Few things I would try to recover the deck:
- check if ankidroid is up to date;
- use the "check databse" of ankidroid;
- try synchronizing the deck on anki desktop and if necessary do a check db there.
The API I use is the one provided by ankidroid so that's why I suspect that it is not up to date. Otherwose either I have misinterpreted the specs of the API or there might be a bug in it. Because the code seems fine after reviewing it for your problem.
Were you ever able to open the deck or it was unusable from the start?
- check if ankidroid is up to date;
- use the "check databse" of ankidroid;
- try synchronizing the deck on anki desktop and if necessary do a check db there.
The API I use is the one provided by ankidroid so that's why I suspect that it is not up to date. Otherwose either I have misinterpreted the specs of the API or there might be a bug in it. Because the code seems fine after reviewing it for your problem.
Were you ever able to open the deck or it was unusable from the start?