可能是由于以下几个原因导致的:
<uses-permission android:name="android.permission.VIBRATE" />
。alarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, pendingIntent)
。NotificationCompat.Builder builder = new NotificationCompat.Builder(context, channelId)
.setSmallIcon(R.drawable.notification_icon)
.setContentTitle("Notification Title")
.setContentText("Notification Content")
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
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