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简介

用户界面：System =》Multiple Users =》 开关多用户模式。

一般是不同用户模式下，有修改Settings应用配置的权限差异，因此需要通过用户类型对功能进行判断限制。

代码

通过UserManager可以获取当前用户的信息。

frameworks/base/core/java/android/os/UserManager.java

提供多种判断当前用户类型的接口

UserManager功能接口

API	Comment
getUserType()	获取当前用户类型 @return the user type of the context user.
getUserName()	获取当前用户名 Returns the user name of the context user. This call is only available to applications on the system image.
isSystemUser()	判断是否为系统用户 Used to check if the context user is the system user. The system user is the initial user that is implicitly created on first boot and hosts most of the system services.
isGuestUser()	基于上下文，判断是否为访客用户 Used to check if the context user is a guest user. A guest user may be transient. @return whether the context user is a guest user.
isGuestUser(@UserIdInt int userId)	判断指定ID是否为访客用户 Checks if a user is a guest user. @return whether user is a guest user.
isUserAdmin(@UserIdInt int userId)	判断指定指定id的用户是否为admin（admin可以不唯一） 返回user.isAdmin() @hide Returns whether the provided user is an admin user. There can be more than one admin user.

源码

/*** Manages users and user details on a multi-user system. There are two major categories of* users: fully customizable users with their own login, and profiles that share a workspace* with a related user.* <p>* Users are different from accounts, which are managed by* {@link AccountManager}. Each user can have their own set of accounts.* <p>* See {@link DevicePolicyManager#ACTION_PROVISION_MANAGED_PROFILE} for more on managed profiles.*/
@SystemService(Context.USER_SERVICE)
@android.ravenwood.annotation.RavenwoodKeepPartialClass
public class UserManager {/*** @return the user type of the context user.* @hide*/@TestApi@RequiresPermission(anyOf = {android.Manifest.permission.MANAGE_USERS,android.Manifest.permission.CREATE_USERS,android.Manifest.permission.QUERY_USERS})@UserHandleAwarepublic @NonNull String getUserType() {UserInfo userInfo = getUserInfo(mUserId);return userInfo == null ? "" : userInfo.userType;}

获取用户信息的方法

代码案例：

通过系统服务获取UserManager对象，然后根据需求get信息。

   //判断是否为Owner机主  private static boolean isAdminUser(Context context) {if (context == null) return false;final UserManager userManager = context.getSystemService(UserManager.class);if (userManager == null) return false;//获取当前用户类型 Log.d(TAG, "isAdminUser: Now user is " + userManager.getUserType());return userManager.isAdminUser();}

常见用户类型

常见类型是Owner，User和Guest。

多用户模式用户类型映射关系

String	USER_TYPE	用户	场景说明
USER_TYPE_FULL_SYSTEM	android.os.usertype.full.SYSTEM	Owner，即机主，adminUser。	User type representing a {@link UserHandle#USER_SYSTEM system} user that is a human user.  This type of user cannot be created; it can only pre-exist on first boot.
USER_TYPE_FULL_SECONDARY	android.os.usertype.full.SECONDARY	User，非Owner（机主）用户。	User type representing a regular non-profile non-{@link UserHandle#USER_SYSTEM system} human user. This is sometimes called an ordinary 'secondary user'.
USER_TYPE_FULL_GUEST	android.os.usertype.full.GUEST	Guset，访客模式	User type representing a guest user that may be transient.
USER_TYPE_FULL_DEMO	android.os.usertype.full.DEMO	怎么变成demo？	User type representing a user for demo purposes only, which can be removed at any time.
USER_TYPE_FULL_RESTRICTED	android.os.usertype.full.RESTRICTED	受限用户，profile是什么？	User type representing a "restricted profile" user, which is a full user that is subject to certain restrictions from a parent user. Note, however, that it is NOT technically a profile.
USER_TYPE_PROFILE_MANAGED	android.os.usertype.profile.MANAGED	DPC是啥？APN里面有查询	User type representing a managed profile, which is a profile that is to be managed by a device policy controller (DPC). The intended purpose is for work profiles, which are managed by a corporate entity.  @FlaggedApi(android.os.Flags.FLAG_ALLOW_PRIVATE_PROFILE)
USER_TYPE_PROFILE_CLONE	android.os.usertype.profile.CLONE	克隆某用户	User type representing a clone profile. Clone profile is a user profile type used to run second instance of an otherwise single user App (eg, messengers). Currently only the {@link android.content.pm.UserInfo#isMain()} user can have a clone profile. @FlaggedApi(android.os.Flags.FLAG_ALLOW_PRIVATE_PROFILE)
USER_TYPE_PROFILE_PRIVATE	android.os.usertype.profile.PRIVATE		User type representing a private profile. Private profile is a user profile that can be used as an alternative user-space to install and use sensitive apps. UI surfaces can adopt an alternative strategy to show apps belonging to this profile, in line with their sensitive nature.   @FlaggedApi(android.os.Flags.FLAG_ALLOW_PRIVATE_PROFILE)
USER_TYPE_PROFILE_TEST	android.os.usertype.profile.TEST	测试	User type representing a generic profile for testing purposes. Only on debuggable builds.
USER_TYPE_PROFILE_COMMUNAL	android.os.usertype.profile.COMMUNAL	多个用户共享一些资源而不共享敏感信息。	User type representing a communal profile, which is shared by all users of the device.

public static final String USER_TYPE_FULL_SYSTEM = "android.os.usertype.full.SYSTEM";
public static final String USER_TYPE_FULL_SECONDARY = "android.os.usertype.full.SECONDARY";
public static final String USER_TYPE_FULL_GUEST = "android.os.usertype.full.GUEST";
public static final String USER_TYPE_FULL_DEMO = "android.os.usertype.full.DEMO";
public static final String USER_TYPE_FULL_RESTRICTED = "android.os.usertype.full.RESTRICTED";
public static final String USER_TYPE_PROFILE_MANAGED = "android.os.usertype.profile.MANAGED";
public static final String USER_TYPE_PROFILE_CLONE = "android.os.usertype.profile.CLONE";
public static final String USER_TYPE_PROFILE_PRIVATE = "android.os.usertype.profile.PRIVATE";
public static final String USER_TYPE_PROFILE_TEST = "android.os.usertype.profile.TEST";
public static final String USER_TYPE_PROFILE_COMMUNAL = "android.os.usertype.profile.COMMUNAL";
public static final String USER_TYPE_FULL_SYSTEM = "android.os.usertype.full.SYSTEM";
public static final String USER_TYPE_FULL_SECONDARY = "android.os.usertype.full.SECONDARY";
public static final String USER_TYPE_FULL_GUEST = "android.os.usertype.full.GUEST";
public static final String USER_TYPE_FULL_DEMO = "android.os.usertype.full.DEMO";
public static final String USER_TYPE_FULL_RESTRICTED = "android.os.usertype.full.RESTRICTED";
public static final String USER_TYPE_PROFILE_MANAGED = "android.os.usertype.profile.MANAGED";
public static final String USER_TYPE_PROFILE_CLONE = "android.os.usertype.profile.CLONE";
public static final String USER_TYPE_PROFILE_PRIVATE = "android.os.usertype.profile.PRIVATE";
public static final String USER_TYPE_PROFILE_TEST = "android.os.usertype.profile.TEST";
public static final String USER_TYPE_PROFILE_COMMUNAL = "android.os.usertype.profile.COMMUNAL";
public static final String USER_TYPE_SYSTEM_HEADLESS = "android.os.usertype.system.HEADLESS";