NotificationManager

public class NotificationManager 
extends Object 

java.lang.Object
↳	android.app.NotificationManager

---

Class to notify the user of events that happen. This is how you tell the user that something has happened in the background.

Notifications can take different forms:

• A persistent icon that goes in the status bar and is accessible through the launcher, (when the user selects it, a designated Intent can be launched),
• Turning on or flashing LEDs on the device, or
• Alerting the user by flashing the backlight, playing a sound, or vibrating.

Each of the notify methods takes an int id parameter and optionally a String tag parameter, which may be null. These parameters are used to form a pair (tag, id), or (null, id) if tag is unspecified. This pair identifies this notification from your app to the system, so that pair should be unique within your app. If you call one of the notify methods with a (tag, id) pair that is currently active and a new set of notification parameters, it will be updated. For example, if you pass a new status bar icon, the old icon in the status bar will be replaced with the new one. This is also the same tag and id you pass to the cancel(int) or cancel(String, int) method to clear this notification.

You do not instantiate this class directly; instead, retrieve it through getSystemService(Class).

Developer Guides

For a guide to creating notifications, read the Status Bar Notifications developer guide.

See also:

• Notification
• getSystemService(Class)

Summary

---

Nested classes
class	NotificationManager.Policy Notification policy configuration.

Constants
String	ACTION_INTERRUPTION_FILTER_CHANGED Intent that is broadcast when the state of getCurrentInterruptionFilter() changes.
String	ACTION_NOTIFICATION_POLICY_ACCESS_GRANTED_CHANGED Intent that is broadcast when the state of isNotificationPolicyAccessGranted() changes.
String	ACTION_NOTIFICATION_POLICY_CHANGED Intent that is broadcast when the state of getNotificationPolicy() changes.
int	IMPORTANCE_DEFAULT Default notification importance: shows everywhere, allowed to makes noise, but does not visually intrude.
int	IMPORTANCE_HIGH Higher notification importance: shows everywhere, allowed to makes noise and peek.
int	IMPORTANCE_LOW Low notification importance: shows everywhere, but is not intrusive.
int	IMPORTANCE_MAX Highest notification importance: shows everywhere, allowed to makes noise, peek, and use full screen intents.
int	IMPORTANCE_MIN Min notification importance: only shows in the shade, below the fold.
int	IMPORTANCE_NONE A notification with no importance: shows nowhere, is blocked.
int	IMPORTANCE_UNSPECIFIED Value signifying that the user has not expressed an importance.
int	INTERRUPTION_FILTER_ALARMS Interruption filter constant - Alarms only interruption filter - all notifications except those of category CATEGORY_ALARM are suppressed.
int	INTERRUPTION_FILTER_ALL Interruption filter constant - Normal interruption filter - no notifications are suppressed.
int	INTERRUPTION_FILTER_NONE Interruption filter constant - No interruptions filter - all notifications are suppressed and all audio streams (except those used for phone calls) and vibrations are muted.
int	INTERRUPTION_FILTER_PRIORITY Interruption filter constant - Priority interruption filter - all notifications are suppressed except those that match the priority criteria.
int	INTERRUPTION_FILTER_UNKNOWN Interruption filter constant - returned when the value is unavailable for any reason.

Public methods
String	addAutomaticZenRule(AutomaticZenRule automaticZenRule) Creates the given zen rule.
boolean	areNotificationsEnabled() Returns whether notifications from the calling package are blocked.
void	cancel(String tag, int id) Cancel a previously shown notification.
void	cancel(int id) Cancel a previously shown notification.
void	cancelAll() Cancel all previously shown notifications.
StatusBarNotification[]	getActiveNotifications() Recover a list of active notifications: ones that have been posted by the calling app that have not yet been dismissed by the user or cancel(String, int)ed by the app.
AutomaticZenRule	getAutomaticZenRule(String id) Returns the AutomaticZenRule with the given id, if it exists and the caller has access.
Map	getAutomaticZenRules() Returns AutomaticZenRules owned by the caller.
final int	getCurrentInterruptionFilter() Gets the current notification interruption filter.
int	getImportance() Returns the user specified importance for notifications from the calling package.
NotificationManager.Policy	getNotificationPolicy() Gets the current notification policy.
boolean	isNotificationPolicyAccessGranted() Checks the ability to read/modify notification policy for the calling package.
void	notify(String tag, int id, Notification notification) Post a notification to be shown in the status bar.
void	notify(int id, Notification notification) Post a notification to be shown in the status bar.
boolean	removeAutomaticZenRule(String id) Deletes the automatic zen rule with the given id.
final void	setInterruptionFilter(int interruptionFilter) Sets the current notification interruption filter.
void	setNotificationPolicy(NotificationManager.Policy policy) Sets the current notification policy.
boolean	updateAutomaticZenRule(String id, AutomaticZenRule automaticZenRule) Updates the given zen rule.

Inherited methods
From class java.lang.Object

Constants

---

ACTION_INTERRUPTION_FILTER_CHANGED

Added in  API level 23

String ACTION_INTERRUPTION_FILTER_CHANGED

Intent that is broadcast when the state of getCurrentInterruptionFilter() changes. This broadcast is only sent to registered receivers.

Constant Value: "android.app.action.INTERRUPTION_FILTER_CHANGED"

ACTION_NOTIFICATION_POLICY_ACCESS_GRANTED_CHANGED

Added in  API level 23

String ACTION_NOTIFICATION_POLICY_ACCESS_GRANTED_CHANGED

Intent that is broadcast when the state of isNotificationPolicyAccessGranted() changes. This broadcast is only sent to registered receivers, and only to the apps that have changed.

Constant Value: "android.app.action.NOTIFICATION_POLICY_ACCESS_GRANTED_CHANGED"

ACTION_NOTIFICATION_POLICY_CHANGED

Added in  API level 23

String ACTION_NOTIFICATION_POLICY_CHANGED

Intent that is broadcast when the state of getNotificationPolicy() changes. This broadcast is only sent to registered receivers.

Constant Value: "android.app.action.NOTIFICATION_POLICY_CHANGED"

IMPORTANCE_DEFAULT

Added in  API level 24

int IMPORTANCE_DEFAULT

Default notification importance: shows everywhere, allowed to makes noise, but does not visually intrude.

Constant Value: 3 (0x00000003)

IMPORTANCE_HIGH

Added in  API level 24

int IMPORTANCE_HIGH

Higher notification importance: shows everywhere, allowed to makes noise and peek.

Constant Value: 4 (0x00000004)

IMPORTANCE_LOW

Added in  API level 24

int IMPORTANCE_LOW

Low notification importance: shows everywhere, but is not intrusive.

Constant Value: 2 (0x00000002)

IMPORTANCE_MAX

Added in  API level 24

int IMPORTANCE_MAX

Highest notification importance: shows everywhere, allowed to makes noise, peek, and use full screen intents.

Constant Value: 5 (0x00000005)

IMPORTANCE_MIN

Added in  API level 24

int IMPORTANCE_MIN

Min notification importance: only shows in the shade, below the fold.

Constant Value: 1 (0x00000001)

IMPORTANCE_NONE

Added in  API level 24

int IMPORTANCE_NONE

A notification with no importance: shows nowhere, is blocked.

Constant Value: 0 (0x00000000)

IMPORTANCE_UNSPECIFIED

Added in  API level 24

int IMPORTANCE_UNSPECIFIED

Value signifying that the user has not expressed an importance. This value is for persisting preferences, and should never be associated with an actual notification.

Constant Value: -1000 (0xfffffc18)

INTERRUPTION_FILTER_ALARMS

Added in  API level 23

int INTERRUPTION_FILTER_ALARMS

Interruption filter constant - Alarms only interruption filter - all notifications except those of category CATEGORY_ALARM are suppressed. Some audio streams are muted.

Constant Value: 4 (0x00000004)

INTERRUPTION_FILTER_ALL

Added in  API level 23

int INTERRUPTION_FILTER_ALL

Interruption filter constant - Normal interruption filter - no notifications are suppressed.

Constant Value: 1 (0x00000001)

INTERRUPTION_FILTER_NONE

Added in  API level 23

int INTERRUPTION_FILTER_NONE

Interruption filter constant - No interruptions filter - all notifications are suppressed and all audio streams (except those used for phone calls) and vibrations are muted.

Constant Value: 3 (0x00000003)

INTERRUPTION_FILTER_PRIORITY

Added in  API level 23

int INTERRUPTION_FILTER_PRIORITY

Interruption filter constant - Priority interruption filter - all notifications are suppressed except those that match the priority criteria. Some audio streams are muted. See priorityCallSenders, priorityCategories, priorityMessageSenders to define or query this criteria. Users can additionally specify packages that can bypass this interruption filter.

Constant Value: 2 (0x00000002)

INTERRUPTION_FILTER_UNKNOWN

Added in  API level 23

int INTERRUPTION_FILTER_UNKNOWN

Interruption filter constant - returned when the value is unavailable for any reason.

Constant Value: 0 (0x00000000)

Public methods

---

addAutomaticZenRule

Added in  API level 24

String addAutomaticZenRule (AutomaticZenRule automaticZenRule)

Creates the given zen rule.

Throws a SecurityException if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Parameters
automaticZenRule	AutomaticZenRule: the rule to create.

Returns
String	The id of the newly created rule; null if the rule could not be created.

areNotificationsEnabled

Added in  API level 24

boolean areNotificationsEnabled ()

Returns whether notifications from the calling package are blocked.

Returns
boolean

cancel

Added in  API level 5

void cancel (String tag,                 int id)

Cancel a previously shown notification. If it's transient, the view will be hidden. If it's persistent, it will be removed from the status bar.

Parameters
tag	String
id	int

cancel

Added in  API level 1

void cancel (int id)

Cancel a previously shown notification. If it's transient, the view will be hidden. If it's persistent, it will be removed from the status bar.

Parameters
id	int

cancelAll

Added in  API level 1

void cancelAll ()

Cancel all previously shown notifications. See cancel(int) for the detailed behavior.

getActiveNotifications

Added in  API level 23

StatusBarNotification[] getActiveNotifications ()

Recover a list of active notifications: ones that have been posted by the calling app that have not yet been dismissed by the user or cancel(String, int)ed by the app. Each notification is embedded in a StatusBarNotification object, including the original tag and id supplied to notify() (via getTag()and getId()) as well as a copy of the original Notification object (via getNotification()).

Returns
StatusBarNotification[]	An array of StatusBarNotification.

getAutomaticZenRule

Added in  API level 24

AutomaticZenRule getAutomaticZenRule (String id)

Returns the AutomaticZenRule with the given id, if it exists and the caller has access.

Throws a SecurityException if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Returns null if there are no zen rules that match the given id, or if the calling package doesn't own the matching rule. See getOwner().

Parameters
id	String

Returns
AutomaticZenRule

getAutomaticZenRules

Added in  API level 24

Map getAutomaticZenRules ()

Returns AutomaticZenRules owned by the caller.

Throws a SecurityException if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Returns
Map

getCurrentInterruptionFilter

Added in  API level 23

int getCurrentInterruptionFilter ()

Gets the current notification interruption filter.

The interruption filter defines which notifications are allowed to interrupt the user (e.g. via sound & vibration) and is applied globally.

Returns
int	One of the INTERRUPTION_FILTER_ constants, or INTERRUPTION_FILTER_UNKNOWN when unavailable.

getImportance

Added in  API level 24

int getImportance ()

Returns the user specified importance for notifications from the calling package.

Returns
int	An importance level, such as IMPORTANCE_DEFAULT.

getNotificationPolicy

Added in  API level 23

NotificationManager.Policy getNotificationPolicy ()

Gets the current notification policy.

Only available if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Returns
NotificationManager.Policy

isNotificationPolicyAccessGranted

Added in  API level 23

boolean isNotificationPolicyAccessGranted ()

Checks the ability to read/modify notification policy for the calling package.

Returns true if the calling package can read/modify notification policy.

Request policy access by sending the user to the activity that matches the system intent action ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS.

Use ACTION_NOTIFICATION_POLICY_ACCESS_GRANTED_CHANGED to listen for user grant or denial of this access.

Returns
boolean

notify

Added in  API level 5

void notify (String tag,                 int id,                 Notification notification)

Post a notification to be shown in the status bar. If a notification with the same tag and id has already been posted by your application and has not yet been canceled, it will be replaced by the updated information.

Parameters
tag	String: A string identifier for this notification. May be null.
id	int: An identifier for this notification. The pair (tag, id) must be unique within your application.
notification	Notification: A Notification object describing what to show the user. Must not be null.

notify

Added in  API level 1

void notify (int id,                 Notification notification)

Post a notification to be shown in the status bar. If a notification with the same id has already been posted by your application and has not yet been canceled, it will be replaced by the updated information.

Parameters
id	int: An identifier for this notification unique within your application.
notification	Notification: A Notification object describing what to show the user. Must not be null.

removeAutomaticZenRule

Added in  API level 24

boolean removeAutomaticZenRule (String id)

Deletes the automatic zen rule with the given id.

Throws a SecurityException if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Callers can only delete rules that they own. See getOwner().

Parameters
id	String: the id of the rule to delete.

Returns
boolean	Whether the rule was successfully deleted.

setInterruptionFilter

Added in  API level 23

void setInterruptionFilter (int interruptionFilter)

Sets the current notification interruption filter.

The interruption filter defines which notifications are allowed to interrupt the user (e.g. via sound & vibration) and is applied globally.

Parameters
interruptionFilter	int

Returns
void	One of the INTERRUPTION_FILTER_ constants, or INTERRUPTION_FILTER_UNKNOWN when unavailable. Only available if policy access is granted to this package. See isNotificationPolicyAccessGranted().

setNotificationPolicy

Added in  API level 23

void setNotificationPolicy (NotificationManager.Policy policy)

Sets the current notification policy.

Only available if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Parameters
policy	NotificationManager.Policy: The new desired policy.

updateAutomaticZenRule

Added in  API level 24

boolean updateAutomaticZenRule (String id,                 AutomaticZenRule automaticZenRule)

Updates the given zen rule.

Throws a SecurityException if policy access is granted to this package. See isNotificationPolicyAccessGranted().

Callers can only update rules that they own. See getOwner().

Parameters
id	String: The id of the rule to update
automaticZenRule	AutomaticZenRule: the rule to update.

Returns
boolean	Whether the rule was successfully updated.

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