I am using db4o database for storing data in my Android application. I want to sort objects on Number field.
But, when I use query.descend("number").orderDescending();
, I am getting NullPointerException
.
Why?
Finally, solved problem.
Actually the problem was number was stored in format double exponential. Then I converted the number in long and the problem is gone :-)
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.