| /* |
| * Copyright (C) 2010 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.data; |
| |
| import android.content.ContentResolver; |
| import android.content.res.Resources; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.provider.MediaStore; |
| import android.provider.MediaStore.Images; |
| import android.provider.MediaStore.Images.ImageColumns; |
| import android.provider.MediaStore.Video; |
| import android.provider.MediaStore.Video.VideoColumns; |
| |
| import com.android.gallery3d.R; |
| import com.android.gallery3d.app.GalleryApp; |
| import com.android.gallery3d.common.Utils; |
| import com.android.gallery3d.util.GalleryUtils; |
| import com.android.gallery3d.util.MediaSetUtils; |
| |
| import java.util.ArrayList; |
| |
| // LocalAlbumSet lists all media items in one bucket on local storage. |
| // The media items need to be all images or all videos, but not both. |
| public class LocalAlbum extends MediaSet { |
| private static final String TAG = "LocalAlbum"; |
| private static final String[] COUNT_PROJECTION = { "count(*)" }; |
| |
| private static final int INVALID_COUNT = -1; |
| private final String mWhereClause; |
| private final String mOrderClause; |
| private final Uri mBaseUri; |
| private final String[] mProjection; |
| |
| private final GalleryApp mApplication; |
| private final ContentResolver mResolver; |
| private final int mBucketId; |
| private final String mName; |
| private final boolean mIsImage; |
| private final ChangeNotifier mNotifier; |
| private final Path mItemPath; |
| private int mCachedCount = INVALID_COUNT; |
| |
| public LocalAlbum(Path path, GalleryApp application, int bucketId, |
| boolean isImage, String name) { |
| super(path, nextVersionNumber()); |
| mApplication = application; |
| mResolver = application.getContentResolver(); |
| mBucketId = bucketId; |
| mName = getLocalizedName(application.getResources(), bucketId, name); |
| mIsImage = isImage; |
| |
| if (isImage) { |
| mWhereClause = ImageColumns.BUCKET_ID + " = ?"; |
| mOrderClause = ImageColumns.DATE_TAKEN + " DESC, " |
| + ImageColumns._ID + " DESC"; |
| mBaseUri = Images.Media.EXTERNAL_CONTENT_URI; |
| mProjection = LocalImage.PROJECTION; |
| mItemPath = LocalImage.ITEM_PATH; |
| } else { |
| mWhereClause = VideoColumns.BUCKET_ID + " = ?"; |
| mOrderClause = VideoColumns.DATE_TAKEN + " DESC, " |
| + VideoColumns._ID + " DESC"; |
| mBaseUri = Video.Media.EXTERNAL_CONTENT_URI; |
| mProjection = LocalVideo.PROJECTION; |
| mItemPath = LocalVideo.ITEM_PATH; |
| } |
| |
| mNotifier = new ChangeNotifier(this, mBaseUri, application); |
| } |
| |
| public LocalAlbum(Path path, GalleryApp application, int bucketId, |
| boolean isImage) { |
| this(path, application, bucketId, isImage, |
| BucketHelper.getBucketName( |
| application.getContentResolver(), bucketId)); |
| } |
| |
| @Override |
| public boolean isCameraRoll() { |
| return mBucketId == MediaSetUtils.CAMERA_BUCKET_ID; |
| } |
| |
| @Override |
| public Uri getContentUri() { |
| if (mIsImage) { |
| return MediaStore.Images.Media.EXTERNAL_CONTENT_URI.buildUpon() |
| .appendQueryParameter(LocalSource.KEY_BUCKET_ID, |
| String.valueOf(mBucketId)).build(); |
| } else { |
| return MediaStore.Video.Media.EXTERNAL_CONTENT_URI.buildUpon() |
| .appendQueryParameter(LocalSource.KEY_BUCKET_ID, |
| String.valueOf(mBucketId)).build(); |
| } |
| } |
| |
| @Override |
| public ArrayList<MediaItem> getMediaItem(int start, int count) { |
| DataManager dataManager = mApplication.getDataManager(); |
| Uri uri = mBaseUri.buildUpon() |
| .appendQueryParameter("limit", start + "," + count).build(); |
| ArrayList<MediaItem> list = new ArrayList<MediaItem>(); |
| GalleryUtils.assertNotInRenderThread(); |
| Cursor cursor = mResolver.query( |
| uri, mProjection, mWhereClause, |
| new String[]{String.valueOf(mBucketId)}, |
| mOrderClause); |
| if (cursor == null) { |
| Log.w(TAG, "query fail: " + uri); |
| return list; |
| } |
| |
| try { |
| while (cursor.moveToNext()) { |
| int id = cursor.getInt(0); // _id must be in the first column |
| Path childPath = mItemPath.getChild(id); |
| MediaItem item = loadOrUpdateItem(childPath, cursor, |
| dataManager, mApplication, mIsImage); |
| list.add(item); |
| } |
| } finally { |
| cursor.close(); |
| } |
| return list; |
| } |
| |
| private static MediaItem loadOrUpdateItem(Path path, Cursor cursor, |
| DataManager dataManager, GalleryApp app, boolean isImage) { |
| synchronized (DataManager.LOCK) { |
| LocalMediaItem item = (LocalMediaItem) dataManager.peekMediaObject(path); |
| if (item == null) { |
| if (isImage) { |
| item = new LocalImage(path, app, cursor); |
| } else { |
| item = new LocalVideo(path, app, cursor); |
| } |
| } else { |
| item.updateContent(cursor); |
| } |
| return item; |
| } |
| } |
| |
| // The pids array are sorted by the (path) id. |
| public static MediaItem[] getMediaItemById( |
| GalleryApp application, boolean isImage, ArrayList<Integer> ids) { |
| // get the lower and upper bound of (path) id |
| MediaItem[] result = new MediaItem[ids.size()]; |
| if (ids.isEmpty()) return result; |
| int idLow = ids.get(0); |
| int idHigh = ids.get(ids.size() - 1); |
| |
| // prepare the query parameters |
| Uri baseUri; |
| String[] projection; |
| Path itemPath; |
| if (isImage) { |
| baseUri = Images.Media.EXTERNAL_CONTENT_URI; |
| projection = LocalImage.PROJECTION; |
| itemPath = LocalImage.ITEM_PATH; |
| } else { |
| baseUri = Video.Media.EXTERNAL_CONTENT_URI; |
| projection = LocalVideo.PROJECTION; |
| itemPath = LocalVideo.ITEM_PATH; |
| } |
| |
| ContentResolver resolver = application.getContentResolver(); |
| DataManager dataManager = application.getDataManager(); |
| Cursor cursor = resolver.query(baseUri, projection, "_id BETWEEN ? AND ?", |
| new String[]{String.valueOf(idLow), String.valueOf(idHigh)}, |
| "_id"); |
| if (cursor == null) { |
| Log.w(TAG, "query fail" + baseUri); |
| return result; |
| } |
| try { |
| int n = ids.size(); |
| int i = 0; |
| |
| while (i < n && cursor.moveToNext()) { |
| int id = cursor.getInt(0); // _id must be in the first column |
| |
| // Match id with the one on the ids list. |
| if (ids.get(i) > id) { |
| continue; |
| } |
| |
| while (ids.get(i) < id) { |
| if (++i >= n) { |
| return result; |
| } |
| } |
| |
| Path childPath = itemPath.getChild(id); |
| MediaItem item = loadOrUpdateItem(childPath, cursor, dataManager, |
| application, isImage); |
| result[i] = item; |
| ++i; |
| } |
| return result; |
| } finally { |
| cursor.close(); |
| } |
| } |
| |
| public static Cursor getItemCursor(ContentResolver resolver, Uri uri, |
| String[] projection, int id) { |
| return resolver.query(uri, projection, "_id=?", |
| new String[]{String.valueOf(id)}, null); |
| } |
| |
| @Override |
| public int getMediaItemCount() { |
| if (mCachedCount == INVALID_COUNT) { |
| Cursor cursor = mResolver.query( |
| mBaseUri, COUNT_PROJECTION, mWhereClause, |
| new String[]{String.valueOf(mBucketId)}, null); |
| if (cursor == null) { |
| Log.w(TAG, "query fail"); |
| return 0; |
| } |
| try { |
| Utils.assertTrue(cursor.moveToNext()); |
| mCachedCount = cursor.getInt(0); |
| } finally { |
| cursor.close(); |
| } |
| } |
| return mCachedCount; |
| } |
| |
| @Override |
| public String getName() { |
| return mName; |
| } |
| |
| @Override |
| public long reload() { |
| if (mNotifier.isDirty()) { |
| mDataVersion = nextVersionNumber(); |
| mCachedCount = INVALID_COUNT; |
| } |
| return mDataVersion; |
| } |
| |
| @Override |
| public int getSupportedOperations() { |
| return SUPPORT_DELETE | SUPPORT_SHARE | SUPPORT_INFO; |
| } |
| |
| @Override |
| public void delete() { |
| GalleryUtils.assertNotInRenderThread(); |
| mResolver.delete(mBaseUri, mWhereClause, |
| new String[]{String.valueOf(mBucketId)}); |
| } |
| |
| @Override |
| public boolean isLeafAlbum() { |
| return true; |
| } |
| |
| public static String getLocalizedName(Resources res, int bucketId, |
| String name) { |
| if (bucketId == MediaSetUtils.CAMERA_BUCKET_ID) { |
| return res.getString(R.string.folder_camera); |
| } else if (bucketId == MediaSetUtils.DOWNLOAD_BUCKET_ID) { |
| return res.getString(R.string.folder_download); |
| } else if (bucketId == MediaSetUtils.IMPORTED_BUCKET_ID) { |
| return res.getString(R.string.folder_imported); |
| } else if (bucketId == MediaSetUtils.SNAPSHOT_BUCKET_ID) { |
| return res.getString(R.string.folder_screenshot); |
| } else if (bucketId == MediaSetUtils.EDITED_ONLINE_PHOTOS_BUCKET_ID) { |
| return res.getString(R.string.folder_edited_online_photos); |
| } else { |
| return name; |
| } |
| } |
| } |