android利用websocket協議與伺服器通訊

最近做一個項目，需求中需要伺服器主動推送訊息到用戶端。這樣的話一般的http串連就不能使用了。博主問了個朋友，向我推薦websocket協議，特此測試了一下，發現效果很好。

android本身沒有websocket的庫，需要自己下載 http://autobahn.ws/android/downloads

用戶端代碼。。。。

介面布局自己寫，很簡單的兩個button

package com.example.test;import com.example.test.R;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;import de.tavendo.autobahn.WebSocketConnection;import de.tavendo.autobahn.WebSocketConnectionHandler;import de.tavendo.autobahn.WebSocketException;public class MainActivity extends Activity implements OnClickListener {private Button bt;private EditText ed_name;private EditText ed_text;private Button bt1;WebSocketConnection wsc;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);bt = (Button) findViewById(R.id.bt);ed_name = (EditText) findViewById(R.id.ed_name);ed_text = (EditText) findViewById(R.id.ed_text);bt1 = (Button) findViewById(R.id.bt1);bt.setOnClickListener(this);bt1.setOnClickListener(this);wsc = new WebSocketConnection();}private void connect() {System.out.println("開始串連websocket///");try {wsc.connect("ws://192.168.1.245:8080/DriveServer/mainservlet",new WebSocketConnectionHandler() {@Overridepublic void onBinaryMessage(byte[] payload) {System.out.println("onBinaryMessage size="+ payload.length);}@Overridepublic void onClose(int code, String reason) {System.out.println("onClose reason=" + reason);}@Overridepublic void onOpen() {System.out.println("onOpen");showtext("串連成功");// wsc.sendTextMessage("Hello!");// wsc.disconnect();}@Overridepublic void onRawTextMessage(byte[] payload) {System.out.println("onRawTextMessage size="+ payload.length);}@Overridepublic void onTextMessage(String payload) {System.out.println("onTextMessage" + payload);showtext(payload);}});} catch (WebSocketException e) {// TODO Auto-generated catch blocke.printStackTrace();}}@Overridepublic void onClick(View v) {// TODO Auto-generated method stubint id = v.getId();switch (id) {case R.id.bt :wsc.sendTextMessage("我是用戶端，我通過ws往伺服器發資料");break;case R.id.bt1 :connect();break;default :break;}}private void showtext(String msg) {Toast.makeText(this, msg, 0).show();}}

下面是伺服器代碼：

用的是jetty7內建的websocket庫

package com.websocket;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.nio.ByteBuffer;import java.nio.CharBuffer;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Set;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.eclipse.jetty.websocket.WebSocket;import org.eclipse.jetty.websocket.WebSocket.OnTextMessage;import org.eclipse.jetty.websocket.WebSocketServlet;public class ChatWebSocketServlet extends WebSocketServlet {private static final long serialVersionUID = 911879078000755859L;private List<MyWebSocket> list = new ArrayList<MyWebSocket>();class MyWebSocket implements OnTextMessage {private String userName = "匿名使用者";public MyWebSocket(String userName) {if (userName != null && userName.length() > 0) {this.userName = userName;}}private Connection conn;public void onClose(int arg0, String arg1) {// TODO Auto-generated method stubSystem.out.println("onOpen 中斷連線了。。。。。。。。" + arg1 + "  " + arg0);list.remove(this);}public void onOpen(Connection arg0) {// TODO Auto-generated method stubSystem.out.println("onOpen 串連了。。。。。。。。。。。。" + arg0.getMaxIdleTime());this.conn = arg0;if (!list.contains(arg0)) {list.add(this);} else {System.out.println("這個使用者已經串連了");}System.out.println(".." + list.size());}public void onMessage(String arg0) {String toname = arg0.substring(0, 3);System.out.println("toname-->" + toname);try {list.get(0).getConn().sendMessage(arg0.substring(3));System.out.println("發送的資料" + arg0.substring(3));} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private Connection getConn() {return this.conn;}}public WebSocket doWebSocketConnect(HttpServletRequest arg0, String arg1) {// TODO Auto-generated method stubString name = "";name = arg0.getParameter("username");System.out.println(name + "is connected");return new MyWebSocket(name);}@Overrideprotected void service(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubsuper.service(request, response);}}

歡迎交流，轉載請註明出處。