GWT: how do I go to a new place from within the Activity start method?

问题

So I'm doing something like this:

public class SecureActivity extends AbstractActivity {
  public void start(AcceptsOneWidget container, EventBus eventBus) {    
    if (!_app.isUserLoggedIn()) {
      _app.goTo(new LoginPlace(_app.getCurrentPlaceToken()))
    } else {
      // do cool secure stuff
    }
  }
}

But the behavior that I'm seeing is that my browser's history is for original url (from the original request), then the login:redirectPlace, and then original url again.

It seems like I need to do my redirection after the start() method has completed. Is there a proper way to delay/delegate that goTo to happen outside of the start method?

Thanks.

回答1:

That should be enough:

Scheduler.get().scheduleFinally(new ScheduledCommand() {
   @Override
   public void execute() {
      _app.goTo(new LoginPlace(_app.getCurrentPlaceToken());
   }
}

来源：https://stackoverflow.com/questions/8003229/gwt-how-do-i-go-to-a-new-place-from-within-the-activity-start-method