public void downloadFile(String Id){
        ResultCallback<DriveApi.DriveContentsResult> contentsOpenedCallback =
                new ResultCallback<DriveApi.DriveContentsResult>() {
                    @Override
                    public void onResult(DriveApi.DriveContentsResult result) {
                        if (!result.getStatus().isSuccess()) {
                            Log.e("Error:","No se puede abrir el archivo o no se encuentra");
                            return;
                        }
                        DriveContents contents = result.getDriveContents();
                        BufferedInputStream bufferedInputStream = new BufferedInputStream(contents.getInputStream());
                        Bitmap bitmap = BitmapFactory.decodeStream(bufferedInputStream);
                        File file1 = new File(mSettings.getString("directory", "") + "/" + "test.jpg");
                        OutputStream outputStream = null;
                        try {
                            outputStream = new FileOutputStream(file1);
                            bitmap.compress(Bitmap.CompressFormat.PNG, 85, outputStream);
                            outputStream.flush();
                            outputStream.close();
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                        if(file1.exists())
                            log("file exist");

                    }
                };
        DriveFile file = Drive.DriveApi.getFile(mGoogleApiClient,DriveId.decodeFromString(id));
        file.open(mGoogleApiClient, DriveFile.MODE_READ_ONLY, null)
                .setResultCallback(contentsOpenedCallback);
//        FutureTask task  = new FutureTask()
    }