android 系统相册源码

package com.cooliris.cache; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.URISyntaxException; import java.nio.ByteBuffer; import java.nio.LongBuffer; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.Locale; import java.util.concurrent.atomic.AtomicReference; import android.app.IntentService; import android.content.ContentResolver; import android.content.ContentValues; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.database.MergeCursor; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.media.ExifInterface; import android.net.Uri; import android.os.Environment; import android.os.Process; import android.os.SystemClock; import android.provider.MediaStore; import android.provider.MediaStore.Images; import android.provider.MediaStore.Video; import android.util.Log; import com.cooliris.media.DataSource; import com.cooliris.media.DiskCache; import com.cooliris.media.Gallery; import com.cooliris.media.LocalDataSource; import com.cooliris.media.LongSparseArray; import com.cooliris.media.MediaFeed; import com.cooliris.media.MediaItem; import com.cooliris.media.MediaSet; import com.cooliris.media.R; import com.cooliris.media.Shared; import com.cooliris.media.SortCursor; import com.cooliris.media.UriTexture; import com.cooliris.media.Utils; public final class CacheService extends IntentService { public static final String ACTION_CACHE = "com.cooliris.cache.action.CACHE"; public static final DiskCache sAlbumCache = new DiskCache("local-album-cache"); public static final DiskCache sMetaAlbumCache = new DiskCache("local-meta-cache"); public static final DiskCache sSkipThumbnailIds = new DiskCache("local-skip-cache"); private static final String TAG = "CacheService"; private static ImageList sList = null; // Wait 2 seconds to start the thumbnailer so that the application can load // without any overheads. private static final int THUMBNAILER_WAIT_IN_MS = 2000; private static final int DEFAULT_THUMBNAIL_WIDTH = 128; private static final int DEFAULT_THUMBNAIL_HEIGHT = 96; public static final String DEFAULT_IMAGE_SORT_ORDER = Images.ImageColumns.DATE_TAKEN + " ASC"; public static final String DEFAULT_VIDEO_SORT_ORDER = Video.VideoColumns.DATE_TAKEN + " ASC"; public static final String DEFAULT_BUCKET_SORT_ORDER = "upper(" + Images.ImageColumns.BUCKET_DISPLAY_NAME + ") ASC"; // Must preserve order between these indices and the order of the terms in // BUCKET_PROJECTION_IMAGES, BUCKET_PROJECTION_VIDEOS. // Not using SortedHashMap for efficieny reasons. public static final int BUCKET_ID_INDEX = 0; public static final int BUCKET_NAME_INDEX = 1; public static final String[] BUCKET_PROJECTION_IMAGES = new String[] { Images.ImageColumns.BUCKET_ID, Images.ImageColumns.BUCKET_DISPLAY_NAME }; public static final String[] BUCKET_PROJECTION_VIDEOS = new String[] { Video.VideoColumns.BUCKET_ID, Video.VideoColumns.BUCKET_DISPLAY_NAME }; // Must preserve order between these indices and the order of the terms in // THUMBNAIL_PROJECTION. public static final int THUMBNAIL_ID_INDEX = 0; public static final int THUMBNAIL_DATE_MODIFIED_INDEX = 1; public static final int THUMBNAIL_DATA_INDEX = 2; public static final int THUMBNAIL_ORIENTATION_INDEX = 2; public static final String[] THUMBNAIL_PROJECTION = new String[] { Images.ImageColumns._ID, Images.ImageColumns.DATE_MODIFIED, Images.ImageColumns.DATA, Images.ImageColumns.ORIENTATION }; public static final String[] SENSE_PROJECTION = new String[] { Images.ImageColumns.BUCKET_ID, "MAX(" + Images.ImageColumns.DATE_ADDED + "), COUNT(*)" }; // Must preserve order between these indices and the order of the terms in // INITIAL_PROJECTION_IMAGES and // INITIAL_PROJECTION_VIDEOS. public static final int MEDIA_ID_INDEX = 0; public static final int MEDIA_CAPTION_INDEX = 1; public static final int MEDIA_MIME_TYPE_INDEX = 2; public static final int MEDIA_LATITUDE_INDEX = 3; public static final int MEDIA_LONGITUDE_INDEX = 4; public static final int MEDIA_DATE_TAKEN_INDEX = 5; public static final int MEDIA_DATE_ADDED_INDEX = 6; public static final int MEDIA_DATE_MODIFIED_INDEX = 7; public static final int MEDIA_DATA_INDEX = 8; public static final int MEDIA_ORIENTATION_OR_DURATION_INDEX = 9; public static final int MEDIA_BUCKET_ID_INDEX = 10; public static final String[] PROJECTION_IMAGES = new String[] { Images.ImageColumns._ID, Images.ImageColumns.TITLE, Images.ImageColumns.MIME_TYPE, Images.ImageColumns.LATITUDE, Images.ImageColumns.LONGITUDE, Images.ImageColumns.DATE_TAKEN, Images.ImageColumns.DATE_ADDED, Images.ImageColumns.DATE_MODIFIED, Images.ImageColumns.DATA, Images.ImageColumns.ORIENTATION, Images.ImageColumns.BUCKET_ID }; private static final String[] PROJECTION_VIDEOS = new String[] { Video.VideoColumns._ID, Video.VideoColumns.TITLE, Video.VideoColumns.MIME_TYPE, Video.VideoColumns.LATITUDE, Video.VideoColumns.LONGITUDE, Video.VideoColumns.DATE_TAKEN, Video.VideoColumns.DATE_ADDED, Video.VideoColumns.DATE_MODIFIED, Video.VideoColumns.DATA, Video.VideoColumns.DURATION, Video.VideoColumns.BUCKET_ID }; public static final String BASE_CONTENT_STRING_IMAGES = (Images.Media.EXTERNAL_CONTENT_URI).toString() + "/"; public static final String BASE_CONTENT_STRING_VIDEOS = (Video.Media.EXTERNAL_CONTENT_URI).toString() + "/"; private static final AtomicReference<Thread> CACHE_THREAD = new AtomicReference<Thread>(); private static final AtomicReference<Thread> THUMBNAIL_THREAD = new AtomicReference<Thread>(); // Special indices in the Albumcache. private static final int ALBUM_CACHE_METADATA_INDEX = -1; private static final int ALBUM_CACHE_DIRTY_INDEX = -2; private static final int ALBUM_CACHE_INCOMPLETE_INDEX = -3; private static final int ALBUM_CACHE_DIRTY_BUCKET_INDEX = -4; private static final int ALBUM_CACHE_LOCALE_INDEX = -5; private static final DateFormat mDateFormat = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss"); private static final DateFormat mAltDateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"); private static final byte[] sDummyData = new byte[] { 1 }; private static boolean QUEUE_DIRTY_SET; private static boolean QUEUE_DIRTY_ALL; private static boolean QUEUE_DIRTY_SENSE; public interface Observer { void onChange(long[] bucketIds); } public static final String getCachePath(final String subFolderName) { return Environment.getExternalStorageDirectory() + "/Android/data/com.cooliris.media/cache/" + subFolderName; } public static final void startCache(final Context context, final boolean checkthumbnails) { final Locale locale = getLocaleForAlbumCache(); final Locale defaultLocale = Locale.getDefault(); if (locale == null || !locale.equals(defaultLocale)) { sAlbumCache.deleteAll(); putLocaleForAlbumCache(defaultLocale); } final Intent intent = new Intent(ACTION_CACHE, null, context, CacheService.class); intent.putExtra("checkthumbnails", checkthumbnails); context.startService(intent); } public static final boolean isCacheReady(final boolean onlyMediaSets) { if (onlyMediaSets) { return (sAlbumCache.get(ALBUM_CACHE_METADATA_INDEX, 0) != null && sAlbumCac