Hello, i tried usin your code, adn i have an issue with DetailPage parameter:

const DetailPage({Key key, this.charInfo}) : super(key: key);

this 2 always require non null parameter, when i tried Key? key, require this.charInfo, the apps wont run with error:
Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

Do u know how to solved it?
Tahnk you in advance