Why is AccountAuthenticator#getAuthToken() not called?

Question

I created my own Android account authenticator by extending AbstractAccountAuthenticator and implementing addAccount() and getAuthToken(). Some of the methods in it are call

Answer 1

Your comment cleared things up immensely -- if you set the auth token for the account, then your getAuthToken method will not be called until the token is invalidated. You generally do this by calling invalidateAuthToken upon receiving a 401 or 403 or what have you from the web service.

From the Javadoc for the getAuthToken methods:

If a previously generated auth token is cached for this account and type, then it is returned. Otherwise, if a saved password is available, it is sent to the server to generate a new auth token. Otherwise, the user is prompted to enter a password.

Since your token is in the cache, it is returned directly and your authenticator is not consulted.