Flutter – FloatingActionButton in the center

I don’t know if this was added since this question was first answered, but there’s now floatingActionButtonLocation property on the Scaffold class.

It would work like this in your original question:

class ContaPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) => new Scaffold(
    // ...

    floatingActionButton: new FloatingActionButton(
      // ...FloatingActionButton properties...
    ),

    // Here's the new attribute:

    floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
  );
}

Also see the documentation:

• Scaffold class (search floatingActionButtonLocation): https://docs.flutter.dev/flutter/material/Scaffold-class.html
• …and the FloatingActionButtonLocation class: https://docs.flutter.dev/flutter/material/FloatingActionButtonLocation-class.html