小编Gen*_*ikV的帖子

我正在使用Google Drive.Api,以便将用户的应用数据与用户驱动器帐户同步.

用户数据库采用sqlite数据库格式.我已成功将文件以二进制形式上传到驱动器,但无法从应用程序中下载文件.

我如何得到文件URl:

  final GoogleAccountCredential credential = GoogleAccountCredential.usingOAuth2(this, Arrays.asList(DriveScopes.DRIVE_FILE));
    credential.setSelectedAccountName(accountName);
    service = new com.google.api.services.drive.Drive.Builder(AndroidHttp.newCompatibleTransport(), new GsonFactory(), credential).build();

    Query query = new Query.Builder()
            .addFilter(Filters.eq(SearchableField.TITLE, "BackupFile"))
            .build();


    final DriveFolder folder = Drive.DriveApi.getRootFolder(mGoogleApiClient);
    folder.queryChildren(mGoogleApiClient, query).setResultCallback(new ResultCallback<DriveApi.MetadataBufferResult>() {
        @Override
        public void onResult(DriveApi.MetadataBufferResult metadataBufferResult) {
            final MetadataBuffer metadataBuffer = metadataBufferResult.getMetadataBuffer();
            int iCount = metadataBuffer.getCount();

            if (iCount == 1) {
                Log.i("Tag", "file was found");
                final DriveId myFileId = metadataBuffer.get(0).getDriveId();
                final DriveFile file = Drive.DriveApi.getFile(mGoogleApiClient, myFileId);

                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        DriveResource.MetadataResult …