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我正在尝试将 pdf 文件上传到 Google Docs/Drive，为此我使用以下代码...

int MAX_CONCURRENT_UPLOADS = 10;
int PROGRESS_UPDATE_INTERVAL = 1000;
int DEFAULT_CHUNK_SIZE = 10485760;

ExecutorService executor = Executors.newFixedThreadPool(MAX_CONCURRENT_UPLOADS);
File file = new File(filePath);
String mimeType=DocumentListEntry.MediaType.fromFileName(file.getName()).getMimeType();
String contentType=DocumentListEntry.MediaType.fromFileName(file.getName()).getMimeType();
MediaFileSource mediaFile = new MediaFileSource(file, contentType);
URL createUploadUrl = new URL("https://drive.google.com/feeds/upload/create-session/default/private/full");
FileUploadProgressListener listener = new FileUploadProgressListener();
ResumableGDataFileUploader uploader=new ResumableGDataFileUploader(createUploadUrl,mediaFile,service, DEFAULT_CHUNK_SIZE, executor, listener, PROGRESS_UPDATE_INTERVAL);

但是 FileUploadProgressListener 显示错误，它是一个 google api 还是一个类......？

请帮忙上传pdf文件有什么问题......

提前致谢

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