For a recent example, Google announced at I/O that it had Android architectural components in beta. They were officially release last week, and can be accessed

For a recent example, Google announced at I/O that it had Android architectural components in beta. They were officially release last week, and can be accessed via AppCompatActivity, and to older Android versions via the support library. For example, the method call getLifecycle(), which is associated with these Android architectural components, is new.