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 function.
43 public static int getBucketId(String path) {
44 return (path.toLowerCase().hashCode());
47 private Context mContext;
48 private ContentObserver mObserver;
50 public LocalDataSource(Context context) {
54 public void setMimeFilter(boolean disableImages, boolean disableVideos) {
55 mDisableImages = disableImages;
56 mDisableVideos = disableVideos;
59 public void loadMediaSets(final MediaFeed feed) {
60 if (mContext == null) {
64 CacheService.loadMediaSets(feed, this, !mDisableImages, !mDisableVideos);
65 Handler handler = ((Gallery) mContext).getHandler();
66 ContentObserver observer = new ContentObserver(handler) {
67 public void onChange(boolean selfChange) {
68 CacheService.senseDirty(mContext, new CacheService.Observer() {
69 public void onChange(long[] ids) {
71 int numLongs = ids.length;
72 for (int i = 0; i < numLongs; ++i) {
73 refreshUI(feed, ids[i]);
82 Uri uriImages = Images.Media.EXTERNAL_CONTENT_URI;
83 Uri uriVideos = Video.Media.EXTERNAL_CONTENT_URI;
84 ContentResolver cr = mContext.getContentResolver();
86 cr.registerContentObserver(uriImages, false, observer);
87 cr.registerContentObserver(uriVideos, false, observer);
88 sObserverActive = true;
91 public void shutdown() {
92 if (ImageManager.isMediaScannerScanning(mContext.getContentResolver())) {
97 private void stopListeners() {
98 ContentResolver cr = mContext.getContentResolver();
99 if (mObserver != null) {
100 cr.unregisterContentObserver(mObserver);
102 sObserverActive = false;
105 protected void refreshUI(MediaFeed feed, long setIdToUse) {
106 if (setIdToUse == Shared.INVALID) {
109 Log.i(TAG, "Refreshing local data source");
110 if (feed.getMediaSet(setIdToUse) == null) {
111 MediaSet mediaSet = feed.addMediaSet(setIdToUse, this);
112 if (setIdToUse == CAMERA_BUCKET_ID) {
113 mediaSet.mName = CAMERA_STRING;
114 } else if (setIdToUse == DOWNLOAD_BUCKET_ID) {
115 mediaSet.mName = DOWNLOAD_STRING;
117 mediaSet.generateTitle(true);
119 MediaSet mediaSet = feed.replaceMediaSet(setIdToUse, this);
120 if (setIdToUse == CAMERA_BUCKET_ID) {
121 mediaSet.mName = CAMERA_STRING;
122 } else if (setIdToUse == DOWNLOAD_BUCKET_ID) {
123 mediaSet.mName = DOWNLOAD_STRING;
125 mediaSet.generateTitle(true);
129 public void loadItemsForSet(final MediaFeed feed, final MediaSet parentSet, int rangeStart, int rangeEnd) {
130 // Quick load from the cache.
131 if (mContext == null || parentSet == null) {
134 loadMediaItemsIntoMediaFeed(feed, parentSet, rangeStart, rangeEnd);
137 private void loadMediaItemsIntoMediaFeed(final MediaFeed mediaFeed, final MediaSet set, int rangeStart, int rangeEnd) {
138 if (rangeEnd - rangeStart < 0) {
141 CacheService.loadMediaItemsIntoMediaFeed(mediaFeed, set, rangeStart, rangeEnd, !mDisableImages, !mDisableVideos);
142 if (set.mId == CAMERA_BUCKET_ID) {
143 mediaFeed.moveSetToFront(set);
147 public boolean performOperation(final int operation, final ArrayList<MediaBucket> mediaBuckets, final Object data) {
148 int numBuckets = mediaBuckets.size();
149 ContentResolver cr = mContext.getContentResolver();
151 case MediaFeed.OPERATION_DELETE:
152 for (int i = 0; i < numBuckets; ++i) {
153 MediaBucket bucket = mediaBuckets.get(i);
154 MediaSet set = bucket.mediaSet;
155 ArrayList<MediaItem> items = bucket.mediaItems;
156 if (set != null && items == null) {
157 // Remove the entire bucket.
158 final Uri uriImages = Images.Media.EXTERNAL_CONTENT_URI;
159 final Uri uriVideos = Video.Media.EXTERNAL_CONTENT_URI;
160 final String whereImages = Images.ImageColumns.BUCKET_ID + "=" + Long.toString(set.mId);
161 final String whereVideos = Video.VideoColumns.BUCKET_ID + "=" + Long.toString(set.mId);
162 cr.delete(uriImages, whereImages, null);
163 cr.delete(uriVideos, whereVideos, null);
164 CacheService.markDirty(mContext);
166 if (set != null && items != null) {
167 // We need to remove these items from the set.
168 int numItems = items.size();
169 for (int j = 0; j < numItems; ++j) {
170 MediaItem item = items.get(j);
171 cr.delete(Uri.parse(item.mContentUri), null, null);
173 set.updateNumExpectedItems();
174 set.generateTitle(true);
175 CacheService.markDirty(mContext, set.mId);
179 case MediaFeed.OPERATION_ROTATE:
180 for (int i = 0; i < numBuckets; ++i) {
181 MediaBucket bucket = mediaBuckets.get(i);
182 ArrayList<MediaItem> items = bucket.mediaItems;
186 float angleToRotate = ((Float) data).floatValue();
187 if (angleToRotate == 0) {
190 int numItems = items.size();
191 for (int j = 0; j < numItems; ++j) {
192 rotateItem(items.get(j), angleToRotate);
200 private void rotateItem(final MediaItem item, float angleToRotate) {
201 ContentResolver cr = mContext.getContentResolver();
203 int currentOrientation = (int) item.mRotation;
204 angleToRotate += currentOrientation;
205 float rotation = Shared.normalizePositive(angleToRotate);
206 String rotationString = Integer.toString((int) rotation);
208 // Update the database entry.
209 ContentValues values = new ContentValues();
210 values.put(Images.ImageColumns.ORIENTATION, rotationString);
211 cr.update(Uri.parse(item.mContentUri), values, null, null);
213 // Update the file EXIF information.
214 Uri uri = Uri.parse(item.mContentUri);
215 String uriScheme = uri.getScheme();
216 if (uriScheme.equals("file")) {
217 ExifInterface exif = new ExifInterface(uri.getPath());
218 exif.setAttribute(ExifInterface.TAG_ORIENTATION, Integer.toString(Shared.degreesToExifOrientation(rotation)));
219 exif.saveAttributes();
222 // Invalidate the cache entry.
223 CacheService.markDirty(mContext, item.mParentMediaSet.mId);
225 // Update the object representation of the item.
226 item.mRotation = rotation;
227 } catch (Exception e) {
228 // System.out.println("Apparently not a JPEG");
232 public DiskCache getThumbnailCache() {
233 return sThumbnailCache;
236 public static MediaItem createMediaItemFromUri(Context context, Uri target) {
237 MediaItem item = null;
238 long id = ContentUris.parseId(target);
239 ContentResolver cr = context.getContentResolver();
240 String whereClause = Images.ImageColumns._ID + "=" + Long.toString(id);
241 Cursor cursor = cr.query(Images.Media.EXTERNAL_CONTENT_URI, CacheService.PROJECTION_IMAGES, whereClause, null, null);
242 if (cursor != null) {
243 if (cursor.moveToFirst()) {
244 item = new MediaItem();
245 CacheService.populateMediaItemFromCursor(item, cr, cursor, Images.Media.EXTERNAL_CONTENT_URI.toString() + "/");
253 public static MediaItem createMediaItemFromFileUri(Context context, String fileUri) {
254 MediaItem item = null;
255 String filepath = new File(URI.create(fileUri)).toString();
256 ContentResolver cr = context.getContentResolver();
257 long bucketId = SingleDataSource.parseBucketIdFromFileUri(fileUri);
258 String whereClause = Images.ImageColumns.BUCKET_ID + "=" + bucketId + " AND " + Images.ImageColumns.DATA + "='" + filepath
260 Cursor cursor = cr.query(Images.Media.EXTERNAL_CONTENT_URI, CacheService.PROJECTION_IMAGES, whereClause, null, null);
261 if (cursor != null) {
262 if (cursor.moveToFirst()) {
263 item = new MediaItem();
264 CacheService.populateMediaItemFromCursor(item, cr, cursor, Images.Media.EXTERNAL_CONTENT_URI.toString() + "/");