Google Drive Android API(GDAA)getResourceId()返回null(计时问题)

在测试SO 22295903中讨论的删除,垃圾功能时,我遇到了这个问题.

1 /创建包含内容的文件

GoogleApiClient _gac;
DriveFile createFileWait(DriveFolder fldr, String name, String mime, byte[] buff) {
  DriveFile drvFile = null;
  try { 
    ContentsResult rslt = Drive.DriveApi.newContents(_gac).await();
    if (rslt.getStatus().isSuccess()) {
      Contents cont = rslt.getContents();    
      cont.getOutputStream().write(buff);
      MetadataChangeSet meta = (mime == null) ?
          new MetadataChangeSet.Builder().setTitle(name).build() :
          new MetadataChangeSet.Builder().setTitle(name).setMimeType(mime).build();
      drvFile = fldr.createFile(_gac, meta, cont).await().getDriveFile();
    }
  } catch (Exception e) {}
  return drvFile;
}

2 /使用查询检索文件(它的标题):

ArrayList findAll(String title, String mime, DriveFolder fldr) {
  ArrayList dIDs = null;
  if (isConnected()) try {
    ArrayList fltrs = new ArrayList();
    fltrs.add(Filters.eq(SearchableField.TRASHED, false));
    if (title != null)  fltrs.add(Filters.eq(SearchableField.TITLE, title));
    if (mime  != null)  fltrs.add(Filters.eq(SearchableField.MIME_TYPE, mime));
    Query qry = new Query.Builder().addFilter(Filters.and(fltrs)).build(); 
    MetadataBufferResult rslt = (fldr == null) ? Drive.DriveApi.query(_gac, qry).await() : 
                                                   fldr.queryChildren(_gac, qry).await();
    if (rslt.getStatus().isSuccess()) {
      MetadataBuffer mdb = null;
      try { 
        mdb = rslt.getMetadataBuffer();
        if (mdb == null) return null;
        dIDs = new ArrayList();
        for (Metadata md : mdb) {
          if ((md == null) || md.isTrashed()) continue; 
          dIDs.add(md.getDriveId());
        }
      } finally { if (mdb != null) mdb.close(); } 
    }
  } catch (Exception e) {}
  return dIDs;
}

3 /您获得有效的DriveId.尝试使用它来获取在RESTful API或其他地方使用的资源ID.

String fileID = drvId.getResourceId();

你得到一个空值.片刻之后(随机,难以指定),如果您重复查询,您将最终获得您的资源ID.我知道为什么,这可能是一个延迟问题.我只是征求谷歌支持团队的评论.有办法获得控制权吗？查询延迟状态？