小结Android和iOS中LocalNotification
时间：2014-05-12 11:38:52
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用Unity开发游戏，总难免要用到Native Development，比如Notification功能。
本文只对LocalNotification进行小结，iOS上RemoteNotification在此未讨论。（后面发现Unity已经把iOS部分给封装好了）
Notification大致提供了两个功能:Register和Cancel，没找到Update的API，后来自己想了个Update的方法，就是先Cancel再Register.
iOS:
1 //由于c#用long类型传递秒数，而long类型在C#中是64位，在OC中是32位，这样会导致后面参数读取出现问题，所以这边senconds用int64_t代替（也可用long long） 2 + (void) registerLocalNotification:(int64_t)seconds withMessage:(NSString *)msg notificationId:(NSString*) notificationId 3 { 4 UILocalNotification *notification = [[UILocalNotification alloc] init]; 5 NSDate *now = [NSDate date]; 6 //通知触发的时间 7 notification.fireDate = [now dateByAddingTimeInterval:(NSTimeInterval)seconds]; 8 //显示在通知中的信息 9 notification.alertBody = msg; 10 //通知显示时的提示音 11 notification.soundName = UILocalNotificationDefaultSoundName; 12 //桌面应用程序图标右上角显示的消息个数，这里每个消息都标记为1 13 notification.applicationIconBadgeNumber++; 14 15 //设置通知标识符，以便后面取消该通知使用，如果不做取消，可不设置 16 NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:notificationId, NOTIFICATION_ID, nil]; 17 notification.userInfo = dict; 18 19 //注册通知 20 [[UIApplication sharedApplication] scheduleLocalNotification:notification]; 21 } 22 23 //API没Update操作，故用先Cancel再Register来解决 24 + (void) updateLocalNotification:(int64_t)seconds withMessage:(NSString *)msg notificationId:(NSString *)notificationId 25 { 26 [Notifier cancelLocalNotification:notificationId]; 27 [Notifier registerLocalNotification:seconds withMessage:msg notificationId:notificationId]; 28 } 29 30 + (void) cancelLocalNotification:(NSString *)notificationId 31 { 32 //获取当前应用程序已注册的所有本地通知 33 NSArray *notifications = [[UIApplication sharedApplication] scheduledLocalNotifications]; 34 for (UILocalNotification *notification in notifications) 35 { 36 //通过匹配原先注册时标记的Id号来查找 37 if ([[notification.userInfo objectForKey:NOTIFICATION_ID] isEqualToString:notificationId]) 38 { 39 [[UIApplication sharedApplication] cancelLocalNotification:notification]; 40 break; 41 } 42 } 43 }
Android:
1 public class Notifier { 2 3 /* 4 * 由于Notification.when不起作用，故需要延时操作时采用postAtTime(Runnable r, Object token, long uptimeMillis) 5 * 其中token用来标记该runnable，以便后面取消用 6 * 注意：如果到了触发通知时，应用程序不在后台运行，则不会弹出通知，即app必须处于运行状态才有效 7 */ 8 private static boolean initialized = false; 9 private static Handler mHandler; 10 private static Handler getHandler() { 11 if (!initialized) { 12 initialized = true; 13 HandlerThread thread = new HandlerThread("Notifier"); 14 thread.start(); 15 mHandler = new Handler(thread.getLooper()); 16 } 17 return mHandler; 18 } 19 20 @SuppressWarnings("deprecation") 21 public static void registerLocalNotification(final Context context, final long seconds , final String message, final int notificationId) { 22 23 final Notification notification = new Notification(); 24 Resources res = context.getResources(); 25 int app_icon = res.getIdentifier("app_icon", "drawable", context.getPackageName()); 26 int app_name = res.getIdentifier("app_name", "string", context.getPackageName()); 27 String title = context.getString(app_name); 28 notification.icon = app_icon; //图标一定要设置正确，不正确会导致通知栏无法显示 29 long[] vibrate = {0, 100, 200, 300}; // 0ms后 震动100ms，200ms后震动300ms,用振动时，需在AndroidManifest声明android.permission.VIBRATE权限 30 notification.vibrate = vibrate; 31 notification.defaults |= Notification.DEFAULT_SOUND; 32 notification.flags |= Notification.FLAG_AUTO_CANCEL; 33 notification.when = System.currentTimeMillis() + seconds * 1000; 34 notification.tickerText = message; 35 36 Intent intent = new Intent(context, context.getClass()); 37 PendingIntent contentIntent = PendingIntent.getActivity(context, app_name, intent, PendingIntent.FLAG_UPDATE_CURRENT); 38 notification.setLatestEventInfo(context, title, message, contentIntent); 39 40 getHandler().postAtTime(new Runnable() { 41 @Override 42 public void run() { 43 if (Utils.isAppOnBackground(context)) { 44 getNotificationManager(context).notify(notificationId, notification); 45 } 46 } 47 }, Integer.toString(notificationId), SystemClock.uptimeMillis() + seconds * 1000); 48 } 49 50 private static NotificationManager getNotificationManager(Context context) { 51 return (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); 52 } 53 54 public static void updateLocalNotification(Context context, long seconds, String message, int notificationId) { 55 getHandler().removeCallbacksAndMessages(Integer.toString(notificationId)); 56 registerLocalNotification(context, seconds, message, notificationId); 57 } 58 59 public static void cancelLocalNotification(int notificationId) { 60 getHandler().removeCallbacksAndMessages(Integer.toString(notificationId)); 61 } 62 }
Android版本由于在应用程序处于前台时也会显示通知，所以我在触发通知的地方做了应用程序是否处于后台的判断
1 public static boolean isAppOnBackground(Context context) { 2 ActivityManager activityManager = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE); 3 List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses(); 4 for (RunningAppProcessInfo appProcess : appProcesses) { 5 if (appProcess.processName.equals(context.getPackageName())) { 6 if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND) { 7 return true; 8 } else { 9 return false; 10 } 11 } 12 } 13 return false; 14 }
好了，关于LocalNotification的小结就到这了。如果读者有什么疑惑，可以回复下，大家一起探讨，互相学习。
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