flutter adding buttons at the bottim just before bottom navigation bar code example

Example 1: add botton at the bottom in flutter

Scaffold(
      bottomSheet:FlatButton(
      //button code
      ,)//scaffold

Example 2: change bottom navigation bar from button flutter

Having such functionality can decrease your thinking capabilities. If you still
want to here is the link you can check out.

https://medium.com/@theboringdeveloper/common-bottom-navigation-bar-flutter-e3693305d2d