This chapter has introduced the basics of lifecycle awareness and the classes and interfaces of the Android Lifecycle package included with Android Jetpack. The package contains a number of classes and interfaces that are used to create lifecycle owners, lifecycle observers and lifecycle-aware components. A lifecycle owner has assigned to it a Lifecycle object that maintains a record of the owners state and a list of subscribed observers. When the owner’s state changes, the observer is notified via lifecycle event methods so that it can respond to the change.
The next chapter will create an Android Studio project that demonstrates how to work with and create lifecycle-aware components including the creation of both lifecycle observers and owners, and the handling of lifecycle state changes and events.
