How to set size to FloatingActionButton

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I'm trying to set a size to a FloatingActionButton in flutter, I wanna set width/height, I mean, make the button bigger, I was looking for a circular button, but the only one that I got was this one, so, I started to work with this, but I need it a little bigger.

Use a Container where you can specify width and height, then use a RawMaterialButton, like this:

myFabButton = Container(
      width: 200.0,
      height: 200.0,
      child: new RawMaterialButton(
        shape: new CircleBorder(),
        elevation: 0.0,
        child: Icon(
          Icons.favorite,
          color: Colors.blue,
         ),
      onPressed: (){},
  );

Adjust icon size of Floating action button (fab), This will set 36dp size for all icons for floating action button. Updates As Per Comments. If you want to set icon size to particular Floating Action  How to Adjust Icon Size of Floating Action Button in Android Android material design specifications have the default icon size of floating action button in android as 24 x 24 dp. There are cases when you will like to add icon with a different size to Android FAB button.

wrap your FAB with a FittedBox inside a Container or SizedBox and then change the width and the height of it.

example :

floatingActionButton: Container(
        height: 100.0,
        width: 100.0,
        child: FittedBox(
          child: FloatingActionButton(onPressed: () {}),
        ),
      ),

How to change Floating Action Button Size in Android, In android, there are different ways to change floating action button size in android. We will show the code snippet for each method below. Using dimens.​xml In android, there are different ways to change floating action button size in android. We will show the code snippet for each method below. Using dimens.xml file. In your android project values directory, we will create a dimens.xml file which we can use to override the default android attributes values.

Use a SizedBox

SizedBox(
  width: 200.0,
  height: 200.0,
  child: FloatingActionButton(
    onPressed: () {},
  ),
)

How to Adjust Icon Size of Floating Action Button in Android, Android material design specifications have the default icon size of floating action button in android as 24 x 24 dp. There are cases when you will like to add Floating action button comes into two sizes – (1) Default and (2) mini. You can set size using fabSize attribute. Attributes of Android Floating Action Button Widget. Some of the popular attributes of android Floating Action Button widget are –

You can wrap your button with a Transform.scale() widget:

  floatingActionButton: Transform.scale(
    scale: 1.5,
    child: FloatingActionButton(onPressed: () {}),
  )

Buttons: floating action button, A floating action button (FAB) represents the primary action for a screen. This fixed extended FAB's width is defined by the cumulative width of the icon, text  The FloatingActionButton can be sized either by using the discrete sizing modes or a custom size. There are three app:fabSize modes: normal - the normal sized button, 56dp. mini - the mini sized button, 40dp. auto (default) - the button size will change based on the window size. For small sized windows (largest screen dimension < 470dp) this will select a mini sized button, and for larger sized windows it will select a normal sized button.

RawMaterialButton(
  elevation: 2.0,
  shape: CircleBorder(),
  fillColor: Colors.red,
  onPressed: (){},
  child: Icon(
    Icons.add,
    color: Colors.white,
    size: 20.0,
  ),
  constraints: BoxConstraints.tightFor(
    width: 56.0,
    height: 56.0,
  ),
)

BY this way .. you can add any type of button.

Floating action buttons, A floating action button (FAB) represents the primary action of a screen. Or, you can set a custom size via the app:fabCustomSize attribute. If set, app:fabSize  how to increase the size of icon inside floating action button ????? I'm trying to put plus icon inside floating action button. I have tried with 48dp, 72dp, 96dp icons, but still the icon is

A Deep Dive Into FloatingActionButton in Flutter, In material design, the FAB has two sizes: default and mini. To switch to a mini size, set mini in the constructor to true. floatingActionButton:  "app" is usually a namespace for every attribute that's not defined by the android platform (which have "android" prefix"). ||| According to FloatingActionButton source fabSize is either 0 for normal size or 1 for mini size.

FloatingActionButton icon size too small · Issue #143 · mikepenz , but the icon is too small.. even when i increase the sizeDp value. the xml of fab has layout width and height set to 30dp. Do you have defined any padding? If you define the size of the IconicsDrawable to 16dp the drawable itself will be that size. But that must not mean that the ImageView will display it exactly like this if you have defined a scaleType or if there is any padding on that view

How to set size to FloatingActionButton, Use a Container where you can specify width and height , then use a RawMaterialButton , like this: myFabButton = Container( width: 200.0,  If you want to set size to FloatingActionButton in Flutter? Use a Container where you can specify width and height, then use a RawMaterialButton, like below example: 1

Comments
  • There is no right and wrong answer, but imho I think this is the 'best' answer.
  • Does this method cause any loss of image quality while scaling the widget? Or is it vectoral?
  • This answer is more aligned with the philosophy of the framework
  • Even without a fitted box, the solution works fine.
  • Increasing the scale factor will make button get cut from the sides.
  • Yes. This method does not change the center point of the button, so if the scale is too big, the sides get cut.
  • By contrast, FittedBox not only scales, it also positions the child.
  • another option is to use - CircleAvatar( radius: 42.0, child: Icon(Icons.add), it has radius parameter.