Got issue while downloading file from google drive

[ravi-vihaaInfotech]

I have created demo Application for google drive file sharing into my server. Below is my Process 

• Have enable google drive api in console

• Have connected googleApiClient

• Have fire intent for opening google drive file list

  IntentSender intentSender = Drive.DriveApi .newOpenFileActivityBuilder() .setMimeType(new String[]{"application/pdf", "application/vnd.openxmlformats-officedocument.wordprocessingml.document", "application/vnd.google-apps.spreadsheet", "application/vnd.google-apps.document", "application/vnd.google-apps.presentation"})

  startIntentSenderForResult(intentSender, REQUEST_CODE_OPENER, null, 0, 0, 0);

• And onActivityResult code and downloadFile code as below

  @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); try { if (resultCode == RESULT_OK) { DriveId driveId = (DriveId) data.getParcelableExtra(OpenFileActivityBuilder.EXTRA_RESPONSE_DRIVE_ID); DriveFile selectedFile = driveId.asDriveFile(); selectedFile.getMetadata(getGoogleApiClient()).setResultCallback(metadataRetrievedCallback); } } catch (Exception e) { e.printStackTrace(); } } ResultCallback metadataRetrievedCallback = new ResultCallback() { @Override public void onResult(DriveResource.MetadataResult result) { if (!result.getStatus().isSuccess()) { AppLog.e("problem", "Problem while trying to fetch metadata"); return; } Metadata metadata = result.getMetadata();

          if (metadata.getTitle().contains(".")) {
              fileName = metadata.getTitle();
          } else {
              if (metadata.getMimeType().contains("application/pdf"))
                  fileName = metadata.getTitle() + ".pdf";
              else if (metadata.getMimeType().contains("application/vnd.openxmlformats-officedocument.wordprocessingml.document"))
                  fileName = metadata.getTitle() + ".docx";
              else if (metadata.getMimeType().contains("application/vnd.google-apps.spreadsheet"))
                  fileName = metadata.getTitle() + ".xls";
              else if (metadata.getMimeType().contains("application/vnd.google-apps.presentation"))
                  fileName = metadata.getTitle() + ".pptx";
              else if (metadata.getMimeType().contains("application/vnd.google-apps.document"))
                  fileName = metadata.getTitle() + ".txt";
          }
          new FileDownloadTask().execute();
      }
  };

private class FileDownloadTask extends AsyncTask<String, Void, String> {

@Override
protected void onPreExecute() {
    super.onPreExecute();
    progressDialog = ProgressDialog.show(FileExplorerActivity.this, "", true, false, null);
}

@Override
protected String doInBackground(String... arg0) {
    downloadFileToSdCard();
    return null;
}

@Override
protected void onPostExecute(String s) {
    if (progressDialog != null && progressDialog.isShowing()) {
        progressDialog.dismiss();
    }
    super.onPostExecute(s);
    Intent intent = new Intent();
    intent.putExtra("filePath", Const.DOC_PATH + "/" + fileName);
    setResult(RESULT_OK, intent);
    finish();
}

private void downloadFileToSdCard() {
    try {
        selectedFile.open(getGoogleApiClient(), DriveFile.MODE_READ_ONLY, null).setResultCallback(contentsOpenedCallback);
    } catch (Exception io) {
        io.printStackTrace();
    }
}

}

ResultCallback contentsOpenedCallback = new ResultCallback() { @Override public void onResult(DriveApi.DriveContentsResult result) { if (!result.getStatus().isSuccess()) { return; }

            try {

                File dir = new File(Const.DOC_PATH);
                if (dir.exists() == false) {
                    dir.mkdirs();
                }
                String fName = fileName;
                File file = new File(dir, fName);
                if (file.exists())
                    file.delete();

                FileOutputStream fos = new FileOutputStream(file);
                DriveContents driveContents = result.getDriveContents();
                byte[] buffer = new byte[1024];
                int bufferLength = 0;
                InputStream inputStream = driveContents.getInputStream();
                while ((bufferLength = inputStream.read(buffer)) > 0) {
                    fos.write(buffer, 0, bufferLength);
                }
                driveContents.discard(getGoogleApiClient());
                fos.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    };

• Here in above “contentsOpenedCallback” i got my issue 
• i got driveContents value null for drive file which has created in google drive
• have used cradle version 2.2.2
• have used compile 'com.google.android.gms:play-services:9.8.0'

[asrivas]

Are you still having this issue?

[asrivas]

DriveApi.DriveContentsResult has been deprecated, please let us know if you are still having issues with the new recommendation. https://developers.google.com/android/reference/com/google/android/gms/drive/DriveApi.DriveContentsResult