# User Switching Multiple users and the ability to switch between them is controlled by Settings -> System -> Multiple Users. ## Entry Points ### Quick Settings In the QS footer, an icon becomes available for users to tap on. The view and its onClick actions are handled by [MultiUserSwitchController][2]. Multiple visual implementations are currently in use; one for phones/foldables ([UserSwitchDialogController][6]) and one for tablets ([UserSwitcherFullscreenDialog][5]). ### Bouncer May allow changing or adding new users directly from they bouncer. See [KeyguardBouncer][1] ### Keyguard affordance [KeyguardQsUserSwitchController][4] ## Components All visual implementations should derive their logic and use the adapter specified in: ### [UserSwitcherController][3] * Contains the current list of all system users * Listens for relevant events and broadcasts to make sure this list stays up to date * Manages user switching and dialogs for exiting from guest users * Is settings aware regarding adding users from the lockscreen ## Visual Components ### [UserSwitcherFullscreenDialog][5] A fullscreen user switching activity, supporting add guest/user actions if configured. ### [UserSwitchDialogController][6] Renders user switching as a dialog over the current surface, and supports add guest user/actions if configured. [1]: /frameworks/base/packages/SystemUI/docs/device-entry/bouncer.md [2]: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserController.java [3]: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.java [4]: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardQsUserSwitchController.java [5]: /frameworks/base/packages/SystemUI/src/com/android/systemui/user/UserSwitcherFullscreenDialog.kt [6]: /frameworks/base/packages/SystemUI/src/com/android/systemui/qs/user/UserSwitchDialogController.kt