Connection Fails, SIGN_IN_REQUIRED

[trippedout]

I just cloned this repository and opened it in Android Studio, built and ran it on my Nexus 6P, without making any changes, and when the account chooser pops up, no matter which account I choose, i get this error message immediately logged:

I/drive-quickstart: GoogleApiClient connection failed: ConnectionResult{statusCode=SIGN_IN_REQUIRED, resolution=PendingIntent{bd2ce36: android.os.BinderProxy@75a7137}, message=null}

Again, built straight from source, no changes, just doesn't work.

Also, the resolution intent is not handled in onActivityResult, so not sure what to do if this were to happen in production.

[Zo11]

You have to authorize the app. https://developers.google.com/drive/android/auth

Google needs to have the signature of your app before it allows changes in the drive. (Yes, the error message is misleading)

You can see an example of it being done here.

[mruijzendaal]

Is the OAuth 2.0 method shown in the linked youtube video the only way that works? For access to the AppFolder drive only, is OAuth 2.0 needed or is an API Key enough?

Also, isn't some kind of meta-data needed to be added to the manifest?