Login and Logout seems inconsistent.

[pedroliman]

Login and Logout functions should be revised:

Facebook photo keeps showing up after loging in anonymously:

• Login with facebook, and logout;
• Login anonymously;
• The last picture is still there.

Also, the facebook button sometimes is not there, which is strange to the user.

[pedroliman]

The problem "the facebook button sometimes is not there, which is strange to the user" is there. Even if I restart the Avalia Brasil App, the loggin screen won't show facebook button:

I had just logged off my facebook account, and that happens:

You should check LoginActivity.java:124 - 127 to fix this. If you loggout Avalia Brasil, that doesn't means that the variable accessToken is null!

I've debugged it, and Avalia Brasil loggout maintains the accessToken variable!!