packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarAppsModel.java - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2015 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 com.android.systemui.statusbar.phone;

 import android.app.AppGlobals;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
 import android.content.pm.IPackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.pm.UserInfo;
 import android.os.RemoteException;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.util.Slog;

 import com.android.internal.annotations.VisibleForTesting;

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

 /**
  * Data model and controller for app icons appearing in the navigation bar. The data is stored on
  * disk in SharedPreferences. Each icon has a separate pref entry consisting of a flattened
  * ComponentName.
  */
 class NavigationBarAppsModel {
     public interface OnAppsChangedListener {
         void onPinnedAppsChanged();
     }

     public class ResolvedApp {
         Intent launchIntent;
         ResolveInfo ri;
     }

     private final static String TAG = "NavigationBarAppsModel";

     // Default number of apps to load initially.
     private final static int NUM_INITIAL_APPS = 4;

     // Preferences file name.
     private final static String SHARED_PREFERENCES_NAME = "com.android.systemui.navbarapps";

     // Preference name for the version of the other preferences.
     private final static String VERSION_PREF = "version";

     // Current version number for preferences.
     private final static int CURRENT_VERSION = 3;

     // Preference name for the number of app icons.
     private final static String APP_COUNT_PREF = "app_count";

     // Preference name prefix for each app's info. The actual pref has an integer appended to it.
     private final static String APP_PREF_PREFIX = "app_";

     // User serial number prefix for each app's info. The actual pref has an integer appended to it.
     private final static String APP_USER_PREFIX = "app_user_";

     // Character separating current user serial number from the user-specific part of a pref.
     // Example "22|app_user_2" - when logged as user with serial 22, we'll use this pref for the
     // user serial of the third app of the logged-in user.
     private final static char USER_SEPARATOR = '|';

     private final Context mContext;
     private final UserManager mUserManager;
     private final SharedPreferences mPrefs;

     // Apps are represented as an ordered list of app infos.
     private List<AppInfo> mApps = new ArrayList<AppInfo>();

     private List<OnAppsChangedListener> mOnAppsChangedListeners =
             new ArrayList<OnAppsChangedListener>();

     // Id of the current user.
     private int mCurrentUserId = -1;

     // Serial number of the current user.
     private long mCurrentUserSerialNumber = -1;

     public NavigationBarAppsModel(Context context) {
         mContext = context;
         mPrefs = mContext.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);

         int version = mPrefs.getInt(VERSION_PREF, -1);
         if (version != CURRENT_VERSION) {
             // Since the data format changed, clean everything.
             SharedPreferences.Editor edit = mPrefs.edit();
             edit.clear();
             edit.putInt(VERSION_PREF, CURRENT_VERSION);
             edit.apply();
         }
     }

     @VisibleForTesting
     protected IPackageManager getPackageManager() {
         return AppGlobals.getPackageManager();
     }

     // Returns a resolved app info for a given app info, or null if the app info is unlauncheable.
     public ResolvedApp resolveApp(AppInfo appInfo) {
         ComponentName component = appInfo.getComponentName();
         int appUserId = appInfo.getUser().getIdentifier();

         if (mCurrentUserId != appUserId) {
             // Check if app user is a profile of current user and the app user is enabled.
             UserInfo appUserInfo = mUserManager.getUserInfo(appUserId);
             UserInfo currentUserInfo = mUserManager.getUserInfo(mCurrentUserId);
             if (appUserInfo == null || currentUserInfo == null
                     || appUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID
                     || appUserInfo.profileGroupId != currentUserInfo.profileGroupId
                     || !appUserInfo.isEnabled()) {
                 Slog.e(TAG, "User " + appUserId +
                         " is is not a profile of the current user, or is disabled.");
                 return null;
             }
         }

         // This code is based on LauncherAppsService.startActivityAsUser code.
         Intent launchIntent = new Intent(Intent.ACTION_MAIN);
         launchIntent.addCategory(Intent.CATEGORY_LAUNCHER);
         launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         launchIntent.setPackage(component.getPackageName());

         try {
             ActivityInfo info = getPackageManager().getActivityInfo(component, 0, appUserId);
             if (info == null) {
                 Slog.e(TAG, "Activity " + component + " is not installed.");
                 return null;
             }

             if (!info.exported) {
                 Slog.e(TAG, "Activity " + component + " doesn't have 'exported' attribute.");
                 return null;
             }
         } catch (RemoteException e) {
             Slog.e(TAG, "Failed to get activity info for " + component, e);
             return null;
         }

         // Check that the component actually has Intent.CATEGORY_LAUNCHER
         // as calling startActivityAsUser ignores the category and just
         // resolves based on the component if present.
         List<ResolveInfo> apps = mContext.getPackageManager().queryIntentActivitiesAsUser(launchIntent,
                 0 /* flags */, appUserId);
         final int size = apps.size();
         for (int i = 0; i < size; ++i) {
             ResolveInfo ri = apps.get(i);
             ActivityInfo activityInfo = ri.activityInfo;
             if (activityInfo.packageName.equals(component.getPackageName()) &&
                     activityInfo.name.equals(component.getClassName())) {
                 // Found an activity with category launcher that matches
                 // this component so ok to launch.
                 launchIntent.setComponent(component);
                 ResolvedApp resolvedApp = new ResolvedApp();
                 resolvedApp.launchIntent = launchIntent;
                 resolvedApp.ri = ri;
                 return resolvedApp;
             }
         }

         Slog.e(TAG, "Activity doesn't have category Intent.CATEGORY_LAUNCHER " + component);
         return null;
     }

     public void addOnAppsChangedListener(OnAppsChangedListener listener) {
         mOnAppsChangedListeners.add(listener);
     }

     public void removeOnAppsChangedListener(OnAppsChangedListener listener) {
         mOnAppsChangedListeners.remove(listener);
     }

     /**
      * Reinitializes the model for a new user.
      */
     public void setCurrentUser(int userId) {
         mCurrentUserId = userId;
         mCurrentUserSerialNumber = mUserManager.getSerialNumberForUser(new UserHandle(userId));

         mApps.clear();

         int appCount = mPrefs.getInt(userPrefixed(APP_COUNT_PREF), -1);
         if (appCount >= 0) {
             loadAppsFromPrefs(appCount);
         } else {
             // We switched to this user for the first time ever. This is a good opportunity to clean
             // prefs for users deleted in the past.
             removePrefsForDeletedUsers();

             addDefaultApps();
         }
     }

     /**
      * Removes prefs for users that don't exist on the device.
      */
     private void removePrefsForDeletedUsers() {
         // Build a set of string representations of serial numbers of the device users.
         final List<UserInfo> users = mUserManager.getUsers();
         final int userCount = users.size();

         final Set<String> userSerials = new HashSet<String> ();

         for (int i = 0; i < userCount; ++i) {
             userSerials.add(Long.toString(users.get(i).serialNumber));
         }

         // Walk though all prefs and delete ones which user is not in the string set.
         final Map<String, ?> allPrefs = mPrefs.getAll();
         final SharedPreferences.Editor edit = mPrefs.edit();

         for (Map.Entry<String, ?> pref : allPrefs.entrySet()) {
             final String key = pref.getKey();
             if (key.equals(VERSION_PREF)) continue;

             final int userSeparatorPos = key.indexOf(USER_SEPARATOR);

             if (userSeparatorPos < 0) {
                 // Removing anomalous pref with no user.
                 edit.remove(key);
                 continue;
             }

             final String prefUserSerial = key.substring(0, userSeparatorPos);

             if (!userSerials.contains(prefUserSerial)) {
                 // Removes pref for a not existing user.
                 edit.remove(key);
                 continue;
             }
         }

         edit.apply();
     }

     /** Returns the list of apps. */
     public List<AppInfo> getApps() {
         return mApps;
     }

     /** Sets the list of apps and saves it. */
     public void setApps(List<AppInfo> apps) {
         mApps = apps;
         savePrefs();

         int size = mOnAppsChangedListeners.size();
         for (int i = 0; i < size; ++i) {
             mOnAppsChangedListeners.get(i).onPinnedAppsChanged();
         }
     }

     /** Saves the current model to disk. */
     private void savePrefs() {
         SharedPreferences.Editor edit = mPrefs.edit();
         int appCount = mApps.size();
         edit.putInt(userPrefixed(APP_COUNT_PREF), appCount);
         for (int i = 0; i < appCount; i++) {
             final AppInfo appInfo = mApps.get(i);
             String componentNameString = appInfo.getComponentName().flattenToString();
             edit.putString(prefNameForApp(i), componentNameString);
             long userSerialNumber = mUserManager.getSerialNumberForUser(appInfo.getUser());
             edit.putLong(prefUserForApp(i), userSerialNumber);
         }
         // Start an asynchronous disk write.
         edit.apply();
     }

     /** Loads AppInfo from prefs. Returns null if something is wrong. */
     private AppInfo loadAppFromPrefs(int index) {
         String prefValue = mPrefs.getString(prefNameForApp(index), null);
         if (prefValue == null) {
             Slog.w(TAG, "Couldn't find pref " + prefNameForApp(index));
             return null;
         }
         ComponentName componentName = ComponentName.unflattenFromString(prefValue);
         if (componentName == null) {
             Slog.w(TAG, "Invalid component name " + prefValue);
             return null;
         }
         long userSerialNumber = mPrefs.getLong(prefUserForApp(index), -1);
         if (userSerialNumber == -1) {
             Slog.w(TAG, "Couldn't find pref " + prefUserForApp(index));
             return null;
         }
         UserHandle appUser = mUserManager.getUserForSerialNumber(userSerialNumber);
         if (appUser == null) {
             Slog.w(TAG, "No user for serial " + userSerialNumber);
             return null;
         }
         AppInfo appInfo = new AppInfo(componentName, appUser);
         if (resolveApp(appInfo) == null) {
             return null;
         }
         return appInfo;
     }

     /** Loads the list of apps from SharedPreferences. */
     private void loadAppsFromPrefs(int appCount) {
         for (int i = 0; i < appCount; i++) {
             AppInfo appInfo = loadAppFromPrefs(i);
             if (appInfo != null) {
                 mApps.add(appInfo);
             }
         }

         if (appCount != mApps.size()) savePrefs();
     }

     /** Adds the first few apps from the owner profile. Used for demo purposes. */
     private void addDefaultApps() {
         // Get a list of all app activities.
         final Intent queryIntent = new Intent(Intent.ACTION_MAIN, null);
         queryIntent.addCategory(Intent.CATEGORY_LAUNCHER);

         final List<ResolveInfo> apps = mContext.getPackageManager().queryIntentActivitiesAsUser(
                 queryIntent, 0 /* flags */, mCurrentUserId);
         final int appCount = apps.size();
         for (int i = 0; i < NUM_INITIAL_APPS && i < appCount; i++) {
             ResolveInfo ri = apps.get(i);
             ComponentName componentName = new ComponentName(
                     ri.activityInfo.packageName, ri.activityInfo.name);
             mApps.add(new AppInfo(componentName, new UserHandle(mCurrentUserId)));
         }

         savePrefs();
     }

     /** Returns a pref prefixed with the serial number of the current user. */
     private String userPrefixed(String pref) {
         return Long.toString(mCurrentUserSerialNumber) + USER_SEPARATOR + pref;
     }

     /** Returns the pref name for the app at a given index. */
     private String prefNameForApp(int index) {
         return userPrefixed(APP_PREF_PREFIX + Integer.toString(index));
     }

     /** Returns the pref name for the app's user at a given index. */
     private String prefUserForApp(int index) {
         return userPrefixed(APP_USER_PREFIX + Integer.toString(index));
     }

 }
	/*
	* Copyright (C) 2015 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 com.android.systemui.statusbar.phone;

	import android.app.AppGlobals;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.Intent;
	import android.content.SharedPreferences;
	import android.content.pm.ActivityInfo;
	import android.content.pm.IPackageManager;
	import android.content.pm.ResolveInfo;
	import android.content.pm.UserInfo;
	import android.os.RemoteException;
	import android.os.UserHandle;
	import android.os.UserManager;
	import android.util.Slog;

	import com.android.internal.annotations.VisibleForTesting;

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

	/**
	* Data model and controller for app icons appearing in the navigation bar. The data is stored on
	* disk in SharedPreferences. Each icon has a separate pref entry consisting of a flattened
	* ComponentName.
	*/
	class NavigationBarAppsModel {
	public interface OnAppsChangedListener {
	void onPinnedAppsChanged();
	}

	public class ResolvedApp {
	Intent launchIntent;
	ResolveInfo ri;
	}

	private final static String TAG = "NavigationBarAppsModel";

	// Default number of apps to load initially.
	private final static int NUM_INITIAL_APPS = 4;

	// Preferences file name.
	private final static String SHARED_PREFERENCES_NAME = "com.android.systemui.navbarapps";

	// Preference name for the version of the other preferences.
	private final static String VERSION_PREF = "version";

	// Current version number for preferences.
	private final static int CURRENT_VERSION = 3;

	// Preference name for the number of app icons.
	private final static String APP_COUNT_PREF = "app_count";

	// Preference name prefix for each app's info. The actual pref has an integer appended to it.
	private final static String APP_PREF_PREFIX = "app_";

	// User serial number prefix for each app's info. The actual pref has an integer appended to it.
	private final static String APP_USER_PREFIX = "app_user_";

	// Character separating current user serial number from the user-specific part of a pref.
	// Example "22\|app_user_2" - when logged as user with serial 22, we'll use this pref for the
	// user serial of the third app of the logged-in user.
	private final static char USER_SEPARATOR = '\|';

	private final Context mContext;
	private final UserManager mUserManager;
	private final SharedPreferences mPrefs;

	// Apps are represented as an ordered list of app infos.
	private List<AppInfo> mApps = new ArrayList<AppInfo>();

	private List<OnAppsChangedListener> mOnAppsChangedListeners =
	new ArrayList<OnAppsChangedListener>();

	// Id of the current user.
	private int mCurrentUserId = -1;

	// Serial number of the current user.
	private long mCurrentUserSerialNumber = -1;

	public NavigationBarAppsModel(Context context) {
	mContext = context;
	mPrefs = mContext.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
	mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);

	int version = mPrefs.getInt(VERSION_PREF, -1);
	if (version != CURRENT_VERSION) {
	// Since the data format changed, clean everything.
	SharedPreferences.Editor edit = mPrefs.edit();
	edit.clear();
	edit.putInt(VERSION_PREF, CURRENT_VERSION);
	edit.apply();
	}
	}

	@VisibleForTesting
	protected IPackageManager getPackageManager() {
	return AppGlobals.getPackageManager();
	}

	// Returns a resolved app info for a given app info, or null if the app info is unlauncheable.
	public ResolvedApp resolveApp(AppInfo appInfo) {
	ComponentName component = appInfo.getComponentName();
	int appUserId = appInfo.getUser().getIdentifier();

	if (mCurrentUserId != appUserId) {
	// Check if app user is a profile of current user and the app user is enabled.
	UserInfo appUserInfo = mUserManager.getUserInfo(appUserId);
	UserInfo currentUserInfo = mUserManager.getUserInfo(mCurrentUserId);
	if (appUserInfo == null \|\| currentUserInfo == null
	\|\| appUserInfo.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID
	\|\| appUserInfo.profileGroupId != currentUserInfo.profileGroupId
	\|\| !appUserInfo.isEnabled()) {
	Slog.e(TAG, "User " + appUserId +
	" is is not a profile of the current user, or is disabled.");
	return null;
	}
	}

	// This code is based on LauncherAppsService.startActivityAsUser code.
	Intent launchIntent = new Intent(Intent.ACTION_MAIN);
	launchIntent.addCategory(Intent.CATEGORY_LAUNCHER);
	launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
	launchIntent.setPackage(component.getPackageName());

	try {
	ActivityInfo info = getPackageManager().getActivityInfo(component, 0, appUserId);
	if (info == null) {
	Slog.e(TAG, "Activity " + component + " is not installed.");
	return null;
	}

	if (!info.exported) {
	Slog.e(TAG, "Activity " + component + " doesn't have 'exported' attribute.");
	return null;
	}
	} catch (RemoteException e) {
	Slog.e(TAG, "Failed to get activity info for " + component, e);
	return null;
	}

	// Check that the component actually has Intent.CATEGORY_LAUNCHER
	// as calling startActivityAsUser ignores the category and just
	// resolves based on the component if present.
	List<ResolveInfo> apps = mContext.getPackageManager().queryIntentActivitiesAsUser(launchIntent,
	0 /* flags */, appUserId);
	final int size = apps.size();
	for (int i = 0; i < size; ++i) {
	ResolveInfo ri = apps.get(i);
	ActivityInfo activityInfo = ri.activityInfo;
	if (activityInfo.packageName.equals(component.getPackageName()) &&
	activityInfo.name.equals(component.getClassName())) {
	// Found an activity with category launcher that matches
	// this component so ok to launch.
	launchIntent.setComponent(component);
	ResolvedApp resolvedApp = new ResolvedApp();
	resolvedApp.launchIntent = launchIntent;
	resolvedApp.ri = ri;
	return resolvedApp;
	}
	}

	Slog.e(TAG, "Activity doesn't have category Intent.CATEGORY_LAUNCHER " + component);
	return null;
	}

	public void addOnAppsChangedListener(OnAppsChangedListener listener) {
	mOnAppsChangedListeners.add(listener);
	}

	public void removeOnAppsChangedListener(OnAppsChangedListener listener) {
	mOnAppsChangedListeners.remove(listener);
	}

	/**
	* Reinitializes the model for a new user.
	*/
	public void setCurrentUser(int userId) {
	mCurrentUserId = userId;
	mCurrentUserSerialNumber = mUserManager.getSerialNumberForUser(new UserHandle(userId));

	mApps.clear();

	int appCount = mPrefs.getInt(userPrefixed(APP_COUNT_PREF), -1);
	if (appCount >= 0) {
	loadAppsFromPrefs(appCount);
	} else {
	// We switched to this user for the first time ever. This is a good opportunity to clean
	// prefs for users deleted in the past.
	removePrefsForDeletedUsers();

	addDefaultApps();
	}
	}

	/**
	* Removes prefs for users that don't exist on the device.
	*/
	private void removePrefsForDeletedUsers() {
	// Build a set of string representations of serial numbers of the device users.
	final List<UserInfo> users = mUserManager.getUsers();
	final int userCount = users.size();

	final Set<String> userSerials = new HashSet<String> ();

	for (int i = 0; i < userCount; ++i) {
	userSerials.add(Long.toString(users.get(i).serialNumber));
	}

	// Walk though all prefs and delete ones which user is not in the string set.
	final Map<String, ?> allPrefs = mPrefs.getAll();
	final SharedPreferences.Editor edit = mPrefs.edit();

	for (Map.Entry<String, ?> pref : allPrefs.entrySet()) {
	final String key = pref.getKey();
	if (key.equals(VERSION_PREF)) continue;

	final int userSeparatorPos = key.indexOf(USER_SEPARATOR);

	if (userSeparatorPos < 0) {
	// Removing anomalous pref with no user.
	edit.remove(key);
	continue;
	}

	final String prefUserSerial = key.substring(0, userSeparatorPos);

	if (!userSerials.contains(prefUserSerial)) {
	// Removes pref for a not existing user.
	edit.remove(key);
	continue;
	}
	}

	edit.apply();
	}

	/** Returns the list of apps. */
	public List<AppInfo> getApps() {
	return mApps;
	}

	/** Sets the list of apps and saves it. */
	public void setApps(List<AppInfo> apps) {
	mApps = apps;
	savePrefs();

	int size = mOnAppsChangedListeners.size();
	for (int i = 0; i < size; ++i) {
	mOnAppsChangedListeners.get(i).onPinnedAppsChanged();
	}
	}

	/** Saves the current model to disk. */
	private void savePrefs() {
	SharedPreferences.Editor edit = mPrefs.edit();
	int appCount = mApps.size();
	edit.putInt(userPrefixed(APP_COUNT_PREF), appCount);
	for (int i = 0; i < appCount; i++) {
	final AppInfo appInfo = mApps.get(i);
	String componentNameString = appInfo.getComponentName().flattenToString();
	edit.putString(prefNameForApp(i), componentNameString);
	long userSerialNumber = mUserManager.getSerialNumberForUser(appInfo.getUser());
	edit.putLong(prefUserForApp(i), userSerialNumber);
	}
	// Start an asynchronous disk write.
	edit.apply();
	}

	/** Loads AppInfo from prefs. Returns null if something is wrong. */
	private AppInfo loadAppFromPrefs(int index) {
	String prefValue = mPrefs.getString(prefNameForApp(index), null);
	if (prefValue == null) {
	Slog.w(TAG, "Couldn't find pref " + prefNameForApp(index));
	return null;
	}
	ComponentName componentName = ComponentName.unflattenFromString(prefValue);
	if (componentName == null) {
	Slog.w(TAG, "Invalid component name " + prefValue);
	return null;
	}
	long userSerialNumber = mPrefs.getLong(prefUserForApp(index), -1);
	if (userSerialNumber == -1) {
	Slog.w(TAG, "Couldn't find pref " + prefUserForApp(index));
	return null;
	}
	UserHandle appUser = mUserManager.getUserForSerialNumber(userSerialNumber);
	if (appUser == null) {
	Slog.w(TAG, "No user for serial " + userSerialNumber);
	return null;
	}
	AppInfo appInfo = new AppInfo(componentName, appUser);
	if (resolveApp(appInfo) == null) {
	return null;
	}
	return appInfo;
	}

	/** Loads the list of apps from SharedPreferences. */
	private void loadAppsFromPrefs(int appCount) {
	for (int i = 0; i < appCount; i++) {
	AppInfo appInfo = loadAppFromPrefs(i);
	if (appInfo != null) {
	mApps.add(appInfo);
	}
	}

	if (appCount != mApps.size()) savePrefs();
	}

	/** Adds the first few apps from the owner profile. Used for demo purposes. */
	private void addDefaultApps() {
	// Get a list of all app activities.
	final Intent queryIntent = new Intent(Intent.ACTION_MAIN, null);
	queryIntent.addCategory(Intent.CATEGORY_LAUNCHER);

	final List<ResolveInfo> apps = mContext.getPackageManager().queryIntentActivitiesAsUser(
	queryIntent, 0 /* flags */, mCurrentUserId);
	final int appCount = apps.size();
	for (int i = 0; i < NUM_INITIAL_APPS && i < appCount; i++) {
	ResolveInfo ri = apps.get(i);
	ComponentName componentName = new ComponentName(
	ri.activityInfo.packageName, ri.activityInfo.name);
	mApps.add(new AppInfo(componentName, new UserHandle(mCurrentUserId)));
	}

	savePrefs();
	}

	/** Returns a pref prefixed with the serial number of the current user. */
	private String userPrefixed(String pref) {
	return Long.toString(mCurrentUserSerialNumber) + USER_SEPARATOR + pref;
	}

	/** Returns the pref name for the app at a given index. */
	private String prefNameForApp(int index) {
	return userPrefixed(APP_PREF_PREFIX + Integer.toString(index));
	}

	/** Returns the pref name for the app's user at a given index. */
	private String prefUserForApp(int index) {
	return userPrefixed(APP_USER_PREFIX + Integer.toString(index));
	}

	}