Google Sheets Error 401 , I Can't Add/edit Data On Spreadsheet

I am creating an Android app that reads data from a google spreadsheet & takes new values from user input to update/create a row or more in the same spreadsheet. Actually, with

Solution 1:

I expect the problem is that you're not passing any authentication. A 401 is an "UNAUTHORIZED" response. Reads can be down without authorization if the spreadsheet is public, but writes from the API require authorization, even if the spreadsheet is public.

You should consider using the Sheets API client libraries, which simplify the work for you and make authentication easier.