Issue with OAuth2 authentication with google spreadsheet

Question

I am using java library for oauth2 authentication for accessing google spreadsheet.

I am using below code for OAuth2 authentication:

credential = new         


        

Answer 1

I use:

spreadsheetService = new SpreadsheetService("cellmaster.com.au-v0.2");  
spreadsheetService.setHeader("Authorization", "Bearer " + accessToken);

rather than:

spreadsheetService = new SpreadsheetService("cellmaster.com.au-v0.2");  
spreadsheetService.setOAuth2Credentials(credential);

also I had to add code for the refresh token. As the access token soon expires. But the refresh token works as you would expect.