practically All the pieces it is advisable find out about including Notifications with Alarm Supervisor in Android | by Naman Garg | Sep, 2022 will cowl the newest and most present opinion all over the world. acquire entry to slowly because of this you comprehend competently and accurately. will accrual your data skillfully and reliably
Android gives a characteristic that lets you schedule notifications for later. That is helpful if customers/builders have to do one thing later. For instance, when you want the person to remind you of some process that you just set sooner or later in a to-do checklist software. This weblog makes use of AlarmManager and Broadcast Receivers to attain the identical factor on Android API stage 26 or increased.
Observe → We won’t be utilizing the WorkManager API to schedule alarms, as alarms are a particular use case and aren’t a part of the background work. Additionally, the advisable strategy to run precise time jobs is AlarmManager.
Step 1: Configure the information class:
Since I’ve used this information class with RoomDatabase, it’s annotated with Entity however not wanted in any other case. Nonetheless, the principle factor is ID area which is a major key and can then be used to arrange a number of notifications directly.
Step 2. Configure the BroadcastReceiver class:
This class shall be referred to as by our AlarmManager at some particular time sooner or later and this class will set off the notification at the moment. We have to add the notification inside this class. Some primary issues to contemplate when including a notification are:
- setContentIntent() = A pending intent is required that shall be triggered when a person faucets the notification. PendingIntent right here takes 4 parameters that are context, Request code, intention, and a flag. Be sure that so as to add one of many flags like FLAG_IMMUTABLE as it’s required for the newest APIs.
- setAutoCancel() = Determines whether or not or not the notification will disappear when the person faucets it.
- tapResultIntent.flags = You should definitely add the intent flag as per your comfort. I am utilizing FLAG_ACTIVITY_SINGLE_TOP as a result of this app makes use of a single exercise multi-fragment mannequin and in any occasion solely MainActivity exists on the prime of the stack and when a person faucets the notification when the app is within the foreground it would not create any new occasion of the train.
- NotificationCompat.Builder() = It’s wanted context Y Channel ID as parameters and we’ve to ensure that Channel ID is identical because the Channel ID we are going to use later to create the notification channel.
This class right here receives taskInfo object as intent to show notification description as taskInfo.description after which to carry out some duties once we add motion button to notification. Additionally, remember so as to add this class contained in the manifest file.
Step 3: Set the alarm
we shall be utilizing the setAlarmClock() methodology for setting an alarm as I discovered to be probably the most dependable when setting a number of alarms sooner or later. There are a number of strategies to set an alarm, equivalent to:
Within the setAlarm(process data: process data) operate, we first create an occasion of the alarm handler, after which set a pending intent to open the AlarmReciver class sooner or later, which can then set off the notification. Observe that we’ve used taskInfo.id Because the Request code which can ensure that we’ve totally different Request code for every alarm and thus be capable to create a number of alarms with a number of notifications.
some issues concerning the setAlarmClock() –
With this methodology, the alarm clock icon will seem within the person’s standing bar as if they’d set an alarm with their machine’s built-in alarm clock app and when the person absolutely opens their notification, they are going to see the alarm time . Tapping the alarm time on the notification will fireplace the PendingIntent that we specified within the AlarmClockInfo object which is basicPendingIntent right here.
Whereas establishing any precise alarm sort, we have to add the TIME_EXACT_ALARM permission within the manifest file for the newest APIs.
Step 4 – Create the notification channel
Beginning with Android 8.0 (API stage 26), all notifications have to be assigned to a channel. For instance, right here we are able to create three channels for various precedence duties set by customers, equivalent to low, medium and excessive, every with a unique picture and audio. NotificationChannel takes 3 parameters (channel_id, channel_name, precedence). Channel ID have to be totally different for every channel and Channel Identify it ought to describe primary details about the channel that the person can see throughout the software data. It solely must be arrange as soon as and may be referred to as throughout the onCreate() methodology.
Step 5: Cancel the alarm (Optionally available)
Lets say that we’ve an alarm scheduled for a process that the person needs to finish; nevertheless, it turned out that the person accomplished it a lot earlier. In such case, we have to cancel the alarm. It is extremely simple to cancel the alarm, nevertheless, one should be certain that the pendingAttempt used to cancel it should match the pendingAttempt we used to set the alarm, or else it won’t cancel. It isn’t essential to place the identical content material contained in the intention we used above as a result of the content material contained in the intention don’t match when evaluating pending intents. (as intent.putExtra)
Step 6: Including alarms when the machine restarts
When a tool is turned off, all alarms are canceled by default. To keep away from this, we have to design our app to mechanically reset the alarm if the person reboots the machine. This ensures that the AlarmManager will proceed to operate with out the person having to reset the alarm. We have to add a broadcast receiver class that receives a broadcast each time the machine is rebooted.
Right here we’re getting the checklist of all energetic alarms utilizing our repository and reconfiguring the alarms inside this class. Moreover, we should add RECEIVE_BOOT_COMPLETED permission within the Android manifest file together with the RebootBroadcastReceiver class and its intent filters. These intent filters help you obtain the stream when the machine is restarted or turned on.
Observe: On newer cell phones, it is advisable manually allow the autoboot characteristic beneath App Information → Battery Administration → Autoboot so that you can obtain the RECEIVE_BOOT_COMPLETED broadcast. It’s initially turned off for battery administration functions. Principally, it permits your software to start out mechanically each time it receives the printed.
Step 7: Add Motion Button (Optionally available)
For instance a person receives notification of a process and accomplished it, in that case the person wish to press a end/full button in order that it may be faraway from the queue of incomplete duties. Now we are going to add an motion button to finish a process. Right here we won’t open any exercise when the person touches the button, however we are going to do some work within the background. For this, we have to add some code contained in the AlarmReceiver class we created earlier and add one other broadcast receiver class that may obtain the printed to carry out some motion when a process completes. Contained in the AlarmReceiver class, we have to add yet one more pending intent that shall be chargeable for opening the OnCompletedBroadcastReceiver class.
Additionally, add this class within the AndroidManifest.xml file.
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Everything you need to know about adding Notifications with Alarm Manager in Android | by Naman Garg | Sep, 2022