Authentication through Oauth2

Question

For getting results using Google Analytics, if I access the following URL:

https://www.googleapis.com/analytics/v3/data/ga?ids=gaxxxxx&start-date=2014-07-01&end-date=2014-07-15&metrics=gapageviews&dimensions=gapagePath&access_token= {YOUR_ACCESS_TOKEN}

I get JSON response if and only if I get an access token using oauth2 playground and navigate to the URL mentioned above, but that access token is only valid for 1 hour, kindly tell how can I automatically authenticate using auth2 so need of access token is not there. Thanx

Answer 1

Store the token in the shared preferences in Android (or in persistent storage, in case of C#).

If you get authenticated using that token, it's fine; otherwise, request again and save the token again.