android利用WebSocket实现消息推送

1、webSocket服务端的配置与代码：

（1）、服务器端工程目录结构：

（2）、web.xml的配置

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<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）、服务端代码

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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;           /**          * 打开连接          */         @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);         }           /**          * 接收消息          */         @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客户端配置与代码

（1）、导入java-websocket-1.3.0.jar

（2）、客户端代码

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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();//此处如果用webSocketWorker.connect();会出错，需要多注意             } 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                       }               } }