CodeNameOne Google Plus OAuth2 - codenameone

Question

Could anyone please help me with authenticating to Google Plus using OAuth2? I am able to get the authentication window to display, login and confirm my application with my account, but for some reason the action event is never fired. I get a screen saying Please copy this code, switch to your application and paste it there.
How do i get the action event to fire?
Thanks in advance.
Edit:
My code is as follows:
Hi Shai, thanks for the response, my code for the authentication is as follows:
Oauth2 auth2 = new Oauth2("https://accounts.google.com/o/oauth2/auth", "Client_Id", "urn:ietf:wg:oauth:2.0:oob or http://localhost", "openid", "https://accounts.google.com/o/oauth2/token", "Client_Secret");
Oauth2.setBackToParent(true);
auth2.showAuthentication(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
if (evt.getSource() instanceof String) {
String token = (String) evt.getSource();
String expires = Oauth2.getExpires();
GOOGLE_TOKEN = token;
System.out.println("recived a token " + token + " which expires on " + expires);
//store token for future queries.
} else {
Exception err = (Exception) evt.getSource();
err.printStackTrace();
Dialog.show("Error", "An error occurred while logging in: " + err, "OK", null);
}
}
});
The "auth2.showAuthentication" works well, and allows you to pass through for the user to authorize the application but then once the user authorizes the application the "actionlistener" is never called, I never hit the callback. How can i force the callback to fire to return the token?

Answer 1

I have been struggling with the same issue. I finally found out that the problem lies in the setup of the WebBrowser inside Oauth2.createLoginComponent(): the onStart() handler waits for a URL starting with your supplied redirect URI, but this URL never appears. The final Google page, the one that brings the token, has a URL starting with "https://accounts.google.com/o/oauth2/approval?", not with the redirect URI.
According to Google's documentation the token will be supplied inside the page title, but this appears not to be the case with the native browser in CodeName One. I therefore ended up scraping the HTML document for an input with id="code", whose value is the token we're looking for. The scraping has to take place after the page has been loaded, i.e. in the onLoad() event, not in onStart().
Hope this helps, it worked for me.