Stream audio file from Google Drive returns Code 403

Question

I want to stream an audio file from Google Drive. The Google Drive file is public, so who has the link can access it.

Creating the link works in my app as described below:

• login in Google Drive (Drive is in production, and downloading files works)
• Scan account for audiofiles
• get id from audiofile
• generate linke from audiofile

generate link like: String link = getFiles().get(i).getWebContentLink()+"&access_token="+acessTokenDrive+"&alt=media";

Example Link: https://drive.google.com/uc?id=<FileID>&access_token=<Token>&alt=media

the link works in chrome and edge browser (with and without logged in user) but not in the app.

Checking availibility of audiofile with

HttpURLConnection connection = (HttpURLConnection) url.openConnection();
int code = connection.getResponseCode();

returns 403 (and no quotas reached), but are there any other restrictions or limitations

After further testing, I found that for few files the getWebContentLink works, then the 403 errors occurs.

Any suggestions?

Thanks, GGK