I'm trying to use the Google Data API for an installed application on Android 2.1. I don't want the user to have to enter their credentials if he already has an account configured on the device. Thus, I'm using the AccountManager with Account type "com.google".
But where to go from there? There are no samples from Google on how to do Google authentication (authTokenType etc.). There's a project trying to do it (http://code.google.com/p/google-authenticator-for-android) in a general way but without any success, yet.
Can it be so hard? This is really keeping back applications like Google Reader clients which have to ask the user for their Google credentials (which hopefully nobody gives them).
Any pointers/advice is appreciated.