1 package com.cooliris.media;
5 import java.util.ArrayList;
7 import android.content.ContentResolver;
8 import android.content.ContentUris;
9 import android.content.ContentValues;
10 import android.content.Context;
11 import android.database.ContentObserver;
12 import android.database.Cursor;
13 import android.media.ExifInterface;
14 import android.net.Uri;
15 import android.os.Environment;
16 import android.os.Handler;
17 import android.provider.MediaStore.Images;
18 import android.provider.MediaStore.Video;
19 import android.util.Log;
21 import com.cooliris.cache.CacheService;
23 public final class LocalDataSource implements DataSource {
24 private static final String TAG = "LocalDataSource";
26 public static final DiskCache sThumbnailCache = new DiskCache("local-image-thumbs");
27 public static final DiskCache sThumbnailCacheVideo = new DiskCache("local-video-thumbs");
29 public static final String CAMERA_STRING = "Camera";
30 public static final String DOWNLOAD_STRING = "download";
31 public static final String CAMERA_BUCKET_NAME = Environment.getExternalStorageDirectory().toString() + "/DCIM/" + CAMERA_STRING;
32 public static final String DOWNLOAD_BUCKET_NAME = Environment.getExternalStorageDirectory().toString() + "/" + DOWNLOAD_STRING;
33 public static final int CAMERA_BUCKET_ID = getBucketId(CAMERA_BUCKET_NAME);
34 public static final int DOWNLOAD_BUCKET_ID = getBucketId(DOWNLOAD_BUCKET_NAME);
36 public static boolean sObserverActive = false;
37 private boolean mDisableImages;
38 private boolean mDisableVideos;
41 * Matches code in MediaProvider.computeBucketValues. Should be a common
44 public static int getBucketId(String path) {
45 return (path.toLowerCase().hashCode());
48 private Context mContext;
49 private ContentObserver mObserver;
51 public LocalDataSource(Context context) {
55 public void setMimeFilter(boolean disableImages, boolean disableVideos) {
56 mDisableImages = disableImages;
57 mDisableVideos = disableVideos;
60 public void loadMediaSets(final MediaFeed feed) {
61 if (mContext == null) {
65 CacheService.loadMediaSets(feed, this, !mDisableImages, !mDisableVideos);
66 Handler handler = ((Gallery) mContext).getHandler();
67 ContentObserver observer = new ContentObserver(handler) {
68 public void onChange(boolean selfChange) {
69 MediaSet mediaSet = feed.getCurrentSet();
70 if (mediaSet != null) {
71 CacheService.markDirtyImmediate(mediaSet.mId);
72 refreshUI(feed, mediaSet.mId);
74 CacheService.senseDirty(mContext, new CacheService.Observer() {
75 public void onChange(long[] ids) {
77 int numLongs = ids.length;
78 for (int i = 0; i < numLongs; ++i) {
79 refreshUI(feed, ids[i]);
88 Uri uriImages = Images.Media.EXTERNAL_CONTENT_URI;
89 Uri uriVideos = Video.Media.EXTERNAL_CONTENT_URI;
90 ContentResolver cr = mContext.getContentResolver();
92 cr.registerContentObserver(uriImages, false, observer);
93 cr.registerContentObserver(uriVideos, false, observer);
94 sObserverActive = true;
97 public void shutdown() {
98 if (ImageManager.isMediaScannerScanning(mContext.getContentResolver())) {
103 private void stopListeners() {
104 ContentResolver cr = mContext.getContentResolver();
105 if (mObserver != null) {
106 cr.unregisterContentObserver(mObserver);
108 sObserverActive = false;
111 protected void refreshUI(MediaFeed feed, long setIdToUse) {
112 if (setIdToUse == Shared.INVALID) {
115 if (feed.getMediaSet(setIdToUse) == null) {
116 MediaSet mediaSet = feed.addMediaSet(setIdToUse, this);
117 if (setIdToUse == CAMERA_BUCKET_ID) {
118 mediaSet.mName = CAMERA_STRING;
119 } else if (setIdToUse == DOWNLOAD_BUCKET_ID) {
120 mediaSet.mName = DOWNLOAD_STRING;
122 mediaSet.generateTitle(true);
124 MediaSet mediaSet = feed.replaceMediaSet(setIdToUse, this);
125 Log.i(TAG, "Replacing mediaset " + mediaSet.mName + " id " + setIdToUse + " current Id " + mediaSet.mId);
126 if (setIdToUse == CAMERA_BUCKET_ID) {
127 mediaSet.mName = CAMERA_STRING;
128 } else if (setIdToUse == DOWNLOAD_BUCKET_ID) {
129 mediaSet.mName = DOWNLOAD_STRING;
131 mediaSet.generateTitle(true);
135 public void loadItemsForSet(final MediaFeed feed, final MediaSet parentSet, int rangeStart, int rangeEnd) {
136 // Quick load from the cache.
137 if (mContext == null || parentSet == null) {
140 loadMediaItemsIntoMediaFeed(feed, parentSet, rangeStart, rangeEnd);
143 private void loadMediaItemsIntoMediaFeed(final MediaFeed mediaFeed, final MediaSet set, int rangeStart, int rangeEnd) {
144 if (rangeEnd - rangeStart < 0) {
147 CacheService.loadMediaItemsIntoMediaFeed(mediaFeed, set, rangeStart, rangeEnd, !mDisableImages, !mDisableVideos);
148 if (set.mId == CAMERA_BUCKET_ID) {
149 mediaFeed.moveSetToFront(set);
153 public boolean performOperation(final int operation, final ArrayList<MediaBucket> mediaBuckets, final Object data) {
154 int numBuckets = mediaBuckets.size();
155 ContentResolver cr = mContext.getContentResolver();
157 case MediaFeed.OPERATION_DELETE:
158 for (int i = 0; i < numBuckets; ++i) {
159 MediaBucket bucket = mediaBuckets.get(i);
160 MediaSet set = bucket.mediaSet;
161 ArrayList<MediaItem> items = bucket.mediaItems;
162 if (set != null && items == null) {
163 // Remove the entire bucket.
164 final Uri uriImages = Images.Media.EXTERNAL_CONTENT_URI;
165 final Uri uriVideos = Video.Media.EXTERNAL_CONTENT_URI;
166 final String whereImages = Images.ImageColumns.BUCKET_ID + "=" + Long.toString(set.mId);
167 final String whereVideos = Video.VideoColumns.BUCKET_ID + "=" + Long.toString(set.mId);
168 cr.delete(uriImages, whereImages, null);
169 cr.delete(uriVideos, whereVideos, null);
170 CacheService.markDirty(mContext);
172 if (set != null && items != null) {
173 // We need to remove these items from the set.
174 int numItems = items.size();
176 for (int j = 0; j < numItems; ++j) {
177 MediaItem item = items.get(j);
178 cr.delete(Uri.parse(item.mContentUri), null, null);
180 } catch (Exception e) {
181 // If the database operation failed for any reason.
184 set.updateNumExpectedItems();
185 set.generateTitle(true);
186 CacheService.markDirty(mContext, set.mId);
190 case MediaFeed.OPERATION_ROTATE:
191 for (int i = 0; i < numBuckets; ++i) {
192 MediaBucket bucket = mediaBuckets.get(i);
193 ArrayList<MediaItem> items = bucket.mediaItems;
197 float angleToRotate = ((Float) data).floatValue();
198 if (angleToRotate == 0) {
201 int numItems = items.size();
202 for (int j = 0; j < numItems; ++j) {
203 rotateItem(items.get(j), angleToRotate);
211 private void rotateItem(final MediaItem item, float angleToRotate) {
212 ContentResolver cr = mContext.getContentResolver();
214 int currentOrientation = (int) item.mRotation;
215 angleToRotate += currentOrientation;
216 float rotation = Shared.normalizePositive(angleToRotate);
217 String rotationString = Integer.toString((int) rotation);
219 // Update the database entry.
220 ContentValues values = new ContentValues();
221 values.put(Images.ImageColumns.ORIENTATION, rotationString);
223 cr.update(Uri.parse(item.mContentUri), values, null, null);
224 } catch (Exception e) {
225 // If the database operation fails for any reason.
229 // Update the file EXIF information.
230 Uri uri = Uri.parse(item.mContentUri);
231 String uriScheme = uri.getScheme();
232 if (uriScheme.equals("file")) {
233 ExifInterface exif = new ExifInterface(uri.getPath());
234 exif.setAttribute(ExifInterface.TAG_ORIENTATION, Integer.toString(Shared.degreesToExifOrientation(rotation)));
235 exif.saveAttributes();
238 // Invalidate the cache entry.
239 CacheService.markDirty(mContext, item.mParentMediaSet.mId);
241 // Update the object representation of the item.
242 item.mRotation = rotation;
243 } catch (Exception e) {
244 // System.out.println("Apparently not a JPEG");
248 public DiskCache getThumbnailCache() {
249 return sThumbnailCache;
252 public static MediaItem createMediaItemFromUri(Context context, Uri target) {
253 MediaItem item = null;
254 long id = ContentUris.parseId(target);
255 ContentResolver cr = context.getContentResolver();
256 String whereClause = Images.ImageColumns._ID + "=" + Long.toString(id);
258 Cursor cursor = cr.query(Images.Media.EXTERNAL_CONTENT_URI, CacheService.PROJECTION_IMAGES, whereClause, null, null);
259 if (cursor != null) {
260 if (cursor.moveToFirst()) {
261 item = new MediaItem();
262 CacheService.populateMediaItemFromCursor(item, cr, cursor, Images.Media.EXTERNAL_CONTENT_URI.toString() + "/");
267 } catch (Exception e) {
268 // If the database operation failed for any reason.
274 public static MediaItem createMediaItemFromFileUri(Context context, String fileUri) {
275 MediaItem item = null;
276 String filepath = new File(URI.create(fileUri)).toString();
277 ContentResolver cr = context.getContentResolver();
278 long bucketId = SingleDataSource.parseBucketIdFromFileUri(fileUri);
279 String whereClause = Images.ImageColumns.BUCKET_ID + "=" + bucketId + " AND " + Images.ImageColumns.DATA + "='" + filepath
282 Cursor cursor = cr.query(Images.Media.EXTERNAL_CONTENT_URI, CacheService.PROJECTION_IMAGES, whereClause, null, null);
283 if (cursor != null) {
284 if (cursor.moveToFirst()) {
285 item = new MediaItem();
286 CacheService.populateMediaItemFromCursor(item, cr, cursor, Images.Media.EXTERNAL_CONTENT_URI.toString() + "/");
291 } catch (Exception e) {
292 // If the database operation failed for any reason.