My app works pretty good without ProGuard but when using it, I always get
403 UsageLimits, Access Not Configured
errors from the Google Drive API.
I am using this ProGuard configuration. There are no Exceptions thrown – everything seems to work fine – just the requests fail.
Any ideas?
I just found the reason why it failed.
Not proguard is the issue. I genereated a SHA-Hash and entered it in the Google API Console for my app. The release version is signed with another keystore and I had to generate another SHA-Hash for this version.