FloatingActionButton and Icon Button in flutter | Flutter FloatingActionButton | flutter Icon button

Flutter - Using IconButton Example This tutorial shows you how to use IconButton in Flutter.

In Flutter IconButton is a widget that prints a picture (icon) on top of Material widget. As a button, you can define a function that will be executed when the button is pressed. It's also possible to customize the look and touch effects for the button.

For this tutoial, we are going to create a simple button for toggling Bluetooth, starting from the most basic usage, then add some customizations.

IconButton is available to use by importing 'package:flutter/material.dart'. Most likely, you've already imported that library. To create an IconButton, just call the constructor. There are two required parameters: icon and onPressed. icon is the icon to be displayed, it must be a Widget, usually an Icon. onPressed is a callback function called when the button is tapped

IconButton class A material design icon button.

An icon button is a picture printed on a Material widget that reacts to touches by filling with color (ink).

Icon buttons are commonly used in the AppBar.actions field, but they can be used in many other places as well.

If the onPressed callback is null, then the button will be disabled and will not react to touch.

Requires one of its ancestors to be a Material widget.

The hit region of an icon button will, if possible, be at least kMinInteractiveDimension pixels in size, regardless of the actual iconSize, to satisfy the touch target size requirements in the Material Design specification. The alignment controls how the icon itself is positioned within the hit region.

Adding a filled background Icon buttons don't support specifying a background color or other background decoration because typically the icon is just displayed on top of the parent widget's background. Icon buttons that appear in AppBar.actions are an example of this.

It's easy enough to create an icon button with a filled background using the Ink widget. The Ink widget renders a decoration on the underlying Material along with the splash and highlight InkResponse contributed by descendant widget

Buttons: floating action button A floating action button (FAB) represents the primary action of a screen. Using FABs A FAB performs the primary, or most common, action on a screen. It appears in front of all screen content, typically as a circular shape with an icon in its center.

Before you can use Material FABs, you need to import the Material Components package for Flutter:

package:flutter/material.dart. You need to be using a MaterialApp.

For more information on getting started with the Material for Flutter, go to the Flutter Material library page.

Making FABs accessible Flutter's APIs support accessibility setting for large fonts, screen readers, and sufficient contrast. For more information, go to Flutter's accessibility and internationalization pages.

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