Connect alarm to labmanager1/28/2024 ![]() * this way we can get alarms even when device is in sleep mood * then we can add this span to 'elapsedRealTime' to fire the alarm at that time * we need to know the span between current time and the time of alarm. * to use elapsed realTime monotonic clock, and fire alarm at a specific time public static String setAlarm(int hour, int minutes, long repeatInterval, to hold alarms and cancel when needed public static ArrayList alarmIntens = new ArrayList() because i am firing many alarms of this type. The variable 'intentName' is used in the intentFilter to receiver this alarm. in below code i am using AlarmManager.ELAPSED_REALTIME_WAKEUP I programmed this problem in my own project this way. Intent broadcasts to find out when the time changes.Īlso, the question only referenced only the *_WAKEUP alarms but see also the AlarmManager documentation on that to make sure you understand what the wakeup vs non-wakeup alarms provide. System.currentTimeMillis(), consider listening to theĪCTION_TIME_TICK, ACTION_TIME_CHANGED and ACTION_TIMEZONE_CHANGED Measurements should use a different clock. In a calendar or alarm clock application. This clock should only be used whenĬorrespondence with real-world dates and times is important, such as SetCurrentTimeMillis(long)), so the time may jump backwards orįorwards unpredictably. The wall clock can be set by the user or the phone network (see May also trigger the alarm 60 seconds from now, but not reliably, because as noted in the SystemClock documentation: So, t(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() Whereas, AlarmManager.RTC_WAKEUP is for the the standard "wall" time in milliseconds since the epoch. Will make your PendingIntent fire in 1 min (60*1000 milliseconds). So, t(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() Using ELAPSED_REALTIME_WAKEUP with AlarmManager will rely on a monotonic clock starting from boot time " and continues to tick even when the CPU is in power saving modes, so is the recommend basis for general purpose interval timing". Despite the currently accepted and up-voted answer, AlarmManager.ELAPSED_REALTIME* types along with SystemClock.elapsedRealtime() has always been more reliable than the RTC clocks for alarms and timing.
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