android/app/ActivityManagerInternal.java

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.app;

import static android.app.ActivityManager.StopUserOnSwitch;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.UserIdInt;
import android.app.ActivityManager.ProcessCapability;
import android.content.ComponentName;
import android.content.IIntentReceiver;
import android.content.IIntentSender;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ActivityPresentationInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.UserInfo;
import android.net.Uri;
import android.os.Bundle;
import android.os.IBinder;
import android.os.PowerExemptionManager.ReasonCode;
import android.os.PowerExemptionManager.TempAllowListType;
import android.os.TransactionTooLargeException;
import android.os.WorkSource;
import android.util.ArraySet;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * Activity manager local system service interface.
 *
 * @hide Only for use within the system server.
 */
public abstract class ActivityManagerInternal {

    public enum ServiceNotificationPolicy {
        /**
         * The Notification is not associated with any foreground service.
         */
        NOT_FOREGROUND_SERVICE,
        /**
         * The Notification is associated with a foreground service, but the
         * notification system should handle it just like non-FGS notifications.
         */
        SHOW_IMMEDIATELY,
        /**
         * The Notification is associated with a foreground service, and the
         * notification system should ignore it unless it has already been shown (in
         * which case it should be used to update the currently displayed UI).
         */
        UPDATE_ONLY
    }

    // Access modes for handleIncomingUser.
    public static final int ALLOW_NON_FULL = 0;
    /**
     * Allows access to a caller with {@link android.Manifest.permission#INTERACT_ACROSS_USERS}
     * if in the same profile group.
     * Otherwise, {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} is required.
     */
    public static final int ALLOW_NON_FULL_IN_PROFILE = 1;
    public static final int ALLOW_FULL_ONLY = 2;
    /**
     * Allows access to a caller with {@link android.Manifest.permission#INTERACT_ACROSS_PROFILES}
     * or {@link android.Manifest.permission#INTERACT_ACROSS_USERS} if in the same profile group.
     * Otherwise, {@link android.Manifest.permission#INTERACT_ACROSS_USERS_FULL} is required.
     */
    public static final int ALLOW_ALL_PROFILE_PERMISSIONS_IN_PROFILE = 3;

    /**
     * Verify that calling app has access to the given provider.
     */
    public abstract String checkContentProviderAccess(String authority, @UserIdInt int userId);

    /**
     * Verify that calling UID has access to the given provider.
     */
    public abstract int checkContentProviderUriPermission(Uri uri, @UserIdInt int userId,
            int callingUid, int modeFlags);

    // Called by the power manager.
    public abstract void onWakefulnessChanged(int wakefulness);

    /**
     * @return {@code true} if process start is successful, {@code false} otherwise.
     */
    public abstract boolean startIsolatedProcess(String entryPoint, String[] mainArgs,
            String processName, String abiOverride, int uid, Runnable crashHandler);

    /**
     * Called when a user has been deleted. This can happen during normal device usage
     * or just at startup, when partially removed users are purged. Any state persisted by the
     * ActivityManager should be purged now.
     *
     * @param userId The user being cleaned up.
     */
    public abstract void onUserRemoved(@UserIdInt int userId);

    /**
     * Kill foreground apps from the specified user.
     */
    public abstract void killForegroundAppsForUser(@UserIdInt int userId);

    /**
     * Sets how long a {@link PendingIntent} can be temporarily allowlisted to bypass restrictions
     * such as Power Save mode.
     * @param target
     * @param allowlistToken
     * @param duration temp allowlist duration in milliseconds.
     * @param type temp allowlist type defined at {@link TempAllowListType}
     * @param reasonCode one of {@link ReasonCode}
     * @param reason A human-readable reason for logging purposes.
     */
    public abstract void setPendingIntentAllowlistDuration(IIntentSender target,
            IBinder allowlistToken, long duration, @TempAllowListType int type,
            @ReasonCode int reasonCode, @Nullable String reason);

    /**
     * Returns the flags set for a {@link PendingIntent}.
     */
    public abstract int getPendingIntentFlags(IIntentSender target);

    /**
     * Allows a {@link PendingIntent} to start activities from background.
     */
    public abstract void setPendingIntentAllowBgActivityStarts(
            IIntentSender target, IBinder allowlistToken, int flags);

    /**
     * Voids {@link PendingIntent}'s privilege to start activities from background.
     */
    public abstract void clearPendingIntentAllowBgActivityStarts(IIntentSender target,
            IBinder allowlistToken);

    /**
     * Allow DeviceIdleController to tell us about what apps are allowlisted.
     */
    public abstract void setDeviceIdleAllowlist(int[] allAppids, int[] exceptIdleAppids);

    /**
     * Update information about which app IDs are on the temp allowlist.
     * @param appids the updated list of appIds in temp allowlist.
     *               If null, it is to update only changingUid.
     * @param changingUid uid to add or remove to temp allowlist.
     * @param adding true to add to temp allowlist, false to remove from temp allowlist.
     * @param durationMs when adding is true, the duration to be in temp allowlist.
     * @param type temp allowlist type defined at {@link TempAllowListType}.
     * @param reasonCode one of {@link ReasonCode}
     * @param reason A human-readable reason for logging purposes.
     * @param callingUid the callingUid that setup this temp allowlist, only valid when param adding
     *                   is true.
     */
    public abstract void updateDeviceIdleTempAllowlist(@Nullable int[] appids, int changingUid,
            boolean adding, long durationMs, @TempAllowListType int type,
            @ReasonCode int reasonCode,
            @Nullable String reason, int callingUid);

    /**
     * Get the procstate for the UID.  The return value will be between
     * {@link ActivityManager#MIN_PROCESS_STATE} and {@link ActivityManager#MAX_PROCESS_STATE}.
     * Note if the UID doesn't exist, it'll return {@link ActivityManager#PROCESS_STATE_NONEXISTENT}
     * (-1).
     */
    public abstract int getUidProcessState(int uid);

    /**
     * Get a map of pid and package name that process of that pid Android/data and Android/obb
     * directory is not mounted to lowerfs.
     */
    public abstract Map<Integer, String> getProcessesWithPendingBindMounts(int userId);

    /**
     * @return {@code true} if system is ready, {@code false} otherwise.
     */
    public abstract boolean isSystemReady();

    /**
     * Sets if the given pid has an overlay UI or not.
     *
     * @param pid The pid we are setting overlay UI for.
     * @param hasOverlayUi True if the process has overlay UI.
     * @see android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY
     */
    public abstract void setHasOverlayUi(int pid, boolean hasOverlayUi);

    /**
     * Called after the network policy rules are updated by
     * {@link com.android.server.net.NetworkPolicyManagerService} for a specific {@param uid} and
     * {@param procStateSeq}.
     */
    public abstract void notifyNetworkPolicyRulesUpdated(int uid, long procStateSeq);

    /**
     * @return true if runtime was restarted, false if it's normal boot
     */
    public abstract boolean isRuntimeRestarted();

    /**
     * Returns if more users can be started without stopping currently running users.
     */
    public abstract boolean canStartMoreUsers();

    /**
     * Sets the user switcher message for switching from {@link android.os.UserHandle#SYSTEM}.
     */
    public abstract void setSwitchingFromSystemUserMessage(String switchingFromSystemUserMessage);

    /**
     * Sets the user switcher message for switching to {@link android.os.UserHandle#SYSTEM}.
     */
    public abstract void setSwitchingToSystemUserMessage(String switchingToSystemUserMessage);

    /**
     * Returns maximum number of users that can run simultaneously.
     */
    public abstract int getMaxRunningUsers();

    /**
     * Whether an UID is active or idle.
     */
    public abstract boolean isUidActive(int uid);

    /**
     * Returns a list of running processes along with corresponding uids, pids and their oom score.
     *
     * Only processes managed by ActivityManagerService are included.
     */
    public abstract List<ProcessMemoryState> getMemoryStateForProcesses();

    /**
     * Checks to see if the calling pid is allowed to handle the user. Returns adjusted user id as
     * needed.
     */
    public abstract int handleIncomingUser(int callingPid, int callingUid, @UserIdInt int userId,
            boolean allowAll, int allowMode, String name, String callerPackage);

    /** Checks if the calling binder pid as the permission. */
    public abstract void enforceCallingPermission(String permission, String func);

    /** Returns the current user id. */
    public abstract int getCurrentUserId();

    /** Returns the currently started user ids. */
    public abstract int[] getStartedUserIds();

    /** Returns true if the user is running. */
    public abstract boolean isUserRunning(@UserIdInt int userId, int flags);

    /** Trims memory usage in the system by removing/stopping unused application processes. */
    public abstract void trimApplications();

    /** Kill the processes in the list due to their tasks been removed. */
    public abstract void killProcessesForRemovedTask(ArrayList<Object> procsToKill);

    /** Kill the process immediately. */
    public abstract void killProcess(String processName, int uid, String reason);

    /**
     * Returns {@code true} if {@code uid} is running an activity from {@code packageName}.
     */
    public abstract boolean hasRunningActivity(int uid, @Nullable String packageName);

    public abstract void updateOomAdj();
    public abstract void updateCpuStats();

    /**
     * Update battery stats on activity usage.
     * @param activity
     * @param uid
     * @param userId
     * @param started
     */
    public abstract void updateBatteryStats(
            ComponentName activity, int uid, @UserIdInt int userId, boolean resumed);

    /**
     * Update UsageStats of the activity.
     * @param activity
     * @param userId
     * @param event
     * @param appToken ActivityRecord's appToken.
     * @param taskRoot Task's root
     */
    public abstract void updateActivityUsageStats(
            ComponentName activity, @UserIdInt int userId, int event, IBinder appToken,
            ComponentName taskRoot);
    public abstract void updateForegroundTimeIfOnBattery(
            String packageName, int uid, long cpuTimeDiff);
    public abstract void sendForegroundProfileChanged(@UserIdInt int userId);

    /**
     * Returns whether the given user requires credential entry at this time. This is used to
     * intercept activity launches for locked work apps due to work challenge being triggered or
     * when the profile user is yet to be unlocked.
     */
    public abstract boolean shouldConfirmCredentials(@UserIdInt int userId);

    /**
     * Used in conjunction with {@link #noteAlarmStart(PendingIntent, WorkSource, int, String)} to
     * note an alarm duration for battery attribution
     */
    public abstract void noteAlarmFinish(PendingIntent ps, WorkSource workSource, int sourceUid,
            String tag);

    /**
     * Used in conjunction with {@link #noteAlarmFinish(PendingIntent, WorkSource, int, String)} to
     * note an alarm duration for battery attribution
     */
    public abstract void noteAlarmStart(PendingIntent ps, WorkSource workSource, int sourceUid,
            String tag);

    /**
     * Used to note a wakeup alarm for battery attribution.
     */
    public abstract void noteWakeupAlarm(PendingIntent ps, WorkSource workSource, int sourceUid,
            String sourcePkg, String tag);

    /**
     * Returns whether this app is disallowed to run in the background.
     *
     * @see ActivityManager#APP_START_MODE_DISABLED
     */
    public abstract boolean isAppStartModeDisabled(int uid, String packageName);

    public abstract int[] getCurrentProfileIds();
    public abstract UserInfo getCurrentUser();
    public abstract void ensureNotSpecialUser(@UserIdInt int userId);
    public abstract boolean isCurrentProfile(@UserIdInt int userId);
    public abstract boolean hasStartedUserState(@UserIdInt int userId);
    public abstract void finishUserSwitch(Object uss);

    /** Schedule the execution of all pending app GCs. */
    public abstract void scheduleAppGcs();

    /** Gets the task id for a given activity. */
    public abstract int getTaskIdForActivity(@NonNull IBinder token, boolean onlyRoot);

    /** Gets the basic info for a given activity. */
    public abstract ActivityPresentationInfo getActivityPresentationInfo(@NonNull IBinder token);

    public abstract void setBooting(boolean booting);
    public abstract boolean isBooting();
    public abstract void setBooted(boolean booted);
    public abstract boolean isBooted();
    public abstract void finishBooting();

    /**
     * Temp allowlist a UID for PendingIntent.
     * @param callerPid the PID that sent the PendingIntent.
     * @param callerUid the UID that sent the PendingIntent.
     * @param targetUid the UID that is been temp allowlisted.
     * @param duration temp allowlist duration in milliseconds.
     * @param type temp allowlist type defined at {@link TempAllowListType}
     * @param reasonCode one of {@link ReasonCode}
     * @param reason
     */
    public abstract void tempAllowlistForPendingIntent(int callerPid, int callerUid, int targetUid,
            long duration, int type, @ReasonCode int reasonCode, String reason);

    public abstract int broadcastIntentInPackage(String packageName, @Nullable String featureId,
            int uid, int realCallingUid, int realCallingPid, Intent intent, String resolvedType,
            IIntentReceiver resultTo, int resultCode, String resultData, Bundle resultExtras,
            String requiredPermission, Bundle bOptions, boolean serialized, boolean sticky,
            @UserIdInt int userId, boolean allowBackgroundActivityStarts,
            @Nullable IBinder backgroundActivityStartsToken);

    public abstract ComponentName startServiceInPackage(int uid, Intent service,
            String resolvedType, boolean fgRequired, String callingPackage,
            @Nullable String callingFeatureId, @UserIdInt int userId,
            boolean allowBackgroundActivityStarts,
            @Nullable IBinder backgroundActivityStartsToken) throws TransactionTooLargeException;

    public abstract void disconnectActivityFromServices(Object connectionHolder);
    public abstract void cleanUpServices(@UserIdInt int userId, ComponentName component,
            Intent baseIntent);
    public abstract ActivityInfo getActivityInfoForUser(ActivityInfo aInfo, @UserIdInt int userId);
    public abstract void ensureBootCompleted();
    public abstract void updateOomLevelsForDisplay(int displayId);
    public abstract boolean isActivityStartsLoggingEnabled();
    /** Returns true if the background activity starts is enabled. */
    public abstract boolean isBackgroundActivityStartsEnabled();
    public abstract void reportCurKeyguardUsageEvent(boolean keyguardShowing);

    /** @see com.android.server.am.ActivityManagerService#monitor */
    public abstract void monitor();

    /** Input dispatch timeout to a window, start the ANR process. Return the timeout extension,
     * in milliseconds, or 0 to abort dispatch. */
    public abstract long inputDispatchingTimedOut(int pid, boolean aboveSystem, String reason);
    public abstract boolean inputDispatchingTimedOut(Object proc, String activityShortComponentName,
            ApplicationInfo aInfo, String parentShortComponentName, Object parentProc,
            boolean aboveSystem, String reason);
    /**
     * App started responding to input events. This signal can be used to abort the ANR process and
     * hide the ANR dialog.
     */
    public abstract void inputDispatchingResumed(int pid);

    /**
     * Sends {@link android.content.Intent#ACTION_CONFIGURATION_CHANGED} with all the appropriate
     * flags.
     */
    public abstract void broadcastGlobalConfigurationChanged(int changes, boolean initLocale);

    /**
     * Sends {@link android.content.Intent#ACTION_CLOSE_SYSTEM_DIALOGS} with all the appropriate
     * flags.
     */
    public abstract void broadcastCloseSystemDialogs(String reason);

    /**
     * Kills all background processes, except those matching any of the specified properties.
     *
     * @param minTargetSdk the target SDK version at or above which to preserve processes,
     *                     or {@code -1} to ignore the target SDK
     * @param maxProcState the process state at or below which to preserve processes,
     *                     or {@code -1} to ignore the process state
     */
    public abstract void killAllBackgroundProcessesExcept(int minTargetSdk, int maxProcState);

    /** Starts a given process. */
    public abstract void startProcess(String processName, ApplicationInfo info,
            boolean knownToBeDead, boolean isTop, String hostingType, ComponentName hostingName);

    /** Starts up the starting activity process for debugging if needed.
     * This function needs to be called synchronously from WindowManager context so the caller
     * passes a lock {@code wmLock} and waits to be notified.
     *
     * @param wmLock calls {@code notify} on the object to wake up the caller.
    */
    public abstract void setDebugFlagsForStartingActivity(ActivityInfo aInfo, int startFlags,
            ProfilerInfo profilerInfo, Object wmLock);

    /** Returns mount mode for process running with given pid */
    public abstract int getStorageMountMode(int pid, int uid);

    /** Returns true if the given uid is the app in the foreground. */
    public abstract boolean isAppForeground(int uid);

    /** Returns true if the given process name and uid is currently marked 'bad' */
    public abstract boolean isAppBad(String processName, int uid);

    /** Remove pending backup for the given userId. */
    public abstract void clearPendingBackup(@UserIdInt int userId);

    /**
     * When power button is very long pressed, call this interface to do some pre-shutdown work
     * like persisting database etc.
     */
    public abstract void prepareForPossibleShutdown();

    /**
     * Returns {@code true} if {@code uid} is running a foreground service of a specific
     * {@code foregroundServiceType}.
     */
    public abstract boolean hasRunningForegroundService(int uid, int foregroundServiceType);

    /**
     * Returns {@code true} if the given notification channel currently has a
     * notification associated with a foreground service.  This is an AMS check
     * because that is the source of truth for the FGS state.
     */
    public abstract boolean hasForegroundServiceNotification(String pkg, @UserIdInt int userId,
            String channelId);

    /**
     * Tell the service lifecycle logic that the given Notification content is now
     * canonical for any foreground-service visibility policy purposes.
     *
     * Returns a description of any FGs-related policy around the given Notification:
     * not associated with an FGS; ensure display; or only update if already displayed.
     */
    public abstract ServiceNotificationPolicy applyForegroundServiceNotification(
            Notification notification, String tag, int id, String pkg, @UserIdInt int userId);

    /**
     * Callback from the notification subsystem that the given FGS notification has
     * been evaluated, and either shown or explicitly overlooked.  This can happen
     * after either Service.startForeground() or NotificationManager.notify().
     */
    public abstract void onForegroundServiceNotificationUpdate(boolean shown,
            Notification notification, int id, String pkg, @UserIdInt int userId);

    /**
     * If the given app has any FGSs whose notifications are in the given channel,
     * stop them.
     */
    public abstract void stopForegroundServicesForChannel(String pkg, @UserIdInt int userId,
            String channelId);

    /**
     * Registers the specified {@code processObserver} to be notified of future changes to
     * process state.
     */
    public abstract void registerProcessObserver(IProcessObserver processObserver);

    /**
     * Unregisters the specified {@code processObserver}.
     */
    public abstract void unregisterProcessObserver(IProcessObserver processObserver);

    /**
     * Checks if there is an unfinished instrumentation that targets the given uid.
     *
     * @param uid The uid to be checked for
     *
     * @return True, if there is an instrumentation whose target application uid matches the given
     * uid, false otherwise
     */
    public abstract boolean isUidCurrentlyInstrumented(int uid);

    /** Is this a device owner app? */
    public abstract boolean isDeviceOwner(int uid);

    /**
     * Called by DevicePolicyManagerService to set the uid of the device owner.
     */
    public abstract void setDeviceOwnerUid(int uid);

    /** Is this a profile owner app? */
    public abstract boolean isProfileOwner(int uid);

    /**
     * Called by DevicePolicyManagerService to set the uid of the profile owner.
     * @param profileOwnerUids The profile owner UIDs. The ownership of the array is
     *                         passed to callee.
     */
    public abstract void setProfileOwnerUid(ArraySet<Integer> profileOwnerUids);

    /**
     * Set all associated companion app that belongs to a userId.
     * @param userId
     * @param companionAppUids  ActivityManager will take ownership of this Set, the caller
     *                          shouldn't touch this Set after calling this interface.
     */
    public abstract void setCompanionAppUids(int userId, Set<Integer> companionAppUids);

    /**
     * is the uid an associated companion app of a userId?
     * @param userId
     * @param uid
     * @return
     */
    public abstract boolean isAssociatedCompanionApp(int userId, int uid);

    /**
     * Sends a broadcast, assuming the caller to be the system and allowing the inclusion of an
     * approved allowlist of app Ids >= {@link android.os.Process#FIRST_APPLICATION_UID} that the
     * broadcast my be sent to; any app Ids < {@link android.os.Process#FIRST_APPLICATION_UID} are
     * automatically allowlisted.
     *
     * @see com.android.server.am.ActivityManagerService#broadcastIntentWithFeature(
     *      IApplicationThread, String, Intent, String, IIntentReceiver, int, String, Bundle,
     *      String[], int, Bundle, boolean, boolean, int)
     */
    public abstract int broadcastIntent(Intent intent,
            IIntentReceiver resultTo,
            String[] requiredPermissions, boolean serialized,
            int userId, int[] appIdAllowList, @Nullable Bundle bOptions);

    /**
     * Add uid to the ActivityManagerService PendingStartActivityUids list.
     * @param uid uid
     * @param pid pid of the ProcessRecord that is pending top.
     */
    public abstract void addPendingTopUid(int uid, int pid);

    /**
     * Delete uid from the ActivityManagerService PendingStartActivityUids list.
     * @param uid uid
     */
    public abstract void deletePendingTopUid(int uid);

    /**
     * Is the uid in ActivityManagerService PendingStartActivityUids list?
     * @param uid
     * @return true if exists, false otherwise.
     */
    public abstract boolean isPendingTopUid(int uid);

    /**
     * @return the intent for the given intent sender.
     */
    @Nullable
    public abstract Intent getIntentForIntentSender(IIntentSender sender);

    /**
     * Effectively PendingIntent.getActivityForUser(), but the PendingIntent is
     * owned by the given uid rather than by the caller (i.e. the system).
     */
    public abstract PendingIntent getPendingIntentActivityAsApp(
            int requestCode, @NonNull Intent intent, int flags, Bundle options,
            String ownerPkgName, int ownerUid);

    /**
     * Effectively PendingIntent.getActivityForUser(), but the PendingIntent is
     * owned by the given uid rather than by the caller (i.e. the system).
     */
    public abstract PendingIntent getPendingIntentActivityAsApp(
            int requestCode, @NonNull Intent[] intents, int flags, Bundle options,
            String ownerPkgName, int ownerUid);

    /**
     * @return mBootTimeTempAllowlistDuration of ActivityManagerConstants.
     */
    public abstract long getBootTimeTempAllowListDuration();

    /** Register an {@link AnrController} to control the ANR dialog behavior */
    public abstract void registerAnrController(AnrController controller);

    /** Unregister an {@link AnrController} */
    public abstract void unregisterAnrController(AnrController controller);

    /**
     * Is the FGS started from an uid temporarily allowed to have while-in-use permission?
     */
    public abstract boolean isTempAllowlistedForFgsWhileInUse(int uid);

    /**
     * Return the temp allowlist type when server push messaging is over the quota.
     */
    public abstract @TempAllowListType int getPushMessagingOverQuotaBehavior();

    /**
     * Returns the capability of the given uid
     */
    public abstract @ProcessCapability int getUidCapability(int uid);

    /**
     * @return The PID list of the isolated process with packages matching the given uid.
     */
    @Nullable
    public abstract List<Integer> getIsolatedProcesses(int uid);

    /** @see ActivityManagerService#sendIntentSender */
    public abstract int sendIntentSender(IIntentSender target, IBinder allowlistToken, int code,
            Intent intent, String resolvedType,
            IIntentReceiver finishedReceiver, String requiredPermission, Bundle options);

    /**
     * Sets the provider to communicate between voice interaction manager service and
     * ActivityManagerService.
     */
    public abstract void setVoiceInteractionManagerProvider(
            @Nullable VoiceInteractionManagerProvider provider);

    /**
     * Sets whether the current foreground user (and its profiles) should be stopped after switched
     * out.
     */
    public abstract void setStopUserOnSwitch(@StopUserOnSwitch int value);

    /**
     * Provides the interface to communicate between voice interaction manager service and
     * ActivityManagerService.
     */
    public interface VoiceInteractionManagerProvider {
        /**
         * Notifies the service when a high-level activity event has been changed, for example,
         * an activity was resumed or stopped.
         */
        void notifyActivityEventChanged();
    }
}