/* * 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 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 localEntries = new HashMap(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 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 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 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); } }