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。
小结Android和iOS中LocalNotification
时间： 2024-08-24 13:13:07