public class MyBean implements Serializable, Parcelable {
}

@EActivity
public class MyActivity extends Activity {
    @Extra
    protected MyBean myBean;
}

public final class MyActivity_ extends MyActivity {
    ...
    public static class IntentBuilder_ {
        ...
        public MyActivity_.IntentBuilder_ myBean(MyBean myBean) {
            intent_.putExtra("myBean", myBean);
            return this;
        }
    }
}

public final class MyActivity_ extends MyActivity {
    ...
    public static class IntentBuilder_ {
        ...
        public MyActivity_.IntentBuilder_ myBean(MyBean myBean) {
            intent_.putExtras("myBean", (Parcelable) myBean);
            return this;
        }
    }
}