I’m developing an application with Flutter. But there is a problem. When I Hot Reload, the application starts from the beginning.

hello everyone i hope your doing great<
so my problem is that when i build my app in release mode my appbar doesn’t show up,bottom bar and some texts in thoes chips like u see in the app screen
and when im building my app i get this error can this be the cause of my issue if its how can i fix it if not whats the issue and what can i do about it please i have been trying to fix this issue for a week but nothing worked .

I have tried a lot of ways to open a pdf
in default local app for android and iOS but there was no
solutions (example –> when user click on the pdf in my app I want to redirect him to the default app with the selected pdf form my app)

I am using TabBarView and in children, I have GridView.List(), when I Use Expand(), it gives me the error of

I’m working on the following interface with Flutter:

I am developing a mobile app and currently working on the onboarding screen, which consists of 3 introductory screens. The skip button on my onboarding screen is not responding at all. I have tried several solutions, including wrapping the button with different widgets (Container, TextButton, GestureDetector), but none of them have resolved the issue.

Here’s the page, as you can see, some special SizedBox do have different controller to handle different input from the user. However, when I write into the email or the password, or the password confirm, it prints as well into the two others, but it doesn’t do that for the controller.name one. I have no clue how to fix it.

I’m working on a date picker based on ListWheelScrollView .

enter image description hereI need a design like this for my own application, thank you for your help.
I’m designing a language learning app.
I would like to thank those who will help me with such a design.
It is very important for me to keep the design as it is. If you want detailed information, you can contact me.
Flutter , Dart, Mobil Dev.

i’m trying to implemment mention function for my app like FB,Zalo, whatsapp. I’m almost done using the flutter_mentions library. Except i can’t figure out how to implement this function “a user can only be tagged once”.
when user A is mentioned, then we can’t mention duplicate A. So how to implement such a function? Thanks
I’m trying to delete user mention has been chosen on onSearchChanged, but after that an user mention before has been remove from markup too(missing blue highlight). You can see this in my attach image.