User management screens

Customized Settings for restricted users
- Only some top-level settings panels available

User management
- Primary user can add and remove users
- User details screen to change name and list of enabled apps

Change-Id: Ia6beb991b427197a4ec2724ca3c9222073f6cf7d

proguard.flags

@@ -11,6 +11,7 @@
 -keep class com.android.settings.MasterClearConfirm
 -keep class com.android.settings.accounts.*
 -keep class com.android.settings.fuelgauge.*
+-keep class com.android.settings.users.*
 
 # Keep click responders
 -keepclassmembers class com.android.settings.inputmethod.UserDictionaryAddWordActivity {

res/values/arrays.xml

@@ -724,4 +724,22 @@
         <!-- Status message when VPN is failed. -->
         <item>Unsuccessful</item>
     </string-array>
+
+    <!-- User content ratings for restricted users [CHAR LIMIT=30] -->
+    <string-array name="user_content_ratings_entries">
+        <item>Ascended being</item>
+        <item>Human</item>
+        <item>Neanderthal</item>
+        <item>Chimp</item>
+        <item>Monkey</item>
+    </string-array>
+
+    <!-- Values for user content ratings for restricted users -->
+    <string-array name="user_content_ratings_values" translatable="false">
+        <item>5</item>
+        <item>4</item>
+        <item>3</item>
+        <item>2</item>
+        <item>1</item>
+    </string-array>
 </resources>

res/values/bools.xml

@@ -29,4 +29,7 @@
     <!-- Whether the bluetooth activation confirmation dialogs should be auto dismissed.
          Can be overridden for specific product builds. -->
     <bool name="auto_confirm_bluetooth_activation_dialog">false</bool>
+
+    <!-- Whether User management screen is available -->
+    <bool name="enable_user_management">false</bool>
 </resources>

res/values/strings.xml

@@ -3854,4 +3854,43 @@
     "system_update_settings_list_item_title" in this project. [CHAR LIMIT=25] -->
     <string name="additional_system_update_settings_list_item_title">Additional system updates</string>
 
+    <!-- User settings -->
+    <skip/>
+
+    <!-- User settings screen title [CHAR LIMIT=25] -->
+    <string name="user_settings_title">Users &amp; restrictions</string>
+    <!-- User settings user list section header [CHAR LIMIT=30] -->
+    <string name="user_list_title">Users</string>
+    <!-- User settings add user menu [CHAR LIMIT=20] -->
+    <string name="user_add_user_menu">Add user</string>
+
+    <!-- User details -->
+    <skip/>
+
+    <!-- User details screen title [CHAR LIMIT=25] -->
+    <string name="user_details_title">Edit details</string>
+    <!-- User information section title [CHAR LIMIT=30] -->
+    <string name="user_information_heading">User information</string>
+    <!-- User name title [CHAR LIMIT=25] -->
+    <string name="user_name_title">Name</string>
+    <!-- User restrictions section title [CHAR LIMIT=30] -->
+    <string name="user_restrictions_heading">Content restrictions</string>
+    <!-- User restrictions, does market require PIN protection [CHAR LIMIT=25] -->
+    <string name="user_market_requires_pin">Downloads require PIN</string>
+    <!-- User restrictions, maximum content rating for apps [CHAR LIMIT=25] -->
+    <string name="user_max_content_rating">Content rating</string>
+    <!-- Section title for list of system apps [CHAR LIMIT=30] -->
+    <string name="user_system_apps_heading">System apps to enable</string>
+    <!-- Section title for list of downloaded apps [CHAR LIMIT=30] -->
+    <string name="user_market_apps_heading">Installed apps to enable</string>
+    <!-- User details discard user menu [CHAR LIMIT=20] -->
+    <string name="user_discard_user_menu">Discard</string>
+    <!-- User details remove user menu [CHAR LIMIT=20] -->
+    <string name="user_remove_user_menu">Remove user</string>
+    <!-- User details new user name [CHAR LIMIT=30] -->
+    <string name="user_new_user_name">Pesky kid</string>
+    <!-- User removal confirmation title [CHAR LIMIT=25] -->
+    <string name="user_confirm_remove_title">Remove user?</string>
+    <!-- User removal confirmation message [CHAR LIMIT=none] -->
+    <string name="user_confirm_remove_message">Are you sure you want to remove the user and all associated data from the device?</string>
 </resources>

res/xml/settings_headers.xml

@@ -106,6 +106,13 @@
     <!-- PERSONAL -->
     <header android:title="@string/header_category_personal" />
 
+    <!-- Manage users -->
+    <header
+        android:fragment="com.android.settings.users.UserSettings"
+        android:icon="@drawable/ic_settings_sync"
+        android:title="@string/user_settings_title"
+        android:id="@+id/user_settings" />
+
     <!-- Data Sync. The settings activity will ensure this is resolved to an
          activity on the system image, otherwise it will remove this
          preference. -->

res/xml/user_details.xml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2012 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.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"
+        android:title="@string/user_details_title">
+
+    <PreferenceCategory
+            android:key="information_category"
+            android:title="@string/user_information_heading">
+        <EditTextPreference
+                android:key="user_name"
+                android:title="@string/user_name_title"
+                android:persistent="false"
+                />
+    </PreferenceCategory>
+
+    <PreferenceCategory
+            android:key="restrictions_category"
+            android:title="@string/user_restrictions_heading">
+        <CheckBoxPreference
+                android:key="market_requires_pin"
+                android:title="@string/user_market_requires_pin"
+                android:persistent="false"
+                android:enabled="false"
+                />
+        <ListPreference
+                android:key="content_rating"
+                android:title="@string/user_max_content_rating"
+                android:entries="@array/user_content_ratings_entries"
+                android:entryValues="@array/user_content_ratings_values"
+                android:persistent="false"
+                android:enabled="false"
+                />
+    </PreferenceCategory>
+
+    <PreferenceCategory
+            android:key="system_apps_category"
+            android:title="@string/user_system_apps_heading">
+        <!-- Dynamically added content -->
+    </PreferenceCategory>
+
+    <PreferenceCategory
+            android:key="market_apps_category"
+            android:title="@string/user_market_apps_heading">
+        <!-- Dynamically added content -->
+    </PreferenceCategory>
+
+</PreferenceScreen>

res/xml/user_settings.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2012 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.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"
+        android:title="@string/user_settings_title">
+
+    <PreferenceCategory
+            android:key="user_list"
+            android:title="@string/user_list_title">
+    </PreferenceCategory>
+
+</PreferenceScreen>

src/com/android/settings/SecuritySettings.java

@@ -26,6 +26,7 @@ import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.UserId;
 import android.os.Vibrator;
 import android.preference.CheckBoxPreference;
 import android.preference.ListPreference;
@@ -140,6 +141,7 @@ public class SecuritySettings extends SettingsPreferenceFragment
         DevicePolicyManager dpm =
                 (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
 
+        if (UserId.myUserId() == 0) {
             switch (dpm.getStorageEncryptionStatus()) {
             case DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE:
                 // The device is currently encrypted.
@@ -150,6 +152,7 @@ public class SecuritySettings extends SettingsPreferenceFragment
                 addPreferencesFromResource(R.xml.security_settings_unencrypted);
                 break;
             }
+        }
 
         // lock after preference
         mLockAfter = (ListPreference) root.findPreference(KEY_LOCK_AFTER_TIMEOUT);
@@ -190,6 +193,11 @@ public class SecuritySettings extends SettingsPreferenceFragment
             }
         }
 
+        if (UserId.myUserId() > 0) {
+            return root;
+        }
+        // Rest are for primary user...
+
         // Append the rest of the settings
         addPreferencesFromResource(R.xml.security_settings_misc);
 
@@ -246,9 +254,11 @@ public class SecuritySettings extends SettingsPreferenceFragment
     public void onClick(DialogInterface dialog, int which) {
         if (dialog == mWarnInstallApps && which == DialogInterface.BUTTON_POSITIVE) {
             setNonMarketAppsAllowed(true);
+            if (mToggleAppInstallation != null) {
                 mToggleAppInstallation.setChecked(true);
             }
         }
+    }
 
     @Override
     public void onDestroy() {
@@ -343,12 +353,16 @@ public class SecuritySettings extends SettingsPreferenceFragment
             mPowerButtonInstantlyLocks.setChecked(lockPatternUtils.getPowerButtonInstantlyLocks());
         }
 
+        if (mShowPassword != null) {
             mShowPassword.setChecked(Settings.System.getInt(getContentResolver(),
                     Settings.System.TEXT_SHOW_PASSWORD, 1) != 0);
+        }
 
         KeyStore.State state = KeyStore.getInstance().state();
+        if (mResetCredentials != null) {
             mResetCredentials.setEnabled(state != KeyStore.State.UNINITIALIZED);
         }
+    }
 
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {

src/com/android/settings/Settings.java

@@ -16,6 +16,7 @@
 
 package com.android.settings;
 
+import com.android.internal.util.ArrayUtils;
 import com.android.settings.accounts.AccountSyncSettings;
 import com.android.settings.bluetooth.BluetoothEnabler;
 import com.android.settings.deviceinfo.Memory;
@@ -29,6 +30,7 @@ import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.os.Bundle;
+import android.os.UserId;
 import android.preference.Preference;
 import android.preference.PreferenceActivity;
 import android.preference.PreferenceFragment;
@@ -76,6 +78,17 @@ public class Settings extends PreferenceActivity implements ButtonBarHandler {
     private Header mParentHeader;
     private boolean mInLocalHeaderSwitch;
 
+    // Show only these settings for restricted users
+    private int[] SETTINGS_FOR_RESTRICTED = {
+            R.id.wifi_settings,
+            R.id.bluetooth_settings,
+            R.id.sound_settings,
+            R.id.display_settings,
+            //R.id.security_settings,
+            R.id.sync_settings,
+            R.id.about_settings
+    };
+
     // TODO: Update Call Settings based on airplane mode state.
 
     protected HashMap<Integer, Integer> mHeaderIndexMap = new HashMap<Integer, Integer>();
@@ -337,6 +350,16 @@ public class Settings extends PreferenceActivity implements ButtonBarHandler {
                 if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)) {
                     target.remove(header);
                 }
+            } else if (id == R.id.user_settings) {
+                if (!UserId.MU_ENABLED || UserId.myUserId() != 0
+                        || !getResources().getBoolean(R.bool.enable_user_management)
+                        || Utils.isMonkeyRunning()) {
+                    target.remove(header);
+                }
+            }
+            if (UserId.MU_ENABLED && UserId.myUserId() != 0
+                    && !ArrayUtils.contains(SETTINGS_FOR_RESTRICTED, id)) {
+                target.remove(header);
             }
 
             // Increment if the current one wasn't removed by the Utils code.

src/com/android/settings/users/UserDetailsSettings.java

@@ -0,0 +1,285 @@
+/*
+ * Copyright (C) 2012 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.settings.users;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.IPackageManager;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.pm.UserInfo;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.os.SystemProperties;
+import android.preference.CheckBoxPreference;
+import android.preference.EditTextPreference;
+import android.preference.Preference;
+import android.preference.PreferenceGroup;
+import android.text.TextUtils;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+
+import com.android.settings.DialogCreatable;
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+
+import java.util.HashMap;
+import java.util.List;
+
+public class UserDetailsSettings extends SettingsPreferenceFragment
+        implements Preference.OnPreferenceChangeListener, DialogCreatable {
+
+    private static final String TAG = "UserDetailsSettings";
+
+    private static final int MENU_REMOVE_USER = Menu.FIRST;
+    private static final int DIALOG_CONFIRM_REMOVE = 1;
+
+    private static final String KEY_USER_NAME = "user_name";
+    private static final String KEY_INSTALLED_APPS = "market_apps_category";
+    private static final String KEY_SYSTEM_APPS = "system_apps_category";
+    public static final String EXTRA_USER_ID = "user_id";
+
+    private static final String[] SYSTEM_APPS = {
+            "com.google.android.browser",
+            "com.google.android.gm",
+            "com.google.android.youtube"
+    };
+
+    static class AppState {
+        boolean dirty;
+        boolean enabled;
+
+        AppState(boolean enabled) {
+            this.enabled = enabled;
+        }
+    }
+
+    private HashMap<String, AppState> mAppStates = new HashMap<String, AppState>();
+    private PreferenceGroup mSystemAppGroup;
+    private PreferenceGroup mInstalledAppGroup;
+    private EditTextPreference mNamePref;
+
+    private IPackageManager mIPm;
+    private PackageManager mPm;
+    private int mUserId;
+    private boolean mNewUser;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.user_details);
+        Bundle args = getArguments();
+        mNewUser = args == null || args.getInt(EXTRA_USER_ID, -1) == -1;
+        mUserId = mNewUser ? -1 : args.getInt(EXTRA_USER_ID, -1);
+        mIPm = IPackageManager.Stub.asInterface(ServiceManager.getService("package"));
+
+        if (mUserId == -1) {
+            try {
+                mUserId = mIPm.createUser(getString(R.string.user_new_user_name), 0).id;
+            } catch (RemoteException re) {
+            }
+        }
+        mSystemAppGroup = (PreferenceGroup) findPreference(KEY_SYSTEM_APPS);
+        mInstalledAppGroup = (PreferenceGroup) findPreference(KEY_INSTALLED_APPS);
+        mNamePref = (EditTextPreference) findPreference(KEY_USER_NAME);
+        mNamePref.setOnPreferenceChangeListener(this);
+
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        mPm = getActivity().getPackageManager();
+        if (mUserId > 0) {
+            initExistingUser();
+        } else {
+            initNewUser();
+        }
+        refreshApps();
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        MenuItem addAccountItem = menu.add(0, MENU_REMOVE_USER, 0,
+                mNewUser ? R.string.user_discard_user_menu : R.string.user_remove_user_menu);
+        addAccountItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM
+                | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        final int itemId = item.getItemId();
+        if (itemId == MENU_REMOVE_USER) {
+            onRemoveUserClicked();
+            return true;
+        } else {
+            return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void initExistingUser() {
+        List<UserInfo> users = mPm.getUsers();
+        UserInfo foundUser = null;
+        for (UserInfo user : users) {
+            if (user.id == mUserId) {
+                foundUser = user;
+                break;
+            }
+        }
+        if (foundUser != null) {
+            mNamePref.setSummary(foundUser.name);
+            mNamePref.setText(foundUser.name);
+        }
+    }
+
+    private void initNewUser() {
+        // TODO: Check if there's already a "New user" and localize
+        mNamePref.setText(getString(R.string.user_new_user_name));
+        mNamePref.setSummary(getString(R.string.user_new_user_name));
+    }
+
+    private void onRemoveUserClicked() {
+        if (mNewUser) {
+            removeUserNow();
+        } else {
+            showDialog(DIALOG_CONFIRM_REMOVE);
+        }
+    }
+
+    private void removeUserNow() {
+        try {
+            mIPm.removeUser(mUserId);
+        } catch (RemoteException re) {
+            // Couldn't remove user. Shouldn't happen
+            Log.e(TAG, "Couldn't remove user " + mUserId + "\n" + re);
+        }
+        finish();
+    }
+
+    private void insertAppInfo(PreferenceGroup group, HashMap<String, AppState> appStateMap,
+            PackageInfo info, boolean defaultState) {
+        if (info != null) {
+            String pkgName = info.packageName;
+            String name = info.applicationInfo.loadLabel(mPm).toString();
+            Drawable icon = info.applicationInfo.loadIcon(mPm);
+            AppState appState = appStateMap.get(info.packageName);
+            boolean enabled = appState == null ? defaultState : appState.enabled;
+            CheckBoxPreference appPref = new CheckBoxPreference(getActivity());
+            appPref.setTitle(name != null ? name : pkgName);
+            appPref.setIcon(icon);
+            appPref.setChecked(enabled);
+            appPref.setKey(pkgName);
+            appPref.setPersistent(false);
+            appPref.setOnPreferenceChangeListener(this);
+            group.addPreference(appPref);
+        }
+    }
+
+    private void refreshApps() {
+        mSystemAppGroup.removeAll();
+        mInstalledAppGroup.removeAll();
+
+        boolean firstTime = mAppStates.isEmpty();
+
+        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
+        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
+        List<ResolveInfo> apps = mPm.queryIntentActivities(mainIntent, 0);
+
+        for (ResolveInfo resolveInfo : apps) {
+            PackageInfo info;
+            try {
+                info = mIPm.getPackageInfo(resolveInfo.activityInfo.packageName,
+                        0 /* flags */,
+                    mUserId < 0 ? 0 : mUserId);
+            } catch (RemoteException re) {
+                continue;
+            }
+            if (firstTime) {
+                mAppStates.put(resolveInfo.activityInfo.packageName,
+                        new AppState(info.applicationInfo.enabled));
+            }
+            if ((info.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
+                if (mSystemAppGroup.findPreference(info.packageName) != null) {
+                    continue;
+                }
+                insertAppInfo(mSystemAppGroup, mAppStates, info, false);
+            } else {
+                if (mInstalledAppGroup.findPreference(info.packageName) != null) {
+                    continue;
+                }
+                insertAppInfo(mInstalledAppGroup, mAppStates, info, false);
+            }
+        }
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (preference instanceof CheckBoxPreference) {
+            String packageName = preference.getKey();
+            int newState = ((Boolean) newValue) ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
+                    : PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER;
+            try {
+                mIPm.setApplicationEnabledSetting(packageName, newState, 0, mUserId);
+            } catch (RemoteException re) {
+                Log.e(TAG, "Unable to change enabled state of package " + packageName
+                        + " for user " + mUserId);
+            }
+        } else if (preference == mNamePref) {
+            String name = (String) newValue;
+            if (TextUtils.isEmpty(name)) {
+                return false;
+            }
+            try {
+                mIPm.updateUserName(mUserId, (String) newValue);
+                mNamePref.setSummary((String) newValue);
+            } catch (RemoteException re) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public Dialog onCreateDialog(int dialogId) {
+        switch (dialogId) {
+            case DIALOG_CONFIRM_REMOVE:
+                return new AlertDialog.Builder(getActivity())
+                    .setTitle(R.string.user_confirm_remove_title)
+                    .setMessage(R.string.user_confirm_remove_message)
+                    .setPositiveButton(android.R.string.ok,
+                        new DialogInterface.OnClickListener() {
+                            public void onClick(DialogInterface dialog, int which) {
+                                removeUserNow();
+                            }
+                    })
+                    .setNegativeButton(android.R.string.cancel, null)
+                    .create();
+            default:
+                return null;
+        }
+    }
+}

src/com/android/settings/users/UserSettings.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2012 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.settings.users;
+
+import android.content.pm.UserInfo;
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.Preference.OnPreferenceClickListener;
+import android.preference.PreferenceActivity;
+import android.preference.PreferenceGroup;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+
+import java.util.List;
+
+public class UserSettings extends SettingsPreferenceFragment
+        implements OnPreferenceClickListener {
+
+    private static final String KEY_USER_LIST = "user_list";
+    private static final int MENU_ADD_USER = Menu.FIRST;
+
+    private PreferenceGroup mUserListCategory;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.user_settings);
+        mUserListCategory = (PreferenceGroup) findPreference(KEY_USER_LIST);
+
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        updateUserList();
+    }
+
+    @Override
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        MenuItem addAccountItem = menu.add(0, MENU_ADD_USER, 0, R.string.user_add_user_menu);
+        addAccountItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM
+                | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        final int itemId = item.getItemId();
+        if (itemId == MENU_ADD_USER) {
+            onAddUserClicked();
+            return true;
+        } else {
+            return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void onAddUserClicked() {
+        ((PreferenceActivity) getActivity()).startPreferencePanel(
+                UserDetailsSettings.class.getName(), null, R.string.user_details_title,
+                null, this, 0);
+    }
+
+    private void updateUserList() {
+        List<UserInfo> users = getActivity().getPackageManager().getUsers();
+
+        mUserListCategory.removeAll();
+        for (UserInfo user : users) {
+            if (user.id == 0) continue;
+            Preference pref = new Preference(getActivity());
+            pref.setTitle(user.name);
+            pref.setOnPreferenceClickListener(this);
+            pref.setKey("id=" + user.id);
+            mUserListCategory.addPreference(pref);
+        }
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference pref) {
+        String sid = pref.getKey();
+        if (sid != null && sid.startsWith("id=")) {
+            int id = Integer.parseInt(sid.substring(3));
+            Bundle args = new Bundle();
+            args.putInt(UserDetailsSettings.EXTRA_USER_ID, id);
+            ((PreferenceActivity) getActivity()).startPreferencePanel(
+                    UserDetailsSettings.class.getName(),
+                    args, 0, pref.getTitle(), this, 0);
+            return true;
+        }
+        return false;
+    }
+}