How to adjust the padding of BottomNavigationBarItem in a Flutter page?

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There is no direct way to adjust the padding of BottomNavigationBarItem in Flutter. However, you can use the SizedBox widget to set the width and height of the icon and label in each BottomNavigationBarItem.

Here's an example:

BottomNavigationBar(
  items: [
    BottomNavigationBarItem(
      icon: SizedBox(
        width: 24,
        height: 24,
        child: Icon(Icons.home),
      ),
      title: SizedBox(
        height: 0, // set the height to 0 to remove the label
      ),
    ),
    BottomNavigationBarItem(
      icon: SizedBox(
        width: 24,
        height: 24,
        child: Icon(Icons.search),
      ),
      title: SizedBox(
        height: 0,
      ),
    ),
    BottomNavigationBarItem(
      icon: SizedBox(
        width: 24,
        height: 24,
        child: Icon(Icons.settings),
      ),
      title: SizedBox(
        height: 0,
      ),
    ),
  ],
),

In this example, the width and height of the icon are set to 24 using the SizedBox widget. The height of the label is set to 0 to remove it.

You can adjust the width and height values as per your requirement to achieve the desired padding.