管理多位使用者

val dpm = getContext().getSystemService(Context.DEVICE_POLICY_SERVICE)
        as DevicePolicyManager

// If possible, reuse an existing affiliation ID across the
// primary user and (later) the ephemeral user.
val identifiers = dpm.getAffiliationIds(adminName)
if (identifiers.isEmpty()) {
    identifiers.add(UUID.randomUUID().toString())
    dpm.setAffiliationIds(adminName, identifiers)
}

// Pass an affiliation ID to the ephemeral user in the admin extras.
val adminExtras = PersistableBundle()
adminExtras.putString(AFFILIATION_ID_KEY, identifiers.first())
// Include any other config for the new user here ...

// Create the ephemeral user, using this component as the admin.
try {
    val ephemeralUser = dpm.createAndManageUser(
            adminName,
            "tmp_user",
            adminName,
            adminExtras,
            DevicePolicyManager.MAKE_USER_EPHEMERAL or
                    DevicePolicyManager.SKIP_SETUP_WIZARD)

} catch (e: UserManager.UserOperationException) {
    if (e.userOperationResult ==
            UserManager.USER_OPERATION_ERROR_MAX_USERS) {
        // Find a way to free up users...
    }
}

DevicePolicyManager dpm = (DevicePolicyManager)
    getContext().getSystemService(Context.DEVICE_POLICY_SERVICE);

// If possible, reuse an existing affiliation ID across the
// primary user and (later) the ephemeral user.
Set<String> identifiers = dpm.getAffiliationIds(adminName);
if (identifiers.isEmpty()) {
  identifiers.add(UUID.randomUUID().toString());
  dpm.setAffiliationIds(adminName, identifiers);
}

// Pass an affiliation ID to the ephemeral user in the admin extras.
PersistableBundle adminExtras = new PersistableBundle();
adminExtras.putString(AFFILIATION_ID_KEY, identifiers.iterator().next());
// Include any other config for the new user here ...

// Create the ephemeral user, using this component as the admin.
try {
  UserHandle ephemeralUser = dpm.createAndManageUser(
      adminName,
      "tmp_user",
      adminName,
      adminExtras,
      DevicePolicyManager.MAKE_USER_EPHEMERAL |
          DevicePolicyManager.SKIP_SETUP_WIZARD);

} catch (UserManager.UserOperationException e) {
  if (e.getUserOperationResult() ==
      UserManager.USER_OPERATION_ERROR_MAX_USERS) {
    // Find a way to free up users...
  }
}

// After calling createAndManageUser() use a device-unique serial number
// (that isn’t recycled) to identify the new user.
secondaryUser?.let {
    val userManager = getContext().getSystemService(UserManager::class.java)
    val ephemeralUserId = userManager!!.getSerialNumberForUser(it)
    // Save the serial number to storage  ...
}

// After calling createAndManageUser() use a device-unique serial number
// (that isn’t recycled) to identify the new user.
if (secondaryUser != null) {
  UserManager userManager = getContext().getSystemService(UserManager.class);
  long ephemeralUserId = userManager.getSerialNumberForUser(secondaryUser);
  // Save the serial number to storage  ...
}

// The device is stored for the night. Stop all running secondary users.
dpm.getSecondaryUsers(adminName).forEach {
    dpm.stopUser(adminName, it)
}

// The device is stored for the night. Stop all running secondary users.
for (UserHandle user : dpm.getSecondaryUsers(adminName)) {
  dpm.stopUser(adminName, user);
}

// Explicitly disallow logging out using Android UI (disabled by default).
dpm.setLogoutEnabled(adminName, false)

// Disallow switching users in Android's UI. This DPC can still
// call switchUser() to manage users.
dpm.addUserRestriction(adminName, UserManager.DISALLOW_USER_SWITCH)

// Explicitly disallow logging out using Android UI (disabled by default).
dpm.setLogoutEnabled(adminName, false);

// Disallow switching users in Android's UI. This DPC can still
// call switchUser() to manage users.
dpm.addUserRestriction(adminName, UserManager.DISALLOW_USER_SWITCH);

// Short, easy-to-read messages shown at the start and end of a session.
// In your app, store these strings in a localizable resource.
internal val START_USER_SESSION_MESSAGE = "Starting guest session…"
internal val END_USER_SESSION_MESSAGE = "Stopping & clearing data…"

// ...
dpm.setStartUserSessionMessage(adminName, START_USER_SESSION_MESSAGE)
dpm.setEndUserSessionMessage(adminName, END_USER_SESSION_MESSAGE)

// Short, easy-to-read messages shown at the start and end of a session.
// In your app, store these strings in a localizable resource.
private static final String START_USER_SESSION_MESSAGE = "Starting guest session…";
private static final String END_USER_SESSION_MESSAGE = "Stopping & clearing data…";

// ...
dpm.setStartUserSessionMessage(adminName, START_USER_SESSION_MESSAGE);
dpm.setEndUserSessionMessage(adminName, END_USER_SESSION_MESSAGE);

override fun onReceive(context: Context?, intent: Intent?) {
    // Added the <action android:name="android.intent.action.LOCALE_CHANGED" />
    // intent filter for our DeviceAdminReceiver subclass in the app manifest file.
    if (intent?.action === ACTION_LOCALE_CHANGED) {

        // Android's resources return a string suitable for the new locale.
        getManager(context).setStartUserSessionMessage(
                getWho(context),
                context?.getString(R.string.start_user_session_message))

        getManager(context).setEndUserSessionMessage(
                getWho(context),
                context?.getString(R.string.end_user_session_message))
    }
    super.onReceive(context, intent)
}

public void onReceive(Context context, Intent intent) {
  // Added the <action android:name="android.intent.action.LOCALE_CHANGED" />
  // intent filter for our DeviceAdminReceiver subclass in the app manifest file.
  if (intent.getAction().equals(ACTION_LOCALE_CHANGED)) {

    // Android's resources return a string suitable for the new locale.
    getManager(context).setStartUserSessionMessage(
        getWho(context),
        context.getString(R.string.start_user_session_message));

    getManager(context).setEndUserSessionMessage(
        getWho(context),
        context.getString(R.string.end_user_session_message));
  }
  super.onReceive(context, intent);
}

override fun onEnabled(context: Context?, intent: Intent?) {
    super.onEnabled(context, intent)

    // Get the affiliation ID (our DPC previously put in the extras) and
    // set the ID for this new secondary user.
    intent?.getStringExtra(AFFILIATION_ID_KEY)?.let {
        val dpm = getManager(context)
        dpm.setAffiliationIds(getWho(context), setOf(it))
    }
    // Continue setup of the new secondary user ...
}

public void onEnabled(Context context, Intent intent) {
  // Get the affiliation ID (our DPC previously put in the extras) and
  // set the ID for this new secondary user.
  String affiliationId = intent.getStringExtra(AFFILIATION_ID_KEY);
  if (affiliationId != null) {
    DevicePolicyManager dpm = getManager(context);
    dpm.setAffiliationIds(getWho(context),
        new HashSet<String>(Arrays.asList(affiliationId)));
  }
  // Continue setup of the new secondary user ...
}

// From a secondary user, the list contains just the primary user.
dpm.getBindDeviceAdminTargetUsers(adminName).forEach {

    // Set up the callbacks for the service connection.
    val intent = Intent(mContext, FullyManagedDeviceService::class.java)
    val serviceconnection = object : ServiceConnection {
        override fun onServiceConnected(componentName: ComponentName,
                                        iBinder: IBinder) {
            // Call methods on service ...
        }
        override fun onServiceDisconnected(componentName: ComponentName) {
            // Clean up or reconnect if needed ...
        }
    }

    // Bind to the service as the primary user [it].
    val bindSuccessful = dpm.bindDeviceAdminServiceAsUser(adminName,
            intent,
            serviceconnection,
            Context.BIND_AUTO_CREATE,
            it)
}

// From a secondary user, the list contains just the primary user.
List<UserHandle> targetUsers = dpm.getBindDeviceAdminTargetUsers(adminName);
if (targetUsers.isEmpty()) {
  // If the users aren't affiliated, the list doesn't contain any users.
  return;
}

// Set up the callbacks for the service connection.
Intent intent = new Intent(mContext, FullyManagedDeviceService.class);
ServiceConnection serviceconnection = new ServiceConnection() {
  @Override
  public void onServiceConnected(
      ComponentName componentName, IBinder iBinder) {
    // Call methods on service ...
  }

  @Override
  public void onServiceDisconnected(ComponentName componentName) {
    // Clean up or reconnect if needed ...
  }
};

// Bind to the service as the primary user.
UserHandle primaryUser = targetUsers.get(0);
boolean bindSuccessful = dpm.bindDeviceAdminServiceAsUser(
    adminName,
    intent,
    serviceconnection,
    Context.BIND_AUTO_CREATE,
    primaryUser);