I'm making an Android's app using Spotify SDK and Spotify Web Api Android from kaaes. What's the best way to refresh my access token? Since i need to keep the user logged.
I don't want that my app ask for log in everytime the users open the app.
How can I handle this ?
retrofit.RetrofitError: 401 Unauthorized
Login to Spotify failed because of invalid credentials
Thanks for your time and help! Regards.
You need to use the Authorization Code flow from the Spotify Web API to obtain a refresh token that you can use to obtain a new access token when yours expires.
For that you need to have a web service with which you communicate from the Android app.
There is more information on this on https://github.com/spotify/android-sdk/issues/47
In case anyone else is having trouble with this issue, I made a gist you can use to stand up a free cloud function and handle this process:
https://gist.github.com/rldaulton/8b87216715d3cea828b5a9b27e300a3f
来源：https://stackoverflow.com/questions/30085038/how-to-refresh-access-token-on-spotify-sdk-for-android