Every thing you could learn about including Notifications with Alarm Supervisor in Android | by Naman Garg | Sep, 2022 | Mono Tech

almost Every thing you could learn about including Notifications with Alarm Supervisor in Android | by Naman Garg | Sep, 2022 will cowl the most recent and most present steerage on this space the world. means in slowly fittingly you perceive capably and accurately. will deposit your information precisely and reliably

Photograph by Daria Nepriakhina 🇺🇦 on Unsplash

Android supplies a characteristic that permits you to schedule notifications for later. That is helpful if customers/builders must do one thing later. For instance, when you want the person to remind you of some activity that you just set sooner or later in a to-do record software. This weblog makes use of AlarmManager and Broadcast Receivers to attain the identical factor on Android API degree 26 or larger.

Word → We is not going to be utilizing the WorkManager API to schedule alarms, as alarms are a particular use case and are usually not a part of the background work. Additionally, the really useful strategy to run precise time jobs is AlarmManager.

Step 1: Configure the info class:

Since I’ve used this knowledge class with RoomDatabase, it’s annotated with Entity however not wanted in any other case. Nonetheless, the principle factor is ID discipline 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 will likely 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 foremost issues to think about when including a notification are:

  1. setContentIntent() = A pending intent is required that will likely be triggered when a person faucets the notification. PendingIntent right here takes 4 parameters that are context, Request code, intention, and a flag. Be certain that so as to add one of many flags like FLAG_IMMUTABLE as it’s required for the most recent APIs.
  2. setAutoCancel() = Determines whether or not or not the notification will disappear when the person faucets it.
  3. 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.
  4. NotificationCompat.Builder() = It’s wanted context Y Channel ID as parameters and we’ve got to guarantee that Channel ID is identical because the Channel ID we’ll 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, do not forget so as to add this class contained in the manifest file.

Step 3: Set the alarm

we will likely be utilizing the setAlarmClock() technique for setting an alarm as I discovered to be essentially the most dependable when setting a number of alarms sooner or later. There are a number of strategies to set an alarm, akin to:

  1. set()
  2. setExact()
  3. setInExactRepeating()
  4. setRepeating()
  5. setTime()
  6. setTimeZone()
  7. setAndAllowWhileIdle()
  8. setExactAndAllowWhileIdle()
  9. setWindow()

Within the setAlarm(activity data: activity data) perform, 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. Word that we’ve got used taskInfo.id Because the Request code which can guarantee that we’ve got completely different Request code for every alarm and thus have the ability to create a number of alarms with a number of notifications.

some issues concerning the setAlarmClock() –

With this technique, the alarm clock icon will seem within the person’s standing bar as if that they had set an alarm with their system’s built-in alarm clock app and when the person absolutely opens their notification, they may 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 kind, we have to add the TIME_EXACT_ALARM permission within the manifest file for the most recent APIs.

Step 4 – Create the notification channel

Beginning with Android 8.0 (API degree 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, akin 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 completely different for every channel and Channel Title it ought to describe primary details about the channel that the person can see inside the software info. It solely must be arrange as soon as and may be referred to as inside the onCreate() technique.

Step 5: Cancel the alarm (Elective)

Lets say that we’ve got an alarm scheduled for a activity that the person needs to finish; nonetheless, 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, nonetheless, one should be sure that the pendingAttempt used to cancel it should match the pendingAttempt we used to set the alarm, or else it is not going to cancel. It isn’t mandatory 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 system 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 system. This ensures that the AlarmManager will proceed to perform with out the person having to reset the alarm. We have to add a broadcast receiver class that receives a broadcast each time the system is rebooted.

Right here we’re getting the record 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 will let you obtain the stream when the system is restarted or turned on.

Word: On newer cell phones, you could manually allow the autoboot characteristic below 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 begin mechanically each time it receives the published.

Step 7: Add Motion Button (Elective)

As an example a person receives notification of a activity 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’ll add an motion button to finish a activity. Right here we is not going to open any exercise when the person touches the button, however we’ll 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 can obtain the published to carry out some motion when a activity completes. Contained in the AlarmReceiver class, we have to add yet another pending intent that will likely be answerable for opening the OnCompletedBroadcastReceiver class.

This class receives the taskInfo object when the person faucets the motion button and adjustments its state to true as the duty completes and updates it inside the room’s database utilizing the repository.

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


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