All about Notifications in Android | by way of Shaik Ahron | Nov, 2022

You wish to have to have the channel identity with you. in order that notifications can fall into that specific channel which is needed from Android 8 and above. you wish to have to set the concern of notifications for Android 7 and under.

Step 3: Now, you wish to have handy over this notification to the Android device as appearing a notification isn’t a part of your app. You’ll want to move a novel notification identity for that notification.

with(NotificationManagerCompat.from(context)) {
notify(notificationId, builder.construct())
}

You might be finished

You are going to see a notification like this.

Updating a Notification:

To replace this notification after you’ve issued it, name NotificationManagerCompat.notify() once more, passing it a notification with the similar ID you used prior to now. If the former notification has been pushed aside, a brand new notification is created as an alternative.

Take away a notification:

You’ll be able to upload setAutoCancel to true or use NotificationManagerCompat and speak to cancel() with notification identity

Set lock display visibility:

To keep watch over the extent of element visual within the notification from the lock display.

you wish to have to name setVisibility() and for Android 8 and above

notificationChannel.lockscreenVisibility = Notification.VISIBILITY_SECRET

There are sorts of VISIBILITY

• VISIBILITY_PUBLIC that display the notification’s complete content material.
• VISIBILITY_SECRET does not display any a part of this notification at the lock display.
• VISIBILITY_PRIVATE displays fundamental data, such because the notification’s icon and the content material name, however hides the notification’s complete content material.

You’ll be able to upload as much as 3 movements in a notification.

Let’s see how we will upload an motion

Step 1: You wish to have a PendingIntent that may include an Intent it may be an task, broadcast receiver, and so on.

I’ve created a BroadCastReceiver and registered it in Manifest.xml

<receiver android:title=".broadcast_receiver.MyBroadCastReceiver"/>

Step 2: Create MyBroadCastReceiver.kt

Step 3: name addAction() on NotificationCompat Builder

builder.addAction(R.drawable.ic_launcher_background ,"Click on",addAction(context,"Click on Motion"))

Now, test the output

When You click on it you are going to get a log with the motion string won.

You’ll have observed direct replies in Chat Apps the place you’ll be able to upload any respond to a dialog. we will be able to be developing that direct answer motion.

Step 1: You wish to have to create a RemoteInput. it’s used to take reaction from a person as this enter isn’t a part of your app which is why it’s Far flung like RemoteViews.

You wish to have to move a String Key which we will be able to use later to get the reaction.

Step 2: Now we will be able to create a PendingIntent as we did above.

Step 3: Now create Motion Builder which is able to assist us to create a relation between the RemoteInput and PendingIntent.

NotificationCompat.Motion.Builder(
androidx.core.R.drawable.notification_action_background,
"Answer", replyPendingIntent)
.addRemoteInput(createRemoteInput())
.construct()

Step 4: Upload motion to the notification

.addAction(replyAction(context))

Let’s see the output

You’ll be able to see the RemoteInput.

now, whilst you click on ship icon. it’ll stay loading as we need to reply to this reaction.

Step 5: Now, we will be able to care for fetching answer textual content and replace notification.

to get the answer you wish to have to move the printed receiver’s intent and fetch the textual content.

right here we’re fetching the message and updating the similar notification the use of identity.

Now, when you click on ship icon. it’ll replace the notification.

6. Upload Growth Bar in Notification :

Now, We will be able to paintings on appearing development in Notification. You’ll have observed this to your telephone.

Step 1: Create a NotificationBuilder

Step 2: In builder, you wish to have to setProgress() with the utmost and present development of the duty for those who don’t know the development of the duty you’ll be able to use an indeterminate development bar.

so, to replace development. you wish to have to run a background assignment and replace the development.

for those who name the process. you are going to see this output.

If you wish to display an indeterminate development bar simply name

setProgress(0,0,true)

So, right here we will be able to see how we will get started an task with a correct navigation revel in for the person. To maintain this navigation revel in, you will have to get started the task with a contemporary assignment. It additionally depends upon the task you display at the faucet of notification.

Common task:

That is an task that exists as part of your app’s standard UX float. So when the person arrives within the task from the notification, the brand new assignment will have to come with an entire again stack, letting them press Again and navigate up the app hierarchy.

Particular task:

The person simplest sees this task if it’s began from a notification. In a way, this task extends the notification UI by way of offering data that will be exhausting to show within the notification itself. So this task does no longer want a again stack. It’s specifically created for Notification.

First, we check out common task pending intent.

TaskStackBuilder: it supplies a approach to obey the proper conventions round cross-task navigation.

To start out a “common task” out of your notification, arrange the PendingIntent the use of TaskStackBuilder in order that it creates a brand new again stack as follows.

Step 1: Outline the herbal hierarchy to your actions by way of including the android:parentActivityName characteristic to each and every <task> component to your app manifest record.

Step 2: To start out an task that features a again stack of actions, you wish to have to create an example of TaskStackBuilder and speak to addNextIntentWithParentStack(), passing it the Intent for the task, you wish to have to begin.

Step 3: Create notification builder and setContentIntent with resultIntent.

Right here, Whilst you faucet at the notification. you’ll be able to see no new assignment has been created however now for Particular actions you are going to see a brand new assignment will there.

Let’s get started opening a different task

Step 1: Cross to Manifest.xml and upload this in MainActivity2.

android:taskAffinity=""
android:excludeFromRecents="true"

assignment affinity blended with ACTIVITY_NEW_TASK will assist to not open task in an present assignment.

excludeFromRecents: this may occasionally mean you can to not to find this fresh UI after navigating again.

Step 2: Now, create a PendingIntent with intent having flag ACTIVITY_NEW_TASK.

val notifyIntent = Intent(context, MainActivity2::elegance.java).practice {
flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
}
val notifyPendingIntent = PendingIntent.getActivity(
context, 0, notifyIntent,
PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
)

Step 3: notify

So, now you’ll be able to see the brand new assignment and when you press again you are going to no longer see the brand new assignment in fresh.

For those who suppose your app notification will have to display additional info than Easy Notification. Then we will use Expanded Notification. It isn’t a brand new form of notification we will be able to simply upload taste and a couple of extra settings to the notification.

Now, so as to add a big symbol in a notification apply this

Right here, I’m the use of a couple of photographs. you’ll be able to use yours.

You simply have so as to add a mode title BigPictureStyle() and upload your bitmap.

you are going to see one thing like this

you’ll be able to upload this icon as a thumbnail like this

val notification = NotificationCompat.Builder(context, NotificationChannels.CHANNEL1)
.setSmallIcon(R.drawable.table)
.setContentTitle("imageTitle")
.setContentText("imageDescription")
.setStyle(NotificationCompat.BigPictureStyle()
.bigPicture(icon).bigLargeIcon(null))
.setLargeIcon(icon)
.construct()

bigLargIcon is null as a result of we don’t need to see this thumbnail in expanded shape.

You’ll be able to upload Massive Textual content as neatly

Subsequent up is, appearing dialog textual content.

Easy, use MessageStyle and speak to addMessage() with the message object.

One final is including media controls as we see in song participant apps.

we wish to upload this dependency

implementation "androidx.media:media:1.6.0"

So, right here as you’ll be able to see we’ve added 3 movements within the expanded and collapsed sorts of notification.

Merely, upload movements as we do in notifications but if including movements within the collapsed shape you utilize MediaStyle().

For collapsed shape, you name setActionsInCompatView() and setMediaSessionToken.

When you wish to have to get the person’s consideration for some pressing message. you will have to display time-sensitive notifications.

Step 1: For Android 8 and above you wish to have to set notification channel precedence as HIGH and under set notification of precedence.

val notificationChannel = NotificationChannel(
CHANNEL1,
"channel1",
NotificationManager.IMPORTANCE_HIGH
)

Step 2: The whole thing is identical with the exception of for something

simply setFullScreenIntent as an alternative of setContentIntent.

However if you wish to open full-screen intent. use this code for API 27 and above.

and for Api 26 and under

val flags = WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED or WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD or WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON or WindowManager.LayoutParams.FLAG_FULLSCREEN
window.addFlags(flags)

You are going to see a heads-up notification.

For those who lock the display. you are going to see your task opens

You can have observed this to your telephone.

Grouping notifications is quite common in new android telephones.

In case your app sends notifications. you’ll be able to crew them and upload a abstract notification to them.

you’ll be able to do that as follows:

Step 1: Create a Notification as all the time by way of including setGroup().setGroup will assist to affiliate identical notifications in a bunch that you wish to have to be grouped.

val newMessageNotification1 = NotificationCompat.Builder(context, NotificationChannels.CHANNEL1)
.setSmallIcon(R.drawable.e-mail)
.setContentTitle("Arun")
.setContentText("Ooo")
.setLargeIcon(icon)
.setGroup(GROUP_KEY_WORK_EMAIL)
.construct()

Step 2: you wish to have to create a abstract notification that may assist the person to get an concept concerning the kid notifications.

simply upload the similar crew string and setGroupSummary to true.

You wish to have so as to add InboxStyle to make stronger API 24 and under.

See, it is a abstract notification. for those who make bigger it you are going to see this.

From Android 8 and above android telephone now helps notifications badges.

Those dots seem by way of default in launcher apps that make stronger them and there’s not anything your app must do. Then again, there may well be scenarios wherein you don’t need the notification dot to look or you wish to have to keep watch over precisely which notifications seem there.

recently, you notice a badge.

Disabling a notification badge.

notificationChannel.setShowBadge(false)

Alter Notification Depend:

you’ll be able to trade the message rely by way of:

notification.setNumber(messageCount)

You’ll be able to create your customized format notifications however it isn’t really helpful as your app notification will range from different notifications.

However nonetheless to turn apply this:

Step 1: create your notification format

Step 2: Create an example of faraway view as appearing your notification format isn’t your app process.

use DecoratedCustomViewStyle() and setCustomContentView() together with your faraway view.

In spite of everything, we’ve come to the final section.

This can be a new function in Android 11.

The use of this selection you’ll be able to keep in touch with other people in a floating window.

Let’s see how we will increase this:

Step 1: First, you wish to have to create an example of Individual.

val individual = androidx.core.app.Individual.Builder()
.setName(simpleMessage.sender)
.setIcon(icon)
.setImportant(true)
.construct()

Step 2: Now, create an example of BubbleMetadata.

BubbleMetadata is used to encapsulate the tips had to show a notification as a bubble.

you’ll be able to configure quite a lot of homes for when the bubble is expanded.

right here as you’ll be able to see we want the pendingIntent and icon they are able to’t be null for BubbleMetadata.you’ll be able to set the peak of the floating window.

Step 3: Create an example of ShotcutInfoCompat.

ShotcutInfoCompat: this is helping you get entry to the options of ShortcutInfo.

A shortcut is mainly an motion that your app can carry out and those shortcuts will also be to be had within the telephone launcher.

Step 4: Now you wish to have to put up this shortcut by means of ShortcutManager.

Step 5: Now, create a notification builder and move bubbleMetadata and shortcut identity. you wish to have to care for backward compatibility as neatly

Step 6: name the process by way of passing information.

BubbleNotificationView(context).showNotification(
Message(
123,
"Arun",
"Hi",
R.drawable.ic_base_person
)
)

Step 7: You’ll want to upload those homes resizeable and embedded. On units working Android 10, notifications aren’t proven as bubbles except you explicitly set documentLaunchMode to "all the time"

Now, for those who run the app.

Now, we’ve come to the tip of the object.

You’ll be able to take a look at the code right here.

Thank You for studying.