MQTT的Demo展示

package com.tokudu.demo; import java.io.IOException; import com.ibm.mqtt.IMqttClient; import com.ibm.mqtt.MqttClient; import com.ibm.mqtt.MqttException; import com.ibm.mqtt.MqttPersistence; import com.ibm.mqtt.MqttPersistenceException; import com.ibm.mqtt.MqttSimpleCallback; import android.app.AlarmManager; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.IBinder; import android.util.Log; import com.tokudu.demo.SystemApplication; /* * PushService that does all of the work. * Most of the logic is borrowed from KeepAliveService. * http://code.google.com/p/android-random/source/browse/trunk/TestKeepAlive/src/org/devtcg/demo/keepalive/KeepAliveService.java?r=219 */ public class PushService extends Service { // this is the log tag public static final String TAG = "DemoPushService"; // the IP address, where your MQTT broker is running. private static final String MQTT_HOST = "59.125.190.113"; // the port at which the broker is running. private static int MQTT_BROKER_PORT_NUM = 1883; // Let's not use the MQTT persistence. private static MqttPersistence MQTT_PERSISTENCE = null; // We don't need to remember any state between the connections, so we use a clean start. private static boolean MQTT_CLEAN_START = true; // Let's set the internal keep alive for MQTT to 15 mins. I haven't tested this value much. It could probably be increased. private static short MQTT_KEEP_ALIVE = 60 * 15; // Set quality of services to 0 (at most once delivery), since we don't want push notifications // arrive more than once. However, this means that some messages might get lost (delivery is not guaranteed) private static int[] MQTT_QUALITIES_OF_SERVICE = { 0 } ; private static int MQTT_QUALITY_OF_SERVICE = 0; // The broker should not retain any messages. private static boolean MQTT_RETAINED_PUBLISH = false; // MQTT client ID, which is given the broker. In this example, I also use this for the topic header. // You can use this to run push notifications for multiple apps with one MQTT broker. public static String MQTT_CLIENT_ID = "heran"; // These are the actions for the service (name are descriptive enough) private static final String ACTION_START = MQTT_CLIENT_ID + ".START"; private static final String ACTION_STOP = MQTT_CLIENT_ID + ".STOP"; private static final String ACTION_KEEPALIVE = MQTT_CLIENT_ID + ".KEEP_ALIVE"; private static final String ACTION_RECONNECT = MQTT_CLIENT_ID + ".RECONNECT"; // Connection log for the push service. Good for debugging. private ConnectionLog mLog; // Connectivity manager to determining, when the phone loses connection private ConnectivityManager mConnMan; // Notification manager to displaying arrived push notifications private NotificationManager mNotifMan; // Whether or not the service has been started. private boolean mStarted; // This the application level keep-alive interval, that is used by the AlarmManager // to keep the connection active, even when the device goes to sleep. private static final long KEEP_ALIVE_INTERVAL = 1000 * 60 * 28; // Retry intervals, when the connection is lost. private static final long INITIAL_RETRY_INTERVAL = 1000 * 10; private static final long MAXIMUM_RETRY_INTERVAL = 1000 * 60 * 30; // Preferences instance private SharedPreferences mPrefs; // We store in the preferences, whether or not the service has been started public static final String PREF_STARTED = "isStarted"; // We also store the deviceID (target) public static final String PREF_DEVICE_ID = "deviceID"; // We store the last retry interval public static final String PREF_RETRY = "retryInterval"; // Notification title public static String NOTIF_TITLE = "Tokudu"; // Notification id private static final int NOTIF_CONNECTED = 0; // This is the instance of an MQTT connection. private MQTTConnection mConnection; private long mStartTime; // Static method to start the service public static void actionStart(Context ctx) { Intent i = new Intent(ctx, PushService.class); i.setAction(ACTION_START); ctx.startService(i); } // Static method to stop the service public static void actionStop(Context ctx) { Intent i = new Intent(ctx, PushService.class); i.setAction(ACTION_STOP); ctx.startService(i); } // Static method to send a keep alive message public static void actionPing(Context ctx) { Intent i = new Intent(ctx, PushService.class); i.setAction(ACTION_KEEPALIVE); ctx.startService(i); } @Override public void onCreate() { super.onCreate(); log("Creating service"); mStartTime = System.currentTimeMillis(); try { mLog = new ConnectionLog(); Log.i(TAG, "Opened log at " + mLog.getPath()); } catch (IOException e) { Log.e(TAG, "Failed to open log", e); } // Get instances of preferences, connectivity manager and notification manager mPrefs = getSharedPreferences(TAG, MODE_PRIVATE); mConnMan = (ConnectivityManager)getSystemService(CONNECTIVITY_SERVICE); mNotifMan = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); /* If our process was reaped by the system for any reason we need * to restore our state with merely a call to onCreate. We record * the last "started" value and restore it here if necessary. */ handleCrashedService(); } // This method does any necessary clean-up need in case the server has been destroyed by the system // and then restarted private void handleCrashedService() { if (wasStarted() == true) { log("Handling crashed service..."); // stop the keep alives stopKeepAlives(); // Do a clean start start(); } } @Override public void onDestroy() { log("Service destroyed (started=" + mStarted + ")"); // Stop the services, if it has been started if (mStarted == true) { stop(); } try { if (mLog != null) mLog.close(); } catch (IOException e) {} } @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); log("Service started with intent=" + intent); // Do an appropriate action based on the intent. if (intent.getAction().equals(ACTION_STOP) == true) { stop(); stopSelf(); } else if (intent.getAction().equals(ACTION_START) == true) { start(); } else if (intent.getAction().equals(ACTION_KEEPALIVE) == true) { keepAlive(); } else if (intent.getAction().equals(ACTION_RECONNECT) == true) { if (isNetworkAvailable()) { reconnectIfNecessary(); } } } @Override public IBinder onBind(Intent intent) { return null; } // log helper function private void log(String message) { log(message, null); } private void log(String message, Throwable e) { if (e != null) { Log.e(TAG, message, e); } else { Log.i(TAG, message); } if (mLog != null) { try { mLog.println(message); } catch (IOException ex) {} } } // Reads whether or not the service has been started from the preferences private boolean wasStarted() { return mPrefs.getBoolean(PREF_STARTED, false); } // Sets whether or not the services has been started in the preferences. private void setStarted(boolean started) { mPrefs.edit().putBoolean(PREF_STARTED, started).commit(); mStarted = started; } private synchronized void start() { log("Starting service..."); // Do nothing, if the service is already running. if (mStarted == true) { Log.w(TAG, "Attempt to start connection that is already active"); return; } // Establish an MQTT connection connect(); // Register a connectivity listener