@App in @EBean is Null #481

I used an @app in @ebean，but it's Null.
I read the code:

public static HttpUtil_ getInstance_(Context context) {
if (instance_ == null) {
instance_ = new HttpUtil_(context.getApplicationContext());//here used activity's application
}
return instance_;
}

private HttpUtil_(Context context) {
context_ = context;
init_();
}

private void init_() {
if (context_ instanceof Activity) {//but here,the context is application,not activity. so the application is null;
Activity activity = ((Activity) context_);
application = ((SoApplication) activity.getApplication());
}
loginInfo = new LoginInfo_(context_);
}