In my Android application I would like to set alarm at a particular time with some message for time entered by user.
How can I set alarm using broadcast receiver? Is it possible to pop up a message on the specified time other than the default message?
AlarmManager alr = (AlarmManager) this.getSystemService(ALARM_SERVICE);
Intent intent = new Intent("YourAction");
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0/** som unique id*/, intent, 0);
alr.set(AlarmManager.ELAPSED_REALTIME, 0/** here is a delay*/, pendingIntent);
after that you should create a BroadcastReceiver, that will get intent with action = "YourAction". From that receiver you can start an activity which will shoiw you the dialog with your custom messages. See this answer to see how to setup the BroadcastReceiver.
Related
I am trying to use AlarmManager.AlarmClockInfo to set an alarm.
The constructor to this takes the time and a PendingIntent which is described in the docs as:
an intent that can be used to show or edit details of the alarm clock.
and then setAlarmClock( ) also takes in a pending intent which is described in the docs as:
Action to perform when the alarm goes off
I understand the use of the PendingIntent by setAlarmClock( ), however, how is the PendingIntent used by AlarmClockInfo and how do I use it to edit the details of the alarm clock?
however, how is the PendingIntent used by AlarmClockInfo and how do I use it to edit the details of the alarm clock?
Quoting myself from this book:
The biggest issue with setAlarmClock() is that it is visible to the
user:
The user will see the alarm clock icon in their status bar, as if
they had set an alarm with their device's built-in alarm clock app
The user will see the time of the alarm when they fully slide open
their notification shade
Tapping on the alarm time in the notification shade will invoke
the PendingIntent that you put into the AlarmClockInfo object
So, given this code...:
static void scheduleAlarms(Context ctxt) {
AlarmManager mgr=
(AlarmManager)ctxt.getSystemService(Context.ALARM_SERVICE);
Intent i=new Intent(ctxt, PollReceiver.class);
PendingIntent pi=PendingIntent.getBroadcast(ctxt, 0, i, 0);
Intent i2=new Intent(ctxt, EventDemoActivity.class);
PendingIntent pi2=PendingIntent.getActivity(ctxt, 0, i2, 0);
AlarmManager.AlarmClockInfo ac=
new AlarmManager.AlarmClockInfo(System.currentTimeMillis()+PERIOD,
pi2);
mgr.setAlarmClock(ac, pi);
}
(from this sample project)
...when the user taps on the time in the notification shade, EventDemoActivity will appear. The idea is that you should supply an activity here that allows the user to cancel or reschedule this alarm.
i developed an android app to fire notification by alarm manager .
Now I want to cancel one alarm that fire a notification i saw this code but it deletes all alarms
how can i delete one alarm i want
Intent intent = new Intent(this, AlarmReceive.class);
PendingIntent sender = PendingIntent.getBroadcast(this,
0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
// this line for cancellation
alarmManager.cancel(sender);
The doc of cancel says:
Remove any alarms with a matching Intent. Any alarm, of any type, whose Intent matches this one (as defined by filterEquals(Intent)), will be canceled.
So, if you want to be able to delete a specific intent you must be able to differentiate all the intent you are launching.
If your intent is an explicit one, I suggest adding an Action after its creation.
In this way the filterEquals will take that into account and delete only the relevant one.
Something like:
Intent intentYouWantToCancel = new Intent(this, AlarmReceive.class);
intentYouWantToCancel.setAction("aRelevantString");
when you set the alarmmanager as well as when you want to delete it.
My app will have several alarms set simultaneously. Unfortunately, each alarm is being set with the same PendingIntent object. Here's the code I'm using to set the alarm:
//Use AlarmManager to trigger the notification/alarm.
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
//PendingIntent to launch activity when the alarm triggers.
Intent i = new Intent("com.testapp.DisplayNotification");
//Assign the reminder's primary key as the notification ID.
i.putExtra("Reminder_Name", editRemindMeTo.getText().toString());
i.putExtra("Reminder_Primary_Key", reminderPrimaryKey);
PendingIntent displayIntent = PendingIntent.getActivity(
getBaseContext(), 0, i, 0);
//Set the alarm to trigger.
alarmManager.set(AlarmManager.RTC_WAKEUP,
c.getTimeInMillis(), displayIntent);
I know that I can delete an alarm by using the following code:
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent i = new Intent(context, MyPendingIntentService.class);
PendingIntent displayIntent = PendingIntent.getService(context, 0, i, 0);
alarmManager.cancel(displyIntent);
However, using this code will delete ALL my alarms (correct me if I'm wrong here). Is there a way to delete just the alarm that a user has deleted from the database? The alarm should be deleted from my app right after the user deletes an alarm entry in my app's database. I'm guessing that using different PendingIntent names would be the way to go, but I have no idea how to do this for each new alarm that a user creates. Thoughts on how to do this? Thanks!
See the same problem i faced here previously...
So the solution is to pass unique pending intent to the alarm service.. So here i how it can be done
PendingIntent pIntent = PendingIntent.getBroadcast(context, (int) alarm_id, intent, PendingIntent.FLAG_CANCEL_CURRENT);
here in the pending intent i have passed unique request id to the pending intent. Which you have to remember while cancelling the alarm.
So in my case what i have done to generate the unique id is put it in the database i have retrieved the id of the tables row and passed to the pending Intent.
So if you want to cancel the particular alarm you have to remember the same request id of the pending intent with the use of the same table entry...
I am sure it will work..
Use a different requestCode when registering each alarm. This is the second parameter of PendingIntent.getActivity/Service().
From the Android Documentation, cancel() will cancel all alarms with same pendingIntent. So the only way out is to create different pendingIntents. OR you could resort to scheduling repeating alarms as well, in this way you could use the same pendingIntents.
I want to create a broadcast receiver that will get notified when an alarm is started.
For example I set the alarm to 10 am and I go to sleep, then when the alarm is fired I want to have an receiver that will be notified.
Is it possible to do this ?, is there any intent that is fired on alarm start ?
For setting alarm use Alarm-manager class. You can set alarm using pending intent and using calendar you can set the time. Check the following code, in this AlarmReceiever is broadcast receiver which receives intent from pending intent at specific time that you can set in set method as second parameter .
Intent alaram=new Intent(FirstActivity.this,AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(FirstActivity.this, 0, alaram,PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP,cal.getTimeInMillis(),pendingIntent);
//cal.setTimeInMillis(System.currentTimeMillis());
cant you use pendingIntent too!! just saying
It appears that there is no standart alarm used by alarm applications. So either you have to look up used alarm in your logs and use it ( this will be alarm application dependent, and
surely not portable ) or just use alarm manager and schedule your own alarm
When setting a service to go off at particular time, I use the AlarmManager system service.
Everything goes off without a problem, service is called and actions take place.
When the alarm time is reached, the service starts, and at this point I get the system time (System.currentTimeMillis()). I'm guessing this wont be the actual time the service start. Is there a way to get the time that was set for this PendingIntent?
ie
Set alarm for 9am.
DoStuffService starts at 9am.
DoStuffService knows it was supposed to start at 9am, and uses this value for future functions.
When you create an intent for your alarm, you could put extra data, including time of the alarm, into it like this:
Intent intent = new Intent("action name");
//put extra data into the intent:
intent.putExtra("alarm_time_hours", hours);
intent.putExtra("alarm_time_minutes", minutes);
PendingIntent sender = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), sender);
Then in your receiver or service you need to get this extra data from received intent. Use something like this:
Bundle bundle = intent.getExtras();
if(bundle.containsKey("alarm_time_hours")) {
int hours = bundle.getInt("alarm_time_hours");
}
if(bundle.containsKey("alarm_time_minutes")) {
int minutes = bundle.getInt("alarm_time_minutes");
}
Is there a way to get the time that was set for this PendingIntent?
No, sorry.
However, it should not be terribly difficult for you to determine it yourself. Following your example, if your service reports that it is now 09:00:02.36, you should be able to round down to determine that this is the 9am alarm.