Androidpn学习与使用6

看看TaskSubmitter这个类。

/** * Class for summiting a new runnable task. */public class TaskSubmitter {final NotificationService notificationService;public TaskSubmitter(NotificationService notificationService) {this.notificationService = notificationService;}@SuppressWarnings("unchecked")public Future submit(Runnable task) {Future result = null;if (!notificationService.getExecutorService().isTerminated()&& !notificationService.getExecutorService().isShutdown()&& task != null) {result = notificationService.getExecutorService().submit(task);}return result;}}

由代码可以看出，这个类由一个NotificationService来构成，并且只有一个submit方法，返回一个Future对象

http://blog.csdn.net/yangyan19870319/article/details/6093481这篇文章介绍Future,不错。

其实通俗的讲，TaskSubmitter的subit方法就是，在连接正常的情况下，在线程池中跑一个线程task.

我猜测这个task其实就是用来进行socket通信用的。。。

回到NotificationService里面的connet方法，

public void connect() {Log.d(LOGTAG, "connect()...");taskSubmitter.submit(new Runnable() {public void run() {NotificationService.this.getXmppManager().connect();}});}

应该是XmppManager起作用了，开始进行网络通信了。

在onCreate方法中，XmppManager进行了初始化。

.getXmppManager().connect();是重点，等下看，先看看NotificationService的onCreate方法：

public void onCreate() {Log.d(LOGTAG, "onCreate()...");telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);// wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);// connectivityManager = (ConnectivityManager)// getSystemService(Context.CONNECTIVITY_SERVICE);sharedPrefs = getSharedPreferences(Constants.SHARED_PREFERENCE_NAME,Context.MODE_PRIVATE);// Get deviceIddeviceId = telephonyManager.getDeviceId();// Log.d(LOGTAG, "deviceId=" + deviceId);Editor editor = sharedPrefs.edit();editor.putString(Constants.DEVICE_ID, deviceId);editor.commit();//以上得到一些手机信息// If running on an emulatorif (deviceId == null || deviceId.trim().length() == 0//模拟器|| deviceId.matches("0+")) {if (sharedPrefs.contains("EMULATOR_DEVICE_ID")) {deviceId = sharedPrefs.getString(Constants.EMULATOR_DEVICE_ID,"");} else {deviceId = (new StringBuilder("EMU")).append((new Random(System.currentTimeMillis())).nextLong()).toString();editor.putString(Constants.EMULATOR_DEVICE_ID, deviceId);editor.commit();}}Log.d(LOGTAG, "deviceId=" + deviceId);// 以上都是一些配置信息xmppManager = new XmppManager(this);//初始化XmppManagertaskSubmitter.submit(new Runnable() {public void run() {NotificationService.this.start();// 开启推送服务}});}

初始化XmppManager和开启推送服务是重点。

先看看XmppManager的初始化代码

public XmppManager(NotificationService notificationService) {context = notificationService;//服务名taskSubmitter = notificationService.getTaskSubmitter();//得到TaskSubmittertaskTracker = notificationService.getTaskTracker();//得到TaskTracker,这个跟踪器就是用来统计一种NotificationService的行为次数的，具体还没研究sharedPrefs = notificationService.getSharedPreferences();//xmppHost = sharedPrefs.getString(Constants.XMPP_HOST, "localhost");xmppPort = sharedPrefs.getInt(Constants.XMPP_PORT, 5222);username = sharedPrefs.getString(Constants.XMPP_USERNAME, "aaa");password = sharedPrefs.getString(Constants.XMPP_PASSWORD, "a ");// 拿到一些参数connectionListener = new PersistentConnectionListener(this);notificationPacketListener = new NotificationPacketListener(this);handler = new Handler();taskList = new ArrayList<Runnable>();reconnection = new ReconnectionThread(this);}

下面看看PersisitentConnectionListener,

这个类名字上看，就是给现有的连接进行监听的类

 public PersistentConnectionListener(XmppManager xmppManager) {        this.xmppManager = xmppManager; }

从构造方法上看，这个类监听的是XmppManager,剩下一些方法，都是监听连接情况的Log日志。

下面是NotificationPacketListener类，和PersistentConnectionListener结构差不多，主要看他的processPacket方法：

  public void processPacket(Packet packet) {        Log.d(LOGTAG, "NotificationPacketListener.processPacket()...");        Log.d(LOGTAG, "packet.toXML()=" + packet.toXML());        if (packet instanceof NotificationIQ) {            NotificationIQ notification = (NotificationIQ) packet;            if (notification.getChildElementXML().contains(                    "androidpn:iq:notification")) {                String notificationId = notification.getId();                String notificationApiKey = notification.getApiKey();                String notificationTitle = notification.getTitle();                String notificationMessage = notification.getMessage();                //                String notificationTicker = notification.getTicker();                String notificationUri = notification.getUri();                Intent intent = new Intent(Constants.ACTION_SHOW_NOTIFICATION);                intent.putExtra(Constants.NOTIFICATION_ID, notificationId);                intent.putExtra(Constants.NOTIFICATION_API_KEY,                        notificationApiKey);                intent                        .putExtra(Constants.NOTIFICATION_TITLE,                                notificationTitle);                intent.putExtra(Constants.NOTIFICATION_MESSAGE,                        notificationMessage);                intent.putExtra(Constants.NOTIFICATION_URI, notificationUri);                //                intent.setData(Uri.parse((new StringBuilder(                //                        "notif://notification.androidpn.org/")).append(                //                        notificationApiKey).append("/").append(                //                        System.currentTimeMillis()).toString()));                xmppManager.getContext().sendBroadcast(intent);                            }        }

ReconnectionThread类：

这个是一个负责重连的线程类

 private final XmppManager xmppManager;    private int waiting;//等待时间    ReconnectionThread(XmppManager xmppManager) {        this.xmppManager = xmppManager;        this.waiting = 0;//初始化等待时间是0    }

 public void run() {        try {            while (!isInterrupted()) {//                Log.d(LOGTAG, "Trying to reconnect in " + waiting()                        + " seconds");                Thread.sleep((long) waiting() * 1000L);                xmppManager.connect();                waiting++;            }        } catch (final InterruptedException e) {            xmppManager.getHandler().post(new Runnable() {                public void run() {                    xmppManager.getConnectionListener().reconnectionFailed(e);                }            });        }    }