Use case/Problem

I couldn't find a native way to add badges to icons without doing some workaround with extra widgets. This seem to be allowed by the material design guidelines and they even show examples using it. Material design badging

I also found some open issues related with this topic, such as Add support for Badges on BottomNavigationBarItems.

Proposal

Extend Icon() API adding a badge like the follow example:

Icon.badge(
	Icons.settings, 
	badge: Badge(
		visible: true,
		type: BadgeType.numeric,
		maxValue: 20
		value: 10),
);

Where the type would be enum with values like:

enum BadgeType {
	numeric,
	boolean,
}

In case of boolean

the badge only would display the single point at the corner of the Icon as follows.

In case of numeric

the badge would show the given value (or the max value with the + suffix if the value surpasses it)