Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial![](https://ecs-static.teamtreehouse.com/assets/views/marketing/shared/community-banner-white-47072046c51352fe6a69f5e691ff5700b28bb11d45197d7bdf066d9ea3f72d0c.webp)
![Tonnie Fanadez](https://secure.gravatar.com/avatar/b148c4e97cd7cf211d4b0c417a0e436a?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Tonnie Fanadez
UX Design Techdegree Graduate 22,796 PointsToggle on Checkbox
doesn't mCheckboxes[i].toggle() set the Checkbox to its oppossite checked state i.e. if the checkbox was unchecked before screen rotation it will be checked after the rotation.
1 Answer
![Seth Kroger](https://secure.gravatar.com/avatar/b5bdc43c1e576145fb404edba6fea5a6?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Seth Kroger
56,413 PointsThe activity and any fragment attached to it would be destroyed and re-created from scratch on a rotation. The checkboxes are created dynamically each time we create the fragment and they don't have any static id. All the checkboxes after rotation will start out as unchecked, and this is why we use the instance state to re-check those boxes.
Tonnie Fanadez
UX Design Techdegree Graduate 22,796 PointsTonnie Fanadez
UX Design Techdegree Graduate 22,796 PointsThanks Seth Kroger, much appreciated.