Question

当我连续插入视频时，所有视频都会插入播放列表，但需要很长时间。当我使用多线程时，最后会丢失超过一半的视频。如何快速插入多个视频而不会丢失任何视频？

// Insert videos. 5 videos per asyncTask
List<List<YTVideo>> chunks = Lists.partition(videos, 5);
for (int i = 0; i < chunks.size(); i++) {
    videoAndPlaylistContainer container = new videoAndPlaylistContainer();
    container.playlistId = playlistId;
    List<YTVideo> chunk = chunks.get(i);
    container.videos = chunk;
    InsertPlayListItemTask insertPlaylistItemsTask = new InsertPlayListItemTask();
    runningTasks.add(insertPlaylistItemsTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,container));

}

 private class InsertPlayListItemTask extends AsyncTask<videoAndPlaylistContainer, Void, Void>{

        @Override
        protected Void doInBackground(videoAndPlaylistContainer... params) {
            videoAndPlaylistContainer container = params[0];
            List<YTVideo> videosChunk = container.videos;
            String playlistId = container.playlistId;
            for (int i = 0; i < videosChunk.size(); i++) {
                YTVideo video = videosChunk.get(i);
                String videoId = video.getId();
                long pos = video.getPosition();
                try {
                    ResourceId resourceId = new ResourceId();
                    resourceId.setKind("youtube#video");
                    resourceId.setVideoId(videoId);

                    PlaylistItemSnippet playlistItemSnippet = new PlaylistItemSnippet();
                    // playlistItemSnippet.setTitle("First video in the test playlist");
                    playlistItemSnippet.setPlaylistId(playlistId);
                    playlistItemSnippet.setResourceId(resourceId);
                    playlistItemSnippet.setPosition(pos);

                    PlaylistItem playlistItem = new PlaylistItem();
                    playlistItem.setSnippet(playlistItemSnippet);


                    YouTube.PlaylistItems.Insert playlistItemsInsertCommand =
                            youtube.playlistItems().insert("snippet", playlistItem);

                    playlistItemsInsertCommand.execute();

                    System.out.println("Inserted video: " + video);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            return null;
        }

编辑：videos.size（）到chunks.size（）。删除了insertedCount ++;

Answer 1

这条线看起来不正确......

videos变量将根据i集合的大小增长，但您只能使用chunks变量访问List<YTVideo> chunk = chunks.get(i);集合中的元素...

ArrayIndexOutOfBounds

我无法想象你为什么不（最终）获得$applyUsersDtials例外，除非你用少于5个视频测试你的代码（到目前为止）。

使用多线程将多个视频插入播放列表会导致视频丢失

1 个答案: