Flutter Game extreme slow

[Robert Fijow]

Im writing a TokenHunting game.
Im Having problem mixing QRCode reader and Google Maps on the same XamarinForms app then some days ago switched to Flutter, Im completely new to it and just started learning it.
After a lot of research I reach on the result below but it is really slow and with a black screen between screen transitions, Im almost sure that i did something wrong.
Im open to sugestions.

TokenHunter PASTEBIN source code

Same question on a site where people aren't as nice as ones here!

[Giovanni Montano]

Robert Fijow wrote:Im writing a TokenHunting game.
Im Having problem mixing QRCode reader and Google Maps on the same XamarinForms app then some days ago switched to Flutter, Im completely new to it and just started learning it.
After a lot of research I reach on the result below but it is really slow and with a black screen between screen transitions, Im almost sure that i did something wrong.
Im open to sugestions.

TokenHunter PASTEBIN source code

Same question on a site where people aren't as nice as ones here!

Are you using an emulator or a real device?