CharSequence| Android Developers
ViewGroup.LayoutParams| Android Developers
Lets you express an application's compatibility with one or more versions of the Android platform, by means of an API level integer. The API level expressed by an application is compared to the API level of a given Android system, which can vary…| Android Developers
Application.ActivityLifecycleCallbacks| Android Developers
WindowManager.LayoutParams| Android Developers
The androidx namespace comprises the Android Jetpack libraries. Like the Support Library, libraries in the androidx namespace ship separately from the Android platform and provide backward compatibility across Android releases.| Android Developers