BookmarkWidgetService.java 文件源码

@BinderThread
private BookmarkFolder loadBookmarks(final BookmarkId folderId) {
    final LinkedBlockingQueue<BookmarkFolder> resultQueue = new LinkedBlockingQueue<>(1);
    //A reference of BookmarkLoader is needed in binder thread to
    //prevent it from being garbage collected.
    final BookmarkLoader bookmarkLoader = new BookmarkLoader();
    ThreadUtils.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            bookmarkLoader.initialize(mContext, folderId, new BookmarkLoaderCallback() {
                @Override
                public void onBookmarksLoaded(BookmarkFolder folder) {
                    resultQueue.add(folder);
                }
            });
        }
    });
    try {
        return resultQueue.take();
    } catch (InterruptedException e) {
        return null;
    }
}