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

ActivityLifecycleMonitorRegistry

public final class ActivityLifecycleMonitorRegistry

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

Summary

Public methods
`static @NonNull ActivityLifecycleMonitor`	`getInstance()` Returns the ActivityLifecycleMonitor.
`static @NonNull void`	`registerInstance(@NonNull ActivityLifecycleMonitor monitor)` Stores a lifecycle monitor in the registry.

@NonNull
public static ActivityLifecycleMonitor getInstance()

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`	if no monitor has been registered.

@NonNull
public static void registerInstance(@NonNull ActivityLifecycleMonitor monitor)

Stores a lifecycle monitor in the registry.

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

Parameters
`@NonNull ActivityLifecycleMonitor monitor`	the monitor for this application. Null deregisters any existing monitor.