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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings;
     18 
     19 import android.app.backup.IBackupManager;
     20 import android.content.ContentResolver;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.pm.PackageManager;
     24 import android.content.pm.ResolveInfo;
     25 import android.os.Bundle;
     26 import android.os.RemoteException;
     27 import android.os.ServiceManager;
     28 import android.os.UserHandle;
     29 import android.os.UserManager;
     30 import android.provider.SearchIndexableResource;
     31 import android.provider.Settings;
     32 import android.support.annotation.VisibleForTesting;
     33 import android.support.v14.preference.SwitchPreference;
     34 import android.support.v7.preference.Preference;
     35 import android.support.v7.preference.Preference.OnPreferenceChangeListener;
     36 import android.support.v7.preference.PreferenceScreen;
     37 import android.util.Log;
     38 
     39 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
     40 import com.android.settings.search.BaseSearchIndexProvider;
     41 import com.android.settings.search.Indexable;
     42 import com.android.settingslib.RestrictedLockUtils;
     43 
     44 import java.util.ArrayList;
     45 import java.util.Collection;
     46 import java.util.HashSet;
     47 import java.util.List;
     48 import java.util.Set;
     49 
     50 /**
     51  * Gesture lock pattern settings.
     52  */
     53 public class PrivacySettings extends SettingsPreferenceFragment {
     54 
     55     // Vendor specific
     56     private static final String GSETTINGS_PROVIDER = "com.google.settings";
     57     @VisibleForTesting
     58     static final String BACKUP_DATA = "backup_data";
     59     @VisibleForTesting
     60     static final String AUTO_RESTORE = "auto_restore";
     61     @VisibleForTesting
     62     static final String CONFIGURE_ACCOUNT = "configure_account";
     63     @VisibleForTesting
     64     static final String DATA_MANAGEMENT = "data_management";
     65     private static final String BACKUP_INACTIVE = "backup_inactive";
     66     private static final String TAG = "PrivacySettings";
     67     private IBackupManager mBackupManager;
     68     private Preference mBackup;
     69     private SwitchPreference mAutoRestore;
     70     private Preference mConfigure;
     71     private Preference mManageData;
     72     private boolean mEnabled;
     73 
     74     @Override
     75     public int getMetricsCategory() {
     76         return MetricsEvent.PRIVACY;
     77     }
     78 
     79     @Override
     80     public void onCreate(Bundle savedInstanceState) {
     81         super.onCreate(savedInstanceState);
     82         // Don't allow any access if this is not an admin user.
     83         // TODO: backup/restore currently only works with owner user b/22760572
     84         mEnabled = UserManager.get(getActivity()).isAdminUser();
     85         if (!mEnabled) {
     86             return;
     87         }
     88 
     89         addPreferencesFromResource(R.xml.privacy_settings);
     90         final PreferenceScreen screen = getPreferenceScreen();
     91         mBackupManager = IBackupManager.Stub.asInterface(
     92                 ServiceManager.getService(Context.BACKUP_SERVICE));
     93 
     94         setPreferenceReferences(screen);
     95 
     96         Set<String> keysToRemove = new HashSet<>();
     97         getNonVisibleKeys(getActivity(), keysToRemove);
     98         final int screenPreferenceCount = screen.getPreferenceCount();
     99         for (int i = screenPreferenceCount - 1; i >= 0; --i) {
    100             Preference preference = screen.getPreference(i);
    101             if (keysToRemove.contains(preference.getKey())) {
    102                 screen.removePreference(preference);
    103             }
    104         }
    105 
    106         updateToggles();
    107     }
    108 
    109     @Override
    110     public void onResume() {
    111         super.onResume();
    112 
    113         // Refresh UI
    114         if (mEnabled) {
    115             updateToggles();
    116         }
    117     }
    118 
    119     @VisibleForTesting
    120     void setPreferenceReferences(PreferenceScreen screen) {
    121         mBackup = screen.findPreference(BACKUP_DATA);
    122 
    123         mAutoRestore = (SwitchPreference) screen.findPreference(AUTO_RESTORE);
    124         mAutoRestore.setOnPreferenceChangeListener(preferenceChangeListener);
    125 
    126         mConfigure = screen.findPreference(CONFIGURE_ACCOUNT);
    127         mManageData = screen.findPreference(DATA_MANAGEMENT);
    128     }
    129 
    130     private OnPreferenceChangeListener preferenceChangeListener = new OnPreferenceChangeListener() {
    131         @Override
    132         public boolean onPreferenceChange(Preference preference, Object newValue) {
    133             if (!(preference instanceof SwitchPreference)) {
    134                 return true;
    135             }
    136             boolean nextValue = (Boolean) newValue;
    137             boolean result = false;
    138             if (preference == mAutoRestore) {
    139                 try {
    140                     mBackupManager.setAutoRestore(nextValue);
    141                     result = true;
    142                 } catch (RemoteException e) {
    143                     mAutoRestore.setChecked(!nextValue);
    144                 }
    145             }
    146             return result;
    147         }
    148     };
    149 
    150 
    151     /*
    152      * Creates toggles for each backup/reset preference.
    153      */
    154     private void updateToggles() {
    155         ContentResolver res = getContentResolver();
    156 
    157         boolean backupEnabled = false;
    158         Intent configIntent = null;
    159         String configSummary = null;
    160         Intent manageIntent = null;
    161         String manageLabel = null;
    162         try {
    163             backupEnabled = mBackupManager.isBackupEnabled();
    164             String transport = mBackupManager.getCurrentTransport();
    165             configIntent = validatedActivityIntent(
    166                     mBackupManager.getConfigurationIntent(transport), "config");
    167             configSummary = mBackupManager.getDestinationString(transport);
    168             manageIntent = validatedActivityIntent(
    169                     mBackupManager.getDataManagementIntent(transport), "management");
    170             manageLabel = mBackupManager.getDataManagementLabel(transport);
    171 
    172             mBackup.setSummary(backupEnabled
    173                     ? R.string.accessibility_feature_state_on
    174                     : R.string.accessibility_feature_state_off);
    175         } catch (RemoteException e) {
    176             // leave it 'false' and disable the UI; there's no backup manager
    177             mBackup.setEnabled(false);
    178         }
    179 
    180         mAutoRestore.setChecked(Settings.Secure.getInt(res,
    181                 Settings.Secure.BACKUP_AUTO_RESTORE, 1) == 1);
    182         mAutoRestore.setEnabled(backupEnabled);
    183 
    184         final boolean configureEnabled = (configIntent != null) && backupEnabled;
    185         mConfigure.setEnabled(configureEnabled);
    186         mConfigure.setIntent(configIntent);
    187         setConfigureSummary(configSummary);
    188 
    189         final boolean manageEnabled = (manageIntent != null) && backupEnabled;
    190         if (manageEnabled) {
    191             mManageData.setIntent(manageIntent);
    192             if (manageLabel != null) {
    193                 mManageData.setTitle(manageLabel);
    194             }
    195         } else {
    196             // Hide the item if data management intent is not supported by transport.
    197             getPreferenceScreen().removePreference(mManageData);
    198         }
    199     }
    200 
    201     private Intent validatedActivityIntent(Intent intent, String logLabel) {
    202         if (intent != null) {
    203             PackageManager pm = getPackageManager();
    204             List<ResolveInfo> resolved = pm.queryIntentActivities(intent, 0);
    205             if (resolved == null || resolved.isEmpty()) {
    206                 intent = null;
    207                 Log.e(TAG, "Backup " + logLabel + " intent " + intent
    208                         + " fails to resolve; ignoring");
    209             }
    210         }
    211         return intent;
    212     }
    213 
    214     private void setConfigureSummary(String summary) {
    215         if (summary != null) {
    216             mConfigure.setSummary(summary);
    217         } else {
    218             mConfigure.setSummary(R.string.backup_configure_account_default_summary);
    219         }
    220     }
    221 
    222     @Override
    223     public int getHelpResource() {
    224         return R.string.help_url_backup_reset;
    225     }
    226 
    227     private static void getNonVisibleKeys(Context context, Collection<String> nonVisibleKeys) {
    228         final IBackupManager backupManager = IBackupManager.Stub.asInterface(
    229                 ServiceManager.getService(Context.BACKUP_SERVICE));
    230         boolean isServiceActive = false;
    231         try {
    232             isServiceActive = backupManager.isBackupServiceActive(UserHandle.myUserId());
    233         } catch (RemoteException e) {
    234             Log.w(TAG, "Failed querying backup manager service activity status. " +
    235                     "Assuming it is inactive.");
    236         }
    237         boolean vendorSpecific = context.getPackageManager().
    238                 resolveContentProvider(GSETTINGS_PROVIDER, 0) == null;
    239         if (vendorSpecific || isServiceActive) {
    240             nonVisibleKeys.add(BACKUP_INACTIVE);
    241         }
    242         if (vendorSpecific || !isServiceActive) {
    243             nonVisibleKeys.add(BACKUP_DATA);
    244             nonVisibleKeys.add(AUTO_RESTORE);
    245             nonVisibleKeys.add(CONFIGURE_ACCOUNT);
    246         }
    247     }
    248 }
    249