{% setvar book_path %}/reference/kotlin/androidx/_book.yaml{% endsetvar %} {% include "_shared/_reference-head-tags.html" %}

ActivityLifecycleMonitorRegistry

class ActivityLifecycleMonitorRegistry

An exposed registry instance to make it easy for callers to find the lifecycle monitor for their application.

Summary

Public constructors
`ActivityLifecycleMonitorRegistry()`

Public functions
`java-static ActivityLifecycleMonitor!`	`getInstance()` Returns the ActivityLifecycleMonitor.
`java-static Unit`	`registerInstance(monitor: ActivityLifecycleMonitor!)` Stores a lifecycle monitor in the registry.

ActivityLifecycleMonitorRegistry()

java-static fun getInstance(): ActivityLifecycleMonitor!

Returns the ActivityLifecycleMonitor.

This monitor is not guaranteed to be present under all instrumentations.

Returns
`ActivityLifecycleMonitor!`	ActivityLifecycleMonitor the monitor for this application.

Throws
`java.lang.IllegalStateException: java.lang.IllegalStateException`	if no monitor has been registered.

java-static fun registerInstance(monitor: ActivityLifecycleMonitor!): Unit

Stores a lifecycle monitor in the registry.

This is a global registry - so be aware of the impact of calling this method!

Parameters
`monitor: ActivityLifecycleMonitor!`	the monitor for this application. Null deregisters any existing monitor.