86 lines
3.7 KiB
Java
86 lines
3.7 KiB
Java
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server;
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import android.app.backup.AbsoluteFileBackupHelper;
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import android.app.backup.BackupDataInput;
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import android.app.backup.BackupDataInputStream;
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import android.app.backup.BackupDataOutput;
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import android.app.backup.BackupHelper;
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import android.app.backup.BackupAgentHelper;
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import android.content.Context;
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import android.os.ParcelFileDescriptor;
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import android.os.ServiceManager;
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import android.os.SystemService;
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import android.util.Slog;
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import java.io.File;
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import java.io.IOException;
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/**
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* Backup agent for various system-managed data, currently just the system wallpaper
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*/
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public class SystemBackupAgent extends BackupAgentHelper {
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private static final String TAG = "SystemBackupAgent";
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// These paths must match what the WallpaperManagerService uses
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private static final String WALLPAPER_IMAGE = "/data/data/com.android.settings/files/wallpaper";
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private static final String WALLPAPER_INFO = "/data/system/wallpaper_info.xml";
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@Override
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public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
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ParcelFileDescriptor newState) throws IOException {
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// We only back up the data under the current "wallpaper" schema with metadata
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WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService(
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Context.WALLPAPER_SERVICE);
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String[] files = new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO };
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if (wallpaper != null && wallpaper.mName != null && wallpaper.mName.length() > 0) {
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// When the wallpaper has a name, back up the info by itself.
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// TODO: Don't rely on the innards of the service object like this!
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// TODO: Send a delete for any stored wallpaper image in this case?
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files = new String[] { WALLPAPER_INFO };
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}
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addHelper("wallpaper", new AbsoluteFileBackupHelper(SystemBackupAgent.this, files));
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super.onBackup(oldState, data, newState);
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}
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@Override
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public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState)
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throws IOException {
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// On restore, we also support a previous data schema "system_files"
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addHelper("wallpaper", new AbsoluteFileBackupHelper(SystemBackupAgent.this,
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new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO }));
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addHelper("system_files", new AbsoluteFileBackupHelper(SystemBackupAgent.this,
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new String[] { WALLPAPER_IMAGE }));
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boolean success = false;
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try {
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super.onRestore(data, appVersionCode, newState);
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WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService(
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Context.WALLPAPER_SERVICE);
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wallpaper.settingsRestored();
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} catch (IOException ex) {
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// If there was a failure, delete everything for the wallpaper, this is too aggresive,
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// but this is hopefully a rare failure.
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Slog.d(TAG, "restore failed", ex);
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(new File(WALLPAPER_IMAGE)).delete();
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(new File(WALLPAPER_INFO)).delete();
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}
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}
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}
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