1*d57664e9SAndroid Build Coastguard Worker# User Switching 2*d57664e9SAndroid Build Coastguard Worker 3*d57664e9SAndroid Build Coastguard WorkerMultiple users and the ability to switch between them is controlled by Settings -> System -> Multiple Users. 4*d57664e9SAndroid Build Coastguard Worker 5*d57664e9SAndroid Build Coastguard Worker## Entry Points 6*d57664e9SAndroid Build Coastguard Worker 7*d57664e9SAndroid Build Coastguard Worker### Quick Settings 8*d57664e9SAndroid Build Coastguard Worker 9*d57664e9SAndroid Build Coastguard WorkerIn 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]). 10*d57664e9SAndroid Build Coastguard Worker 11*d57664e9SAndroid Build Coastguard Worker### Bouncer 12*d57664e9SAndroid Build Coastguard Worker 13*d57664e9SAndroid Build Coastguard WorkerMay allow changing or adding new users directly from they bouncer. See [KeyguardBouncer][1] 14*d57664e9SAndroid Build Coastguard Worker 15*d57664e9SAndroid Build Coastguard Worker### Keyguard affordance 16*d57664e9SAndroid Build Coastguard Worker 17*d57664e9SAndroid Build Coastguard Worker[KeyguardQsUserSwitchController][4] 18*d57664e9SAndroid Build Coastguard Worker 19*d57664e9SAndroid Build Coastguard Worker## Components 20*d57664e9SAndroid Build Coastguard Worker 21*d57664e9SAndroid Build Coastguard WorkerAll visual implementations should derive their logic and use the adapter specified in: 22*d57664e9SAndroid Build Coastguard Worker 23*d57664e9SAndroid Build Coastguard Worker### [UserSwitcherController][3] 24*d57664e9SAndroid Build Coastguard Worker 25*d57664e9SAndroid Build Coastguard Worker* Contains the current list of all system users 26*d57664e9SAndroid Build Coastguard Worker* Listens for relevant events and broadcasts to make sure this list stays up to date 27*d57664e9SAndroid Build Coastguard Worker* Manages user switching and dialogs for exiting from guest users 28*d57664e9SAndroid Build Coastguard Worker* Is settings aware regarding adding users from the lockscreen 29*d57664e9SAndroid Build Coastguard Worker 30*d57664e9SAndroid Build Coastguard Worker## Visual Components 31*d57664e9SAndroid Build Coastguard Worker 32*d57664e9SAndroid Build Coastguard Worker### [UserSwitcherFullscreenDialog][5] 33*d57664e9SAndroid Build Coastguard Worker 34*d57664e9SAndroid Build Coastguard WorkerA fullscreen user switching activity, supporting add guest/user actions if configured. 35*d57664e9SAndroid Build Coastguard Worker 36*d57664e9SAndroid Build Coastguard Worker### [UserSwitchDialogController][6] 37*d57664e9SAndroid Build Coastguard Worker 38*d57664e9SAndroid Build Coastguard WorkerRenders user switching as a dialog over the current surface, and supports add guest user/actions if configured. 39*d57664e9SAndroid Build Coastguard Worker 40*d57664e9SAndroid Build Coastguard Worker[1]: /frameworks/base/packages/SystemUI/docs/device-entry/bouncer.md 41*d57664e9SAndroid Build Coastguard Worker[2]: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserController.java 42*d57664e9SAndroid Build Coastguard Worker[3]: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.java 43*d57664e9SAndroid Build Coastguard Worker[4]: /frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardQsUserSwitchController.java 44*d57664e9SAndroid Build Coastguard Worker[5]: /frameworks/base/packages/SystemUI/src/com/android/systemui/user/UserSwitcherFullscreenDialog.kt 45*d57664e9SAndroid Build Coastguard Worker[6]: /frameworks/base/packages/SystemUI/src/com/android/systemui/qs/user/UserSwitchDialogController.kt 46