1 /* 2 * Copyright (C) 2012 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.gallery3d.onetimeinitializer; 18 19 import android.content.Context; 20 import android.content.SharedPreferences; 21 import android.os.Build; 22 import android.os.Environment; 23 import android.preference.PreferenceManager; 24 import android.util.Log; 25 26 import com.android.gallery3d.app.GalleryApp; 27 import com.android.gallery3d.common.ApiHelper; 28 import com.android.gallery3d.data.DataManager; 29 import com.android.gallery3d.data.LocalAlbum; 30 import com.android.gallery3d.data.MediaSet; 31 import com.android.gallery3d.data.Path; 32 import com.android.gallery3d.gadget.WidgetDatabaseHelper; 33 import com.android.gallery3d.gadget.WidgetDatabaseHelper.Entry; 34 import com.android.gallery3d.util.GalleryUtils; 35 36 import java.io.File; 37 import java.util.HashMap; 38 import java.util.List; 39 40 /** 41 * This one-timer migrates local-album gallery app widgets from old paths from prior releases 42 * to updated paths in the current build version. This migration is needed because of 43 * bucket ID (i.e., directory hash) change in JB and JB MR1 (The external storage path has changed 44 * from /mnt/sdcard in pre-JB releases, to /storage/sdcard0 in JB, then again 45 * to /external/storage/sdcard/0 in JB MR1). 46 */ 47 public class GalleryWidgetMigrator { 48 private static final String TAG = "GalleryWidgetMigrator"; 49 private static final String PRE_JB_EXT_PATH = "/mnt/sdcard"; 50 private static final String JB_EXT_PATH = "/storage/sdcard0"; 51 private static final String NEW_EXT_PATH = 52 Environment.getExternalStorageDirectory().getAbsolutePath(); 53 private static final int RELATIVE_PATH_START = NEW_EXT_PATH.length(); 54 private static final String KEY_EXT_PATH = "external_storage_path"; 55 56 /** 57 * Migrates local-album gallery widgets from prior releases to current release 58 * due to bucket ID (i.e., directory hash) change. 59 */ 60 public static void migrateGalleryWidgets(Context context) { 61 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); 62 // Migration is only needed when external storage path has changed 63 String extPath = prefs.getString(KEY_EXT_PATH, null); 64 boolean isDone = NEW_EXT_PATH.equals(extPath); 65 if (isDone) return; 66 67 try { 68 migrateGalleryWidgetsInternal(context); 69 prefs.edit().putString(KEY_EXT_PATH, NEW_EXT_PATH).commit(); 70 } catch (Throwable t) { 71 // exception may be thrown if external storage is not available(?) 72 Log.w(TAG, "migrateGalleryWidgets", t); 73 } 74 } 75 76 private static void migrateGalleryWidgetsInternal(Context context) { 77 GalleryApp galleryApp = (GalleryApp) context.getApplicationContext(); 78 DataManager manager = galleryApp.getDataManager(); 79 WidgetDatabaseHelper dbHelper = new WidgetDatabaseHelper(context); 80 81 // only need to migrate local-album entries of type TYPE_ALBUM 82 List<Entry> entries = dbHelper.getEntries(WidgetDatabaseHelper.TYPE_ALBUM); 83 if (entries == null) return; 84 85 // Check each entry's relativePath. If exists, update bucket id using relative 86 // path combined with external storage path. Otherwise, iterate through old external 87 // storage paths to find the relative path that matches the old bucket id, and then update 88 // bucket id and relative path 89 HashMap<Integer, Entry> localEntries = new HashMap<Integer, Entry>(entries.size()); 90 for (Entry entry : entries) { 91 Path path = Path.fromString(entry.albumPath); 92 MediaSet mediaSet = (MediaSet) manager.getMediaObject(path); 93 if (mediaSet instanceof LocalAlbum) { 94 if (entry.relativePath != null && entry.relativePath.length() > 0) { 95 // update entry using relative path + external storage path 96 updateEntryUsingRelativePath(entry, dbHelper); 97 } else { 98 int bucketId = Integer.parseInt(path.getSuffix()); 99 localEntries.put(bucketId, entry); 100 } 101 } 102 } 103 if (!localEntries.isEmpty()) migrateLocalEntries(context, localEntries, dbHelper); 104 } 105 106 private static void migrateLocalEntries(Context context, 107 HashMap<Integer, Entry> entries, WidgetDatabaseHelper dbHelper) { 108 SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); 109 String oldExtPath = prefs.getString(KEY_EXT_PATH, null); 110 if (oldExtPath != null) { 111 migrateLocalEntries(entries, dbHelper, oldExtPath); 112 return; 113 } 114 // If old external storage path is unknown, it could be either Pre-JB or JB version 115 // we need to try both. 116 migrateLocalEntries(entries, dbHelper, PRE_JB_EXT_PATH); 117 if (!entries.isEmpty() && 118 Build.VERSION.SDK_INT > ApiHelper.VERSION_CODES.JELLY_BEAN) { 119 migrateLocalEntries(entries, dbHelper, JB_EXT_PATH); 120 } 121 } 122 123 private static void migrateLocalEntries(HashMap<Integer, Entry> entries, 124 WidgetDatabaseHelper dbHelper, String oldExtPath) { 125 File root = Environment.getExternalStorageDirectory(); 126 // check the DCIM directory first; this should take care of 99% use cases 127 updatePath(new File(root, "DCIM"), entries, dbHelper, oldExtPath); 128 // check other directories if DCIM doesn't cut it 129 if (!entries.isEmpty()) updatePath(root, entries, dbHelper, oldExtPath); 130 } 131 private static void updatePath(File root, HashMap<Integer, Entry> entries, 132 WidgetDatabaseHelper dbHelper, String oldExtStorage) { 133 File[] files = root.listFiles(); 134 if (files != null) { 135 for (File file : files) { 136 if (file.isDirectory() && !entries.isEmpty()) { 137 String path = file.getAbsolutePath(); 138 String oldPath = oldExtStorage + path.substring(RELATIVE_PATH_START); 139 int oldBucketId = GalleryUtils.getBucketId(oldPath); 140 Entry entry = entries.remove(oldBucketId); 141 if (entry != null) { 142 int newBucketId = GalleryUtils.getBucketId(path); 143 String newAlbumPath = Path.fromString(entry.albumPath) 144 .getParent() 145 .getChild(newBucketId) 146 .toString(); 147 Log.d(TAG, "migrate from " + entry.albumPath + " to " + newAlbumPath); 148 entry.albumPath = newAlbumPath; 149 // update entry's relative path 150 entry.relativePath = path.substring(RELATIVE_PATH_START); 151 dbHelper.updateEntry(entry); 152 } 153 updatePath(file, entries, dbHelper, oldExtStorage); // recursion 154 } 155 } 156 } 157 } 158 159 private static void updateEntryUsingRelativePath(Entry entry, WidgetDatabaseHelper dbHelper) { 160 String newPath = NEW_EXT_PATH + entry.relativePath; 161 int newBucketId = GalleryUtils.getBucketId(newPath); 162 String newAlbumPath = Path.fromString(entry.albumPath) 163 .getParent() 164 .getChild(newBucketId) 165 .toString(); 166 entry.albumPath = newAlbumPath; 167 dbHelper.updateEntry(entry); 168 } 169 } 170
