Question

我想从谷歌驱动器列出文件和文件夹，我需要使用此代码，但我不知道如何初始化Drive类，以便我可以执行此功能。请帮我！

private static List<File> retrieveAllFiles(Drive service) throws IOException {
    List<File> result = new ArrayList<File>();
    Files.List request = service.files().list();

    do {
      try {
        FileList files = request.execute();

        result.addAll(files.getItems());
        request.setPageToken(files.getNextPageToken());
      } catch (IOException e) {
        System.out.println("An error occurred: " + e);
        request.setPageToken(null);
      }
    } while (request.getPageToken() != null &&
             request.getPageToken().length() > 0);

    return result;
  }

Answer 1

您可以参考此链接
https://software.intel.com/en-us/android/articles/connecting-to-google-drive-from-an-android-app

下载示例源代码并进行调试您可以在以下位置触发该行：

@Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        // Connect to Google Drive
        mCredential = GoogleAccountCredential.usingOAuth2(this, Arrays.asList(DriveScopes.DRIVE));
        startActivityForResult(mCredential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER);

        //bla... bla...
    }

    @Override
        protected void onActivityResult(final int requestCode, final int resultCode, final Intent data)
        {
            switch (requestCode)
            {
            case REQUEST_ACCOUNT_PICKER:
                if(resultCode == RESULT_OK && data != null && data.getExtras() != null)
                {
                    String accountName = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME);
                    if(accountName != null)
                    {
                        mCredential.setSelectedAccountName(accountName);
                        mService = getDriveService(mCredential);
                    }
                }
                break;
    }
    }

列出文件和文件夹 - Google云端硬盘

1 个答案: