| /* |
| * Copyright (C) 2009 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.server; |
| |
| import android.app.backup.AbsoluteFileBackupHelper; |
| import android.app.backup.BackupDataInput; |
| import android.app.backup.BackupDataInputStream; |
| import android.app.backup.BackupDataOutput; |
| import android.app.backup.BackupHelper; |
| import android.app.backup.BackupAgentHelper; |
| import android.content.Context; |
| import android.os.ParcelFileDescriptor; |
| import android.os.ServiceManager; |
| import android.os.SystemService; |
| import android.util.Slog; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * Backup agent for various system-managed data, currently just the system wallpaper |
| */ |
| public class SystemBackupAgent extends BackupAgentHelper { |
| private static final String TAG = "SystemBackupAgent"; |
| |
| // These paths must match what the WallpaperManagerService uses |
| private static final String WALLPAPER_IMAGE = "/data/data/com.android.settings/files/wallpaper"; |
| private static final String WALLPAPER_INFO = "/data/system/wallpaper_info.xml"; |
| |
| @Override |
| public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data, |
| ParcelFileDescriptor newState) throws IOException { |
| // We only back up the data under the current "wallpaper" schema with metadata |
| WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService( |
| Context.WALLPAPER_SERVICE); |
| String[] files = new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO }; |
| if (wallpaper != null && wallpaper.mName != null && wallpaper.mName.length() > 0) { |
| // When the wallpaper has a name, back up the info by itself. |
| // TODO: Don't rely on the innards of the service object like this! |
| // TODO: Send a delete for any stored wallpaper image in this case? |
| files = new String[] { WALLPAPER_INFO }; |
| } |
| addHelper("wallpaper", new AbsoluteFileBackupHelper(SystemBackupAgent.this, files)); |
| super.onBackup(oldState, data, newState); |
| } |
| |
| @Override |
| public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) |
| throws IOException { |
| // On restore, we also support a previous data schema "system_files" |
| addHelper("wallpaper", new AbsoluteFileBackupHelper(SystemBackupAgent.this, |
| new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO })); |
| addHelper("system_files", new AbsoluteFileBackupHelper(SystemBackupAgent.this, |
| new String[] { WALLPAPER_IMAGE })); |
| |
| boolean success = false; |
| try { |
| super.onRestore(data, appVersionCode, newState); |
| |
| WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService( |
| Context.WALLPAPER_SERVICE); |
| wallpaper.settingsRestored(); |
| } catch (IOException ex) { |
| // If there was a failure, delete everything for the wallpaper, this is too aggresive, |
| // but this is hopefully a rare failure. |
| Slog.d(TAG, "restore failed", ex); |
| (new File(WALLPAPER_IMAGE)).delete(); |
| (new File(WALLPAPER_INFO)).delete(); |
| } |
| } |
| } |