Add cancelThumbnailRequest to thumbnail API. (b9944192) · Commits · e / os / android_frameworks_base

core/java/android/provider/MediaStore.java

+45 −0

Original line number	Diff line number	Diff line
		@@ -239,6 +239,26 @@ public final class MediaStore {
		private static final int MICRO_KIND = 3;
		private static final String[] PROJECTION = new String[] {_ID, MediaColumns.DATA};

		/**
		* This method cancels the thumbnail request so clients waiting for getThumbnail will be
		* interrupted and return immediately. Only the original process which made the getThumbnail
		* requests can cancel their own requests.
		*
		* @param cr ContentResolver
		* @param origId original image or video id
		* @param baseUri the base URI of requested thumbnails
		*/
		static void cancelThumbnailRequest(ContentResolver cr, long origId, Uri baseUri) {
		Uri cancelUri = baseUri.buildUpon().appendQueryParameter("cancel", "1")
		.appendQueryParameter("orig_id", String.valueOf(origId)).build();
		Cursor c = null;
		try {
		c = cr.query(cancelUri, PROJECTION, null, null, null);
		}
		finally {
		if (c != null) c.close();
		}
		}
		/**
		* This method ensure thumbnails associated with origId are generated and decode the byte
		* stream from database (MICRO_KIND) or file (MINI_KIND).
		@@ -257,6 +277,7 @@ public final class MediaStore {
		BitmapFactory.Options options, Uri baseUri, boolean isVideo) {
		Bitmap bitmap = null;
		String filePath = null;
		// Log.v(TAG, "getThumbnail: origId="+origId+", kind="+kind+", isVideo="+isVideo);
		// some optimization for MICRO_KIND: if the magic is non-zero, we don't bother
		// querying MediaProvider and simply return thumbnail.
		if (kind == MICRO_KIND) {
		@@ -634,6 +655,18 @@ public final class MediaStore {
		kind, null, null);
		}

		/**
		* This method cancels the thumbnail request so clients waiting for getThumbnail will be
		* interrupted and return immediately. Only the original process which made the getThumbnail
		* requests can cancel their own requests.
		*
		* @param cr ContentResolver
		* @param origId original image id
		*/
		public static void cancelThumbnailRequest(ContentResolver cr, long origId) {
		InternalThumbnails.cancelThumbnailRequest(cr, origId, EXTERNAL_CONTENT_URI);
		}

		/**
		* This method checks if the thumbnails of the specified image (origId) has been created.
		* It will be blocked until the thumbnails are generated.
		@@ -1551,6 +1584,18 @@ public final class MediaStore {
		*
		*/
		public static class Thumbnails implements BaseColumns {
		/**
		* This method cancels the thumbnail request so clients waiting for getThumbnail will be
		* interrupted and return immediately. Only the original process which made the getThumbnail
		* requests can cancel their own requests.
		*
		* @param cr ContentResolver
		* @param origId original video id
		*/
		public static void cancelThumbnailRequest(ContentResolver cr, long origId) {
		InternalThumbnails.cancelThumbnailRequest(cr, origId, EXTERNAL_CONTENT_URI);
		}

		/**
		* This method checks if the thumbnails of the specified image (origId) has been created.
		* It will be blocked until the thumbnails are generated.