java - SetId()，然后在java中以编程方式findviewById

Question

嗨，我正在尝试以编程方式 setId，但问题是如何在 java 中设置后找到该 id。我在 fragments (Viewpager) 工作下面是我的代码。

property=new SearchableSpinner(getActivity());
city.setId(R.id.citybuy);
town.setId(R.id.townbuy);
property.setId(R.id.propertybuy);

 city = (SearchableSpinner) this.view.findViewById(R.id.citybuy);
  town = (SearchableSpinner) this.view.findViewById(R.id.townbuy);
 property = (SearchableSpinner) this.view.findViewById(R.id.propertybuy);

但没有找到id并显示NullPointerException如果我 set id通过XML然后它显示这个 error :

java.lang.IllegalArgumentException: Wrong state class, expecting View State but received class gr.escsoft.michaelprimez.searchablespinner.SearchableSpinner$SavedState instead. This usually happens when two views of different type have the same id in the same hierarchy..This view's id is id/city_wanted. Make sure other views do not use the same id

尽管id's全部不同fragments XML

Answer 1

我相信您正在将 id 设置为 xml 中的 View ，现在您又将相同的 id 设置为同一 View 。