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
1 2 3 4 5 6 7 | <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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | 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 } } } |
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