MyPhoneKeys.price_without_discount], );(我的屏幕显示数据= null){ id = value!.id!;
is_new = value!.is_new!我想得到数据,并显示在旋转木马滑翔机(我会添加),但得到零。错误是说Null is not subtype of String and
= null) return null;
public void setSchoolFaculty(Key= null){ student.setSchoolFaculty(Key.create(SchoolFaculty.class,getDepartment().getSchoolFaculty()));}// this is the line throws a null pointer Ex