most common reason for
this is that the token has expired. The fix is
simple: call
<code><a href="../../reference/android/accounts/AccountManager.html#invalidateAuthToken(java.lang.String, java.lang.String)">AccountManager.invalidateAuthToken()</a></code> and
repeat the token acquisition dance one
more time.</p>

<p>Because expired tokens are such a common occurrence, and fixing them  is so easy, many
applications just assume the token has expired before even asking for it. If renewing a token is a
cheap op