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      1 /*
      2  * Copyright (C) 2015 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.server.backup;
     18 
     19 import android.app.AppGlobals;
     20 import android.app.backup.BlobBackupHelper;
     21 import android.content.pm.IPackageManager;
     22 import android.os.UserHandle;
     23 import android.util.Slog;
     24 
     25 public class PreferredActivityBackupHelper extends BlobBackupHelper {
     26     private static final String TAG = "PreferredBackup";
     27     private static final boolean DEBUG = false;
     28 
     29     // current schema of the backup state blob
     30     private static final int STATE_VERSION = 3;
     31 
     32     // key under which the preferred-activity state blob is committed to backup
     33     private static final String KEY_PREFERRED = "preferred-activity";
     34 
     35     // key for default-browser [etc] state
     36     private static final String KEY_DEFAULT_APPS = "default-apps";
     37 
     38     // intent-filter verification state
     39     private static final String KEY_INTENT_VERIFICATION = "intent-verification";
     40 
     41     public PreferredActivityBackupHelper() {
     42         super(STATE_VERSION,
     43                 KEY_PREFERRED,
     44                 KEY_DEFAULT_APPS,
     45                 KEY_INTENT_VERIFICATION);
     46     }
     47 
     48     @Override
     49     protected byte[] getBackupPayload(String key) {
     50         IPackageManager pm = AppGlobals.getPackageManager();
     51         if (DEBUG) {
     52             Slog.d(TAG, "Handling backup of " + key);
     53         }
     54         try {
     55             // TODO: http://b/22388012
     56             switch (key) {
     57                 case KEY_PREFERRED:
     58                     return pm.getPreferredActivityBackup(UserHandle.USER_SYSTEM);
     59                 case KEY_DEFAULT_APPS:
     60                     return pm.getDefaultAppsBackup(UserHandle.USER_SYSTEM);
     61                 case KEY_INTENT_VERIFICATION:
     62                     return pm.getIntentFilterVerificationBackup(UserHandle.USER_SYSTEM);
     63                 default:
     64                     Slog.w(TAG, "Unexpected backup key " + key);
     65             }
     66         } catch (Exception e) {
     67             Slog.e(TAG, "Unable to store payload " + key);
     68         }
     69         return null;
     70     }
     71 
     72     @Override
     73     protected void applyRestoredPayload(String key, byte[] payload) {
     74         IPackageManager pm = AppGlobals.getPackageManager();
     75         if (DEBUG) {
     76             Slog.d(TAG, "Handling restore of " + key);
     77         }
     78         try {
     79             // TODO: http://b/22388012
     80             switch (key) {
     81                 case KEY_PREFERRED:
     82                     pm.restorePreferredActivities(payload, UserHandle.USER_SYSTEM);
     83                     break;
     84                 case KEY_DEFAULT_APPS:
     85                     pm.restoreDefaultApps(payload, UserHandle.USER_SYSTEM);
     86                     break;
     87                 case KEY_INTENT_VERIFICATION:
     88                     pm.restoreIntentFilterVerification(payload, UserHandle.USER_SYSTEM);
     89                     break;
     90                 default:
     91                     Slog.w(TAG, "Unexpected restore key " + key);
     92             }
     93         } catch (Exception e) {
     94             Slog.w(TAG, "Unable to restore key " + key);
     95         }
     96     }
     97 }
     98