元数据的字段之一是driveId.这是传递给Drive API读取数据的ID.请参见 https://developers.google.com/drive/v2/reference/files/get 获取get的API信息.

One of the fields of the metadata is driveId. This is the id to pass to the Drive API to read the data. See https://developers.google.com/drive/v2/reference/files/get for the API information for get.