Question

我可以使用CreateFileActivity.java在Google云端硬盘中创建一个文件。但我想一次将两个或多个文件上传到谷歌硬盘。如何在谷歌硬盘中创建多个文件的android？

Answer 1

假设您的Android设备上有多个文件，由具有已知名称（标题）和mime类型的 java.io.File 对象表示：

  java.io.File[] files = {...};
  String[] names[] = {...};
  String[] mimes[] = {...};

您可以使用此构造在Google云端硬盘中创建一组文件（例如，在根目录中）：

  com.google.android.gms.common.api.GoogleApiClient mGooApiClient;

  void foo() {
    for (int i = 0; i < files.length; i++) {
      createFile(null, names[i], mimes[i], files[i]);
    }
  }

   /***********************************************************************
   * create file in GOODrive
   * @param pFldr parent's ID, (null for root)
   * @param titl  file name
   * @param mime  file mime type
   * @param file  java.io.File (with content) to create
   */
  void createFile(DriveFolder pFldr, final String titl, final String mime, final File file) {
    DriveId dId = null;
    if (mGooApiClient != null && mGooApiClient.isConnected() && titl != null && mime != null && file != null) try {

      final DriveFolder parent =  pFldr != null ? pFldr : Drive.DriveApi.getRootFolder(mGooApiClient);
      if (pFldr == null) return; //----------------->>>

      Drive.DriveApi.newDriveContents(mGAC).setResultCallback(new ResultCallback<DriveContentsResult>() {
        @Override
        public void onResult(DriveContentsResult driveContentsResult) {
          DriveContents cont = driveContentsResult != null && driveContentsResult.getStatus().isSuccess() ?
            driveContentsResult.getDriveContents() : null;
          if (cont != null) try {
            OutputStream oos = cont.getOutputStream();
            if (oos != null) try {
              InputStream is = new FileInputStream(file);
              byte[] buf = new byte[4096];
              int c;
              while ((c = is.read(buf, 0, buf.length)) > 0) {
                oos.write(buf, 0, c);
                oos.flush();
              }
            }
            finally { oos.close();}

            MetadataChangeSet meta = new Builder().setTitle(titl).setMimeType(mime).build();

            parent.createFile(mGooApiClient, meta, cont).setResultCallback(new ResultCallback<DriveFileResult>() {
              @Override
              public void onResult(DriveFileResult driveFileResult) {
                DriveFile dFil = driveFileResult != null && driveFileResult.getStatus().isSuccess() ?
                                                                      driveFileResult.getDriveFile() : null;
                if (dFil != null) {
                  // save dFil, report success
                } else {
                  // handle error
                }
              }
            });
         } catch (Exception e)  {e.printStackTrace();}
        }
      });
    } catch (Exception e) { e.printStackTrace(); }
  }

不要忘记保存DriveFile（或DriveId）或创建的文件。

祝你好运

如何使用Android版Drive API以编程方式创建多个文件？

1 个答案: