| /* |
| * 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.gallery3d.onetimeinitializer; |
| |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| import android.os.Build; |
| import android.os.Environment; |
| import android.preference.PreferenceManager; |
| import android.util.Log; |
| |
| import com.android.gallery3d.app.GalleryApp; |
| import com.android.gallery3d.common.ApiHelper; |
| import com.android.gallery3d.data.DataManager; |
| import com.android.gallery3d.data.LocalAlbum; |
| import com.android.gallery3d.data.MediaSet; |
| import com.android.gallery3d.data.Path; |
| import com.android.gallery3d.gadget.WidgetDatabaseHelper; |
| import com.android.gallery3d.gadget.WidgetDatabaseHelper.Entry; |
| import com.android.gallery3d.util.GalleryUtils; |
| |
| import java.io.File; |
| import java.util.HashMap; |
| import java.util.List; |
| |
| /** |
| * This one-timer migrates local-album gallery app widgets from old paths from prior releases |
| * to updated paths in the current build version. This migration is needed because of |
| * bucket ID (i.e., directory hash) change in JB and JB MR1 (The external storage path has changed |
| * from /mnt/sdcard in pre-JB releases, to /storage/sdcard0 in JB, then again |
| * to /external/storage/sdcard/0 in JB MR1). |
| */ |
| public class GalleryWidgetMigrator { |
| private static final String TAG = "GalleryWidgetMigrator"; |
| private static final String PRE_JB_EXT_PATH = "/mnt/sdcard"; |
| private static final String JB_EXT_PATH = "/storage/sdcard0"; |
| private static final String NEW_EXT_PATH = |
| Environment.getExternalStorageDirectory().getAbsolutePath(); |
| private static final int RELATIVE_PATH_START = NEW_EXT_PATH.length(); |
| private static final String KEY_EXT_PATH = "external_storage_path"; |
| |
| /** |
| * Migrates local-album gallery widgets from prior releases to current release |
| * due to bucket ID (i.e., directory hash) change. |
| */ |
| public static void migrateGalleryWidgets(Context context) { |
| SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); |
| // Migration is only needed when external storage path has changed |
| String extPath = prefs.getString(KEY_EXT_PATH, null); |
| boolean isDone = NEW_EXT_PATH.equals(extPath); |
| if (isDone) return; |
| |
| try { |
| migrateGalleryWidgetsInternal(context); |
| prefs.edit().putString(KEY_EXT_PATH, NEW_EXT_PATH).commit(); |
| } catch (Throwable t) { |
| // exception may be thrown if external storage is not available(?) |
| Log.w(TAG, "migrateGalleryWidgets", t); |
| } |
| } |
| |
| private static void migrateGalleryWidgetsInternal(Context context) { |
| GalleryApp galleryApp = (GalleryApp) context.getApplicationContext(); |
| DataManager manager = galleryApp.getDataManager(); |
| WidgetDatabaseHelper dbHelper = new WidgetDatabaseHelper(context); |
| |
| // only need to migrate local-album entries of type TYPE_ALBUM |
| List<Entry> entries = dbHelper.getEntries(WidgetDatabaseHelper.TYPE_ALBUM); |
| if (entries == null) return; |
| |
| // Check each entry's relativePath. If exists, update bucket id using relative |
| // path combined with external storage path. Otherwise, iterate through old external |
| // storage paths to find the relative path that matches the old bucket id, and then update |
| // bucket id and relative path |
| HashMap<Integer, Entry> localEntries = new HashMap<Integer, Entry>(entries.size()); |
| for (Entry entry : entries) { |
| Path path = Path.fromString(entry.albumPath); |
| MediaSet mediaSet = (MediaSet) manager.getMediaObject(path); |
| if (mediaSet instanceof LocalAlbum) { |
| if (entry.relativePath != null && entry.relativePath.length() > 0) { |
| // update entry using relative path + external storage path |
| updateEntryUsingRelativePath(entry, dbHelper); |
| } else { |
| int bucketId = Integer.parseInt(path.getSuffix()); |
| localEntries.put(bucketId, entry); |
| } |
| } |
| } |
| if (!localEntries.isEmpty()) migrateLocalEntries(context, localEntries, dbHelper); |
| } |
| |
| private static void migrateLocalEntries(Context context, |
| HashMap<Integer, Entry> entries, WidgetDatabaseHelper dbHelper) { |
| SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); |
| String oldExtPath = prefs.getString(KEY_EXT_PATH, null); |
| if (oldExtPath != null) { |
| migrateLocalEntries(entries, dbHelper, oldExtPath); |
| return; |
| } |
| // If old external storage path is unknown, it could be either Pre-JB or JB version |
| // we need to try both. |
| migrateLocalEntries(entries, dbHelper, PRE_JB_EXT_PATH); |
| if (!entries.isEmpty() && |
| Build.VERSION.SDK_INT > ApiHelper.VERSION_CODES.JELLY_BEAN) { |
| migrateLocalEntries(entries, dbHelper, JB_EXT_PATH); |
| } |
| } |
| |
| private static void migrateLocalEntries(HashMap<Integer, Entry> entries, |
| WidgetDatabaseHelper dbHelper, String oldExtPath) { |
| File root = Environment.getExternalStorageDirectory(); |
| // check the DCIM directory first; this should take care of 99% use cases |
| updatePath(new File(root, "DCIM"), entries, dbHelper, oldExtPath); |
| // check other directories if DCIM doesn't cut it |
| if (!entries.isEmpty()) updatePath(root, entries, dbHelper, oldExtPath); |
| } |
| private static void updatePath(File root, HashMap<Integer, Entry> entries, |
| WidgetDatabaseHelper dbHelper, String oldExtStorage) { |
| File[] files = root.listFiles(); |
| if (files != null) { |
| for (File file : files) { |
| if (file.isDirectory() && !entries.isEmpty()) { |
| String path = file.getAbsolutePath(); |
| String oldPath = oldExtStorage + path.substring(RELATIVE_PATH_START); |
| int oldBucketId = GalleryUtils.getBucketId(oldPath); |
| Entry entry = entries.remove(oldBucketId); |
| if (entry != null) { |
| int newBucketId = GalleryUtils.getBucketId(path); |
| String newAlbumPath = Path.fromString(entry.albumPath) |
| .getParent() |
| .getChild(newBucketId) |
| .toString(); |
| Log.d(TAG, "migrate from " + entry.albumPath + " to " + newAlbumPath); |
| entry.albumPath = newAlbumPath; |
| // update entry's relative path |
| entry.relativePath = path.substring(RELATIVE_PATH_START); |
| dbHelper.updateEntry(entry); |
| } |
| updatePath(file, entries, dbHelper, oldExtStorage); // recursion |
| } |
| } |
| } |
| } |
| |
| private static void updateEntryUsingRelativePath(Entry entry, WidgetDatabaseHelper dbHelper) { |
| String newPath = NEW_EXT_PATH + entry.relativePath; |
| int newBucketId = GalleryUtils.getBucketId(newPath); |
| String newAlbumPath = Path.fromString(entry.albumPath) |
| .getParent() |
| .getChild(newBucketId) |
| .toString(); |
| entry.albumPath = newAlbumPath; |
| dbHelper.updateEntry(entry); |
| } |
| } |