Is The Canary Camera Notification Sound Available Through Other Apps

A notification is a message that Android displays outside your app's UI to provide the user with reminders, communication from other people, or other timely information from your app. Users tin tap the notification to open your app or have an action directly from the notification.

This folio provides an overview of where notifications appear and the available features. If you lot want to start edifice your notifications, instead read Create a Notification.

For more information almost the design and interaction patterns, meet the Notifications design guide. Additionally, come across the Android Notifications Sample for a demonstration of best practices in using the Notification.Fashion API in both mobile and wearable apps.

Appearances on a device

Notifications appear to users in different locations and formats, such every bit an icon in the status bar, a more than detailed entry in the notification drawer, as a badge on the app'due south icon, and on paired wearables automatically.

Status bar and notification drawer

When y'all outcome a notification, it offset appears as an icon in the status bar.

Figure ane. Notification icons appear on the left side of the status bar

Users tin swipe down on the status bar to open the notification drawer, where they can view more than details and take actions with the notification.

Figure 2. Notifications in the notification drawer

Users tin can drag down on a notification in the drawer to reveal the expanded view, which shows additional content and action buttons, if provided.

A notification remains visible in the notification drawer until dismissed past the app or the user.

Heads-upward notification

First with Android 5.0, notifications tin briefly appear in a floating window chosen a heads-up notification. This behavior is usually for of import notifications that the user should know well-nigh immediately, and it appears only if the device is unlocked.

Effigy 3. A heads-up notification appears in forepart of the foreground app

The heads-up notification appears the moment your app bug the notification and it disappears subsequently a moment, but remains visible in the notification drawer as usual.

Example conditions that might trigger heads-up notifications include the post-obit:

The user's action is in fullscreen mode (the app uses fullScreenIntent).
The notification has high priority and uses ringtones or vibrations on devices running Android 7.1 (API level 25) and lower.
The notification channel has high importance on devices running Android 8.0 (API level 26) and higher.

Lock screen

Beginning with Android five.0, notifications tin can appear on the lock screen.

You lot tin programmatically set up the level of detail visible in notifications posted by your app on a secure lock screen, or even whether the notification volition show on the lock screen at all.

Users can use the arrangement settings to choose the level of detail visible in lock screen notifications, including the option to disable all lock screen notifications. Starting with Android 8.0, users tin can cull to disable or enable lock screen notifications for each notification channel.

Figure four. Notifications on the lock screen with sensitive content subconscious

To learn more than, come across how to Set lock screen visibility.

App icon badge

In supported launchers on devices running Android 8.0 (API level 26) and higher, app icons indicate new notifications with a colored "badge" (also known every bit a "notification dot") on the respective app launcher icon.

Users can long-printing on an app icon to see the notifications for that app. Users tin can then dismiss or act on notifications from that menu, similar to the notification drawer.

Figure 5. Notification badges and the long-printing menu

To acquire more about how badges work, read Notification badges.

Clothing OS devices

If the user has a paired Vesture Os device, all your notifications appear at that place automatically, including expandable detail and action buttons.

You lot can too enhance the experience by customizing some appearances for the notification on wearables and provide dissimilar deportment, including suggested replies and voice input replies. For more data, see how to add clothing-specific features to your notification.

Figure 6. Notifications automatically appear on a paired Wear Bone device

Notification anatomy

The blueprint of a notification is determined by system templates—your app just defines the contents for each portion of the template. Some details of the notification announced merely in the expanded view.

Effigy vii. A notification with bones details

The nearly common parts of a notification are indicated in figure 7 equally follows:

Small icon: This is required and set with setSmallIcon().
App proper name: This is provided by the organization.
Time postage: This is provided by the system just yous tin can override with setWhen() or hide information technology with setShowWhen(simulated).
Large icon: This is optional (usually used only for contact photos; do not use it for your app icon) and prepare with setLargeIcon().
Title: This is optional and set with setContentTitle().
Text: This is optional and set with setContentText().

We strongly recommend using system templates to ensure proper design compatibility on all devices. If necessary, notwithstanding, you lot can create a custom notification layout.

For more than information about how to create a notification with these features and more than, read Create a Notification.

Notification actions

Although it'due south not required, every notification should open an appropriate app activity when tapped. In improver to this default notification activity, you can add action buttons that complete an app-related job from the notification (often without opening an activeness), as shown in figure 9.

Figure 9. A notification with action buttons

Starting in Android 7.0 (API level 24), you tin can also add an activeness to reply to messages or enter other text direct from the notification.

Starting in Android 10 (API level 29), the platform can automatically generate action buttons with suggested intent-based actions.

Adding activeness buttons is explained further in Create a Notification.

Require an unlocked device

Users might see notification actions on the device's lock screen. If a given notification action causes an app to launch an action or transport a straight answer, users must unlock the device before the app tin can invoke that notification action.

On Android 12 (API level 31) and higher, you can configure a notification action such that the device must exist unlocked in gild for your app to invoke that action, no thing what workflow the action launches. This choice helps add an extra layer of security to notifications on locked devices.

To crave a device to be unlocked earlier your app invokes a given notification action, pass true into setAuthenticationRequired() when creating your notification activity, as shown in the following code snippet:

Kotlin

val moreSecureNotification = Notification.Builder(         context, NotificationListenerVerifierActivity.TAG)     .addAction(...)              // This notification e'er requests authentication when invoked     // from a lock screen.     .setAuthenticationRequired(truthful)              .build()

Java

Notification moreSecureNotification = new Notification.Architect(         context, NotificationListenerVerifierActivity.TAG)     .addAction(...)              // This notification always requests authentication when invoked     // from a lock screen.     .setAuthenticationRequired(true)              .build();

Expandable notification

By default, the notification's text content is truncated to fit on 1 line. If you want your notification to be longer, you can enable a larger text expanse that'southward expandable past applying an additional template, as shown in figure 8.

Figure 8. An expandable notification for large text

You can also create an expandable notification with an paradigm, in inbox style, a conversation conversation, or media playback controls. For more information, read Create an Expandable Notification.

Notification updates and groups

To avert bombarding your users with multiple or redundant notifications when yous have additional updates, yous should consider updating an existing notification rather than issuing a new i, or consider using the inbox-style notification to show conversation updates.

However, if it'southward necessary to deliver multiple notifications, you should consider grouping those divide notifications into a grouping (bachelor on Android 7.0 and higher). A notification group allows you to collapse multiple notifications into only 1 postal service in the notification drawer, with a summary. The user can then expand the notification to reveal the details for each individual notification.

The user can progressively expand the notification group and each notification within information technology for more details.

Figure 10. A collapsed and expanded notification group

To acquire how to add notifications to a group, run into Create a Group of Notifications.

Notification channels

Starting in Android 8.0 (API level 26), all notifications must be assigned to a channel or information technology volition not appear. By categorizing notifications into channels, users tin disable specific notification channels for your app (instead of disabling all your notifications), and users can control the visual and auditory options for each channel—all from the Android system settings (effigy 11). Users can also long-press a notification to change behaviors for the associated channel.

On devices running Android vii.1 (API level 25) and lower, users tin can manage notifications on a per-app basis only (effectively each app only has ane channel on Android vii.ane and lower).

Effigy 11. Notification settings for Clock app and one of its channels

One app can have multiple notification channels—a carve up channel for each type of notification the app bug. An app can as well create notification channels in response to choices fabricated past users of your app. For example, you may set up separate notification channels for each conversation group created past a user in a messaging app.

The aqueduct is also where you specify the importance level for your notifications on Android viii.0 and higher. So all notifications posted to the aforementioned notification channel take the same behavior.

For more information, run across Create and Manage Notification Channels.

Notification importance

Android uses the importance of a notification to determine how much the notification should interrupt the user (visually and audibly). The college the importance of a notification, the more than interruptive the notification will be.

On Android 8.0 (API level 26) and above, importance of a notification is determined by the importance of the channel the notification was posted to. Users tin change the importance of a notification channel in the organization settings (figure 12). On Android seven.1 (API level 25) and below, importance of each notification is determined by the notification'southward priority.

Figure 12. Users tin change the importance of each channel on Android 8.0 and higher

The possible importance levels are the post-obit:

Urgent: Makes a sound and appears as a heads-upwardly notification.
High: Makes a sound.
Medium: No sound.
Low: No sound and does non announced in the status bar.

All notifications, regardless of importance, appear in not-interruptive organisation UI locations, such as in the notification drawer and equally a bluecoat on the launcher icon (though you tin modify the advent of the notification badge).

For more data, see how to set up the importance.

Do Not Disturb mode

Starting in Android 5.0 (API level 21), users can enable Do Non Disturb way, which silences sounds and vibration for all notifications. Notifications still appear in the system UI as normal, unless the user specifies otherwise.

In that location are three dissimilar levels available in Do Not Disturb mode:

Total silence: blocks all sounds and vibrations, including from alarms, music, videos, and games.
Alarms simply: blocks all sounds and vibrations, except from alarms.
Priority only: users can configure which system-wide categories can interrupt them (such equally merely alarms, reminders, events, calls, or letters). For letters and calls, users can besides choose to filter based on who the sender or caller is (effigy thirteen).

Figure 13. Users can can let notifications through based on arrangement-wide categories (left) and based on who sent a bulletin or who is calling (right).

On Android 8.0 (API level 26) and above, users can additionally allow notifications through for app-specific categories (too known equally channels) by overriding Exercise Not Disturb on a channel-by-channel basis. For example, a payment app might take channels for notifications related to withdrawals and deposits. The user can then choose to allow either withdrawal notifications, eolith notifications, or both when in priority way. On devices running Android 7.1 (API level 25) and beneath, users can allow notifications through on an app by app basis, rather than on a channel by channel footing.

To properly configure your notifications for these user settings, you must set a arrangement-wide category and channel.

Notifications for foreground services

A notification is required when your app is running a "foreground service"—a Service running in the background that's long living and noticeable to the user, such equally a media player. This notification cannot be dismissed like other notifications. To remove the notification, the service must be either stopped or removed from the "foreground" land.

For more information read Running a service in the foreground. And if you lot are building a media player, also read Using MediaStyle notifications with a foreground service.

Posting limits

First with Android 8.ane (API level 27), apps cannot make a notification sound more than once per second. If your app posts multiple notifications in 1 second, they all appear equally expected, but only the first notification per 2nd makes a sound.

However, Android also applies a rate limit when updating a notification. If you post updates to a single notification too frequently (many in less than one 2nd), the system might drop some updates.

Notification compatibility

Since Android one.0, the notification organisation UI and the notification-related APIs have continually evolved. To use the latest notification API features while nonetheless supporting older devices, employ the support library notification API: NotificationCompat and its subclasses, as well as NotificationManagerCompat. This will allow y'all to avoid writing provisional code to check API levels because these APIs handle that for you.

NotificationCompat is updated equally the platform evolves to include the latest methods. Information technology is important to note that the availability of a method in NotificationCompat does non guarantee that the corresponding feature will be provided on older devices. In some cases calling a newly-introduced API results in a no-op on older devices. For example, NotificationCompat.addAction() displays the action button on a device running Android 4.1 (API level 16) and higher only.

The following is a summary of the nearly notable beliefs changes for Android notifications.

Android 4.1, API level 16

Introduced expandable notification templates (called notification styles), allowing for larger notification content area to display data. Users tin can employ a i finger swipe up/down gesture to expand a notification.
Also introduced the ability to add together additional actions, in the form of buttons, to a notification.
Added ability for users to turn notifications off on a per-app basis in settings.

Android four.4, API level 19 and twenty

Notification listener services were added to the API.
Android Article of clothing (now called Wear Os) support was added in API level xx.

Android v.0, API level 21

Introduced lock screen and heads-up notifications.
The user can now put the phone into Do Not Disturb mode and configure which notifications are allowed to interrupt them when the device is in priority only fashion.
Methods added to API set whether or not a notification is displayed on the lock screen (setVisibility()) and for specifying "public" version of the notification text.
setPriority() method added which tells the system how "interruptive" this notification should be (due east.g. setting information technology to loftier makes the notification appear every bit a heads-up notification).
Notification stacks support added to Android Vesture (now chosen Wear Os) devices. Put notifications into a stack using setGroup(). Note that notification stacks were not supported on tablets nor phones nonetheless. Notification stacks would after become known every bit a grouping or bundle.

Android 7.0, API level 24

Notification templates were restyled to put emphasis on the hero image and avatar.
3 notification templates were added: i for messaging apps and the other ii for decorating custom content views with the expandable affordance and other system decorations.
Support added to handheld devices (phones and tablets) for notification groups. Uses the same API as Android Wear (at present called Wear OS) notification stacks introduced in Android 5.0 (API level 21).
Users tin reply directly inside of a notification (they can enter text which will then be routed to the notification'due south parent app) using inline reply.

Android 8.0, API level 26

Individual notifications must now be put in a specific aqueduct.
Users can now turn off notifications per channel, instead of turning off all notifications from an app.
Apps with agile notifications display a notification "bluecoat" on top of their app icon on the home/launcher screen.
Users can now snooze a notification from the drawer. Yous can set an automatic timeout for a notification.
You can too set the notification's background color.
Some APIs regarding notification behaviors were moved from Notification to NotificationChannel. For case, use NotificationChannel.setImportance() instead of NotificationCompat.Builder.setPriority() for Android 8.0 and higher.

Source: https://developer.android.com/guide/topics/ui/notifiers/notifications

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