Specifically, onPause()⁠ ⁠, onStop()⁠ ⁠, and onDestroy()⁠ ⁠ will be called to clean up the old UI, followed by onCreate()⁠ ⁠, onStart()⁠ ⁠, and onResume()⁠ ⁠ to rebuild it.Īt first glance, it may seem strange to tear down and rebuild the UI on every configuration change, however it is part of what makes it possible for Android apps to run well on so many devices and in any shape of window, while looking great with quality graphics and an optimized layout. In the Android lifecycle⁠ ⁠, when an app is resized or its orientation changes, in addition to other runtime configuration changes⁠ ⁠, the Activity’s UI is torn down and rebuilt. This brings additional considerations for Android apps that may have been designed for phones. Users can resize app windows by clicking and dragging the window borders. These windows can be resized or maximized, and will be resized accordingly when a tablet or convertible device is rotated. ChromeOS runs Android apps in individual windows.

Window management