'Remove default padding or margin on Bottom Navigation Bar from Flutter

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This is the picture of the problem, is it a default padding on Bottom Navigation Bar? If it is, how can I remove it?

As you can see in the code below, I have a container and a icon inside of the BottomNavigationBarItem, but there is a space between the icon and the bar.

return Scaffold(
      bottomNavigationBar: BottomNavigationBar(
        backgroundColor: Color.fromARGB(255, 18, 124, 157),
        items: <BottomNavigationBarItem>[
          BottomNavigationBarItem(
            activeIcon: Container(
              margin: EdgeInsets.all(0),
              padding: EdgeInsets.all(0),
              height: 50,
              width: 300,
              color: Color.fromARGB(255, 18, 124, 157),
              child: Icon(Icons.home, size: 40, color: Colors.white),
            ),
            icon: Container(
              margin: EdgeInsets.all(0),
              padding: EdgeInsets.all(0),
              height: 50,
              width: 300,
              color: Colors.white,
              child: Icon(Icons.home,
                  size: 40, color: Color.fromRGBO(114, 114, 114, 1)),
            ),


Solution 1:[1]

That space is reserved by the BottomNavigationBarItem text so you must set selectedFontSize to 0 in the BottomNavigationBar.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Ravindra S. Patil