auto-generated method stub
Return new MyMessageInbound ();
}
Private class MyMessageInbound extends MessageInbound {
WsOutbound myoutbound;

/**
* Open the connection.
*/
@ Override
Public void onOpen (WsOutbound outbound ){
Try {
System. out. println ("Open Client .");
This. myoutbound = outbound;
MyMessageInbounds. add (this );
Outbound. writeTextMessage (CharBuffer. wrap ("Hello! "));
} Catch (IOException e ){
E. printStackTrace ();
}
}

@ Override
Public void onClose (int status ){
System. out. println ("Close Clients .");
MyMessageInbounds. remove (this );
}

/**
* Receive messages
*/
@ Override
Public void onTextMessage (CharBuffer cb) throws IOException {
System. out. println ("Accept Message:" + cb );
For (MyMessageInbound myMessageInbound: myMessageInbounds ){
CharBuffer buffer = CharBuffer. wrap (cb );
MyMessageInbound. myoutbound. writeTextMessage (buffer );
MyMessageInbound. myoutbound. flush ();
}
}
@ Override
Public void onBinaryMessage (ByteBuffer bb) throws IOException {
}
}
}
2. android client configuration and code

(1), import java-websocket-1.3.0.jar

(2) client code

Public class MainActivity extends Activity {
@ Override
Protected void onCreate (Bundle savedInstanceState ){
Super. onCreate (savedInstanceState );
SetContentView (R. layout. activity_main );
}
Handler handler = new Handler ()
{

@ Override
Public void handleMessage (Message msg ){
// TODO Auto-generated method stub
Toast. makeText (MainActivity. this, msg. getData (). getString ("info"), Toast. LENGTH_SHORT). show ();
}

};
@ Override
Public boolean onCreateOptionsMenu (Menu menu ){
// Inflate the menu; this adds items to the action bar if it is present.
GetMenuInflater (). inflate (R. menu. main, menu );
Return true;
}

@ Override
Public boolean onOptionsItemSelected (MenuItem item ){
// Handle action bar item clicks here. The action bar will
// Automatically handle clicks on the Home/Up button, so long
// As you specify a parent activity in AndroidManifest. xml.
Int id = item. getItemId ();
If (id = R. id. action_settings ){
URI uri = null;
Try {
Uri = new URI ("ws: // localhost/Breed/webSocketServlet ");
} Catch (URISyntaxException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}
WebSocketWorker webSocketWorker = new WebSocketWorker (uri, new Draft_17 ());
Try {
WebSocketWorker. connectBlocking (); // If webSocketWorker. connect () is used here, an error occurs. Pay attention to this.
} Catch (InterruptedException e ){
// TODO Auto-generated catch block
E. printStackTrace ();
}
WebSocketWorker. send ("text ");
Return true;
}
Return super. onOptionsItemSelected (item );
}

Private class WebSocketWorker extends WebSocketClient {

Public WebSocketWorker (URI serverUri, Draft draft ){
Super (serverUri, draft );
}

@ Override
Public void onClose (int arg0, String arg1, boolean arg2 ){
// TODO Auto-generated method stub

}
@ Override
Public void onError (Exception arg0 ){
// TODO Auto-generated method stub

}

@ Override
Public void onMessage (String arg0 ){
// TODO Auto-generated method stub
Bundle bundle = new Bundle ();
Bundle. putString ("info", arg0 );
Message message = new Message ();
Message. setData (bundle );
Handler. sendMessage (message );
}

@ Override
Public void onOpen (ServerHandshake arg0 ){
// TODO Auto-generated method stub

}

}
}