My application schedules multiple alarms for particular times. These alarms are scheduled when the application starts. (For each day there are 5 alarms resulting in 35 alarms per week)...
I have verified through logs that these alarms are scheduled when the application starts.
The problem is when I started testing my application the 7 alarms goes off perfectly fine. However the 8th alarm doesn't fired. I have tested this scenario by keeping my device still for more than 1 day. How can I debug this behaviour and what are the possible reasons that prevent alarm for firing.
Edit:
Code for scheduling:
try {
if (info != null) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR, year);
c.set(Calendar.MONTH, month);
c.set(Calendar.DAY_OF_MONTH, day);
c.set(Calendar.HOUR_OF_DAY, info.getHour());
c.set(Calendar.MINUTE, info.getMinute());
c.set(Calendar.SECOND, 0);
Intent intent = new Intent(context, AlarmReceiverActivity.class);
intent.putExtra("name", info.getPrayerName());
intent.putExtra("sound", soundType);
intent.putExtra("time", formatTimeClock(context, info.getHour(), info.getMinute()));
PendingIntent pendingIntent = PendingIntent.getActivity(context, alarmId, intent, PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingIntent);
}
} catch (Exception e) {
Log.e("ALarmSchedularManager", e.getMessage());
}
How can I debug this behaviour
Use adb shell dumpsys alarm to see what your scheduled alarms are and when they are next to be invoked.
what are the possible reasons that prevent alarm for firing
Your code does not appear take into account the possibility that the time has already passed, though that may be handled outside the code snippet you show above.
Hopefully below code will help, I used the same in my app. Here the argument passed in AlarmManager class for repeating should be 24*60*60*1000
AlarmManager am = (AlarmManager) ct.getSystemService(Context.ALARM_SERVICE);
Intent intent1 = new Intent(ct, TimeAlarm.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(ct, 0,intent1, PendingIntent.FLAG_CANCEL_CURRENT);
Date curr=new Date();
curr.setHours(h);
curr.setMinutes(m);
c.setTime(curr);
c.set(Calendar.SECOND, 0);
Calendar c1 = Calendar.getInstance();
am.setRepeating(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(),24*60*60*1000, pendingIntent);
instead of hard code manipulation (24*60*60*1000) you can use AlarmManager.INTERVAL_DAY. Check this for different interval upto 1 day http://developer.android.com/reference/android/app/AlarmManager.html#INTERVAL_DAY
Related
Below is the code I am using to create alarms when data is pulled from external API. If the time set is in the past, the alarm goes off as soon as it is set(2 second gap). For example if I set the alarm for 8:00 AM, 10th April at 10:00 AM on 11th April(Past time). It starts the alarm as soon as it is set.
public static final int ALARM_REQUEST_CODE = 1001;
public static AlarmManager alarmManager = (AlarmManager) EHCApplication.getInstance().getApplicationContext().getSystemService(Context.ALARM_SERVICE);
public static Intent alarmIntent = new Intent(EHCApplication.getInstance().getApplicationContext(), AlarmReceiver.class);
public static PendingIntent pendingIntent = PendingIntent.getBroadcast(EHCApplication.getInstance().getApplicationContext(), ALARM_REQUEST_CODE, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
public static void setAlarm(Reminder rm) {
for (ScheduledTime time : rm.getScheduledTime()) {
Bundle bundle = new Bundle();
bundle.putParcelable(Constants.ARGS_SELECTED_MEDICINE, medicine);
alarmIntent.putExtras(bundle);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, time.getTimeInMilliseconds(), AlarmManager.INTERVAL_DAY, pendingIntent);
}
}
I am expecting the alarm to go off from next time it hit the time. Where am I making mistake?
This is the expected behavior.
From the documentation of setRepeating() (and other AlarmManager set methods):
If the stated trigger time is in the past, the alarm will be triggered
immediately
If you would like to prevent that happening, then simply do not set alarms with a past trigger time (e.g. check against System.currentTimeMillis() when setting the alarm).
Well, I ran into same problem and after studying I found that alarm will be run as soon when past time is set for the alarm.
Source: Here is documentation of Alarm Manager - setRepeating()
So, I resolved the issue by checking if "Calendar time is in past from system time than I add a day"
Working code:
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, min);
calendar.set(Calendar.SECOND, 0);
alarmManager.cancel(pendingIntent);
// Check if the Calendar time is in the past
if (calendar.getTimeInMillis() < System.currentTimeMillis()) {
Log.e("setAlarm","time is in past");
calendar.add(Calendar.DAY_OF_YEAR, 1); // it will tell to run to next day
}
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, id, myIntent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent); //Repeat every 24 hours
I have read many articles, but non seems to work for me!
I have to schedule a repeating task with AlarmManager for everyday at 7:15. The following method is set in an activity and registered a broadcast receiver for it!
private void setTask(Context context) {
Calendar updateTime = Calendar.getInstance();
updateTime.setTimeZone(TimeZone.getTimeZone("GMT"));
updateTime.set(Calendar.HOUR_OF_DAY, 7);
updateTime.set(Calendar.MINUTE, 15);
Intent intent = new Intent(context, NotifyUpdate.class);
PendingIntent fireAlarm = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarms = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarms.setRepeating(alarms.RTC_WAKEUP, updateTime.getTimeInMillis(), alarms.INTERVAL_DAY, fireAlarm);
}
The problem is when I run the app the method gets executed immediately regardless of the time set, but not executing at (7:15).
Any Idea?
Try this before setting alarm
Calendar now = Calendar.getInstance();
if (updateTime.before(now)) {
updateTime.add(Calendar.DAY_OF_MONTH, 1); // if its in the past increment
}
alarms.setRepeating(alarms.RTC_WAKEUP, updateTime.getTimeInMillis(), alarms.INTERVAL_DAY, fireAlarm);
You said that you have immediate triggering not depending on time. It's happening because updateTime-object references at time in the past, so the goal is to set an alarm to 7:15 in the future. This will help to avoid immediate triggering.
I have 2 alarms set, one for notifications, and the other one to do some tasks. My problem is that only one alarm seems to work( the notifications service one, the first alarm set). The Other alarm never goes off. Here is my code :
Intent myIntent1 = new Intent(getApplicationContext(), NotificationService.class);
PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(), 0, myIntent1, 0);
AlarmManager alarmManager1 = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
Calendar calendar1 = Calendar.getInstance();
calendar1.setTimeInMillis(System.currentTimeMillis());
long frequency1 = 30 * 1000; // in ms
alarmManager1.setRepeating(AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(), frequency1, pendingIntent);
// Set alarm to fire go to Next day everyday at the same time
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14); // For 1 PM or 2 PM
calendar.set(Calendar.MINUTE, 57);
calendar.setTimeInMillis(System.currentTimeMillis());
Intent myintent = new Intent(getApplicationContext(), AlarmNextDayService.class);
AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
PendingIntent pi = PendingIntent.getService(getApplicationContext(), 11, myintent,0 );
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY, pi);
Any suggestions are welcome. I have looked atother sources as well nothing works for me till now.
I have also added alarm permisison in the manifest file as the following :
<uses-permission android:name="com.android.alarm.permission.SET_ALARM"/>
Thank you
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 14); // For 1 PM or 2 PM
calendar.set(Calendar.MINUTE, 57);
calendar.setTimeInMillis(System.currentTimeMillis());
You are setting the HOUR_OF_DAY and the MINUTE but them you override that by calling setTimeInMillis(System.currentTimeMillis());
After that you set the alarm with the calendar.getTimeMillis() value which is already in the past, so the alarm is cancelled I think.
You're most likely seeing an issue because a Service is not guaranteed to run when triggered by an alarm, due to power save. If your device is on battery and idle when that alarm goes off, it will not trigger until the next time the device is full on or on AC power. You'll need to use a BroadcastReceiver which holds a wake lock which is then released by the Service when it is done. The WakefulBroadcastReceiver makes this a little easier to handle. This article will help provide more details.
In my android app, I have two services which are supposed to run timely.
One will run on a fixed date and the other will run on 11:00 PM everyday.
To achieve this, I have created services and used Alarm manager to start them at fixed time.
private void scheduleAlarmForCleanup(){
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.SECOND, 00);
Intent pendingIntent = new Intent(this, CleanupService.class);
PendingIntent pintent = PendingIntent.getService(this, 0, pendingIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 24*60*60*1000 , pintent);
}
Now I have called this function in my Activity's onCreate.
But onCreate can be called multiple times during a day
and my concern is this will lead to multiple calls to this function.
What effect can this have ?
Would the Alarm be set multiple times.
Is there a way by which I can check whether my alarm is already set and in that case I won't try to set alarm again.
Each time, you will have to try to cancel the alarm and set it again.
try
{
// This block will cancel the alarm if already available. Else throw an
// exception which will be ignored
alarmManager.cancel(pintent);
}catch (Exception ignored){ }
// After try block, set the manager again.
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 24*60*60*1000 , pintent);
I'm using the AlarmManager class to notify the user everyday in specific time (user will choose the time from time picker)
every thing worked great al7mdllah ^^
But I want to get that time from the alarmManger and display it in the application to get a better UX
is there any way to get the alarm time?
Here's my code
public void witer_reminder(View view)
{
am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, Witer_Notification.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
intent, PendingIntent.FLAG_CANCEL_CURRENT);
Calendar cal = Calendar.getInstance();
Calendar calSet = (Calendar) cal.clone();
calSet.set(Calendar.HOUR_OF_DAY, picker.getCurrentHour());
calSet.set(Calendar.MINUTE,picker.getCurrentMinute());
calSet.set(Calendar.SECOND, 0);
calSet.set(Calendar.MILLISECOND, 0);
if(calSet.compareTo(cal) <= 0){
//Today Set time passed, count to tomorrow
calSet.add(Calendar.DATE, 1);
}
am.setRepeating(AlarmManager.RTC_WAKEUP, calSet.getTimeInMillis(),
24*60*60*1000, pendingIntent);
}
But I want to get that time from the alarmManger and display it in the application to get a better UX is there any way to get the alarm time?
Save it yourself somewhere persistent (file, database, SharedPreferences) when you set up the event. AlarmManager is write-only; you cannot retrieve information about scheduled events from it.