Android Fundamentals: Notifications

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Questions and Answers

Where can users view notifications at any time?

Notification channel
App icon
Android settings
Notification drawer (correct)

What is displayed on the app icon on devices running Android 8.0 and higher?

App icon badge
Notification channel
Notification drawer
Colored badge (also known as a notification dot) (correct)

What can be customized in notification channels?

Notification sound, light, vibrate, and so on (correct)
App icon
Notification type
Notification drawer

What is the purpose of notification channels?

To create a user-customizable channel for each type of notification (A) Signup and view all the answers

What is mandatory for notifications starting from Android 8.0 (API level 26)?

Notification channels (B) Signup and view all the answers

What happens if notifications are not assigned to a channel in Android 8.0 (API level 26)?

Notifications will not be displayed (B) Signup and view all the answers

What is the minimum API level for notification channels?

API level 26 (B) Signup and view all the answers

Do apps targeting lower than Android 8.0 (API level 26) need to implement notification channels?

No, it is not required (B) Signup and view all the answers

What is the purpose of a NotificationChannel constructor?

To create a Notification channel instance (A) Signup and view all the answers

In Android 8.0 and higher, what determines the intrusion level for all notifications in a channel?

The notification importance level (D) Signup and view all the answers

What is the range of importance levels for notifications in Android 8.0 and higher?

0 to 4 (C) Signup and view all the answers

What is required to create a NotificationChannel instance?

Both an ID unique within the package and a user visible name (D) Signup and view all the answers

What is the purpose of notification channels in the device Settings?

To categorize notifications under App notifications (D) Signup and view all the answers

What is the alternative to setting the importance level for notifications in earlier versions of Android?

Setting the notification priority (A) Signup and view all the answers

What is the minimum API level required to use notification channels?

API level 26 (A) Signup and view all the answers

What is the purpose of the NotificationChannel constructor in Android?

To create a Notification channel instance (D) Signup and view all the answers

What is the primary purpose of a notification?

To show a message to the user outside the regular app UI (B) Signup and view all the answers

Where do notifications typically appear?

In the status bar (D) Signup and view all the answers

What is a notification channel?

A customizable way to categorize notifications (B) Signup and view all the answers

What happens when a user opens the notification drawer?

The notification details are displayed (B) Signup and view all the answers

What is the purpose of a notification drawer?

To view the notification details (C) Signup and view all the answers

What are the components of a notification?

Icon, title, and detail text (C) Signup and view all the answers

How do users typically interact with notifications?

By tapping on them (D) Signup and view all the answers

What is the term for the number displayed on the app icon?

App icon badge (D) Signup and view all the answers

Study Notes

Notifications

Users can view notifications at any time in the notification drawer.
Android 8.0 (API level 26) and higher devices display new notifications as a colored "badge" or "notification dot" on the app icon.
Users can long-press on an app icon to see notifications for that app.

Notification Channels

Introduced in Android 8.0 (API level 26), notification channels allow users to customize notifications.
A notification channel is a user-customizable channel for each type of notification.
Multiple notifications can be grouped into a channel.
Channels allow setting notification behavior, such as sound, light, and vibration, for all notifications in that channel.

Mandatory Notification Channels

In Android 8.0 (API level 26) and higher, all notifications must be assigned to a channel; otherwise, notifications will not be displayed.
Apps targeting lower than Android 8.0 (API level 26) do not need to implement notification channels.

Notification Channels in Settings

Notification channels appear as categories under App notifications in the device Settings.

Creating a Notification Channel

Create a notification channel using the NotificationChannel constructor.
Specify a unique ID, user-visible name, and importance level for the channel.

Importance Level

Available in Android 8.0 (API level 26) and higher, sets the intrusion level (sound and visibility) for all notifications posted in the channel.
Ranges from IMPORTANCE_NONE (0) to IMPORTANCE_HIGH (4).
For earlier versions of Android (lower than API level 26), set the priority.

What Are Notifications?

A notification is a message displayed to the user outside the regular app UI.
A notification typically includes a small icon, title, and detail text.

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Description

Learn about notifications in Android, including app icon badges and notification dots, available on devices running Android 8.0 and higher.