Flutter padding for all widgets?

You can use Padding, which is a very simple Widget that just takes another Widget as a child and an EdgeInsets object like the one you are already using as padding.

This approach of "composition over inheritance" in Flutter is very intentional. You can find a recent discussion of the pros and cons on Flutter's Gitter channel.

Here is a supplemental answer that provides some code. As the accepted answer states, you can use the Padding widget. Flutter is different than Android or iOS because Padding is a widget rather than a property. (It is a property of Container, but internally it is still a widget.)

This is a Text widget wrapped with a Padding widget.

Padding(  padding: const EdgeInsets.all(8.0),  child: Text("text"),);

See my fuller answer here.

If you are using Visual Studio Code, highlight your widget, click on the lightbulb, and select Wrap with Padding from the menu.

As you can see in the picture, it automatically wrapped the widget around a Padding widget.

@override  Widget build(BuildContext context) {    return Container(child: Padding(      padding: const EdgeInsets.all(8.0),      child: TextField(        decoration: InputDecoration(border: InputBorder.none, hintText: 'Enter a text'),      ),    ));  }