Как изменить размер иконки flutter

Flutter icon button size customization. In this post, I’ll demonstrate how to customize the Flutter icon button size using a straightforward but proper and easy Flutter example. I will need you to carefully look and pay attention to every detail at what I have written while you familiarize yourself with the strategy for customizing Flutter icon button size in your own Flutter apps as well. In that case, why squander more time. Let’s get right to modifying our Flutter icon button size.

Outline

1. What is Flutter Icon Button Size?
2. Default Flutter Icon Button Size
3. Change Flutter Icon Button Size
4. Flutter Icon Button Size Implementation Source Code
5. Conclusion

What is Flutter Icon Button Size?

In this post we will understand how to change the Flutter icon button size means we will increase and decrease the icon size which will ofcourse change the size of the Flutter icon button. First we will see the default Flutter icon button size then we will change it using an easy Flutter example.

Default Flutter Icon Button Size

So to see the default Flutter icon button size, we only have to implement a simple Flutter icon button widget with required onPressed and icon constructors. We also have wrapped the icon button with Flutter container widget and gave it color so we can see the whole Flutter icon button. See the below code:

Container(
            color: Colors.blue,
            child: IconButton(
              onPressed: () {},
              icon: Icon(Icons.email, color: Colors.white),
            ),
          )

IconButton(
              iconSize: 100,
              onPressed: () {},
              icon: Icon(Icons.email, color: Colors.white),
            )

import 'package:flutter/material.dart';
void main() {
  runApp(const MyApp());
}
class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Homepage(),
    );
  }
}
class Homepage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
            body: Center(
      child: Row(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Container(
            margin: EdgeInsets.all(10),
            color: Colors.blue,
            child: IconButton(
              iconSize: 80,
              onPressed: () {},
              icon: Icon(Icons.email, color: Colors.white),
            ),
          ),
          Container(
            margin: EdgeInsets.all(10),
            color: Colors.blue,
            child: IconButton(
              iconSize: 50,
              onPressed: () {},
              icon: Icon(Icons.email, color: Colors.white),
            ),
          ),
          Container(
            margin: EdgeInsets.all(10),
            color: Colors.blue,
            child: IconButton(
              iconSize: 15,
              onPressed: () {},
              icon: Icon(Icons.email, color: Colors.white),
            ),
          ),
        ],
      ),
    )));
  }
}

Icon Widget is the primary way of introducing Icons in Flutter. and  IconButton Widget acts just like a button, but with an icon instead of a usual button. so in this article, we will discuss how to resize an Icon / Icon Button in Flutter?

Let’s get started with the same.

How to Resize an Icon / Icon Button In Flutter?

You can use size property for Icon. Code Snippet will look like the below:

You can use size property for Icon.

Icon(
  Icons.radio_button_checked,
  size: 12,
),

And for IconButton you can use

Transform.scale(
  scale: 0.5,
  child: IconButton(
    onPressed: (){},
    icon: new Image.asset("images/IG.png"),
  ),
),

IconButton(
              onPressed: () {},
              icon: const Icon(Icons.account_box),
              iconSize: 50,
            ),

You can also try the below way:

new SizedBox(
   height: /*calculate from width and no:of child*/,
   width: /*calculate from width and no:of child*/,
   child: new IconButton(
      padding: new EdgeInsets.all(0.0),
      icon: new Image.asset("images/IG.png"),
      onPressed: null,
   )
)

Below code set width & height for the IconButton and make it to the center of your Container Widget.

Container(
           height: 18.0,
           width: 18.0,
           color: Colors.yellow,
           child: new IconButton(
             padding: new EdgeInsets.all(0.0),
             color: Colors.red,
             icon: new Icon(Icons.clear, size: 18.0),
             onPressed: null,
           )
       )

Example:

 return Scaffold(
      appBar: AppBar(
        title: const Text("Icon Size Example"),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          const Text("Small size Icon"),
          const Icon(
            Icons.home_filled,
            size: 40,
          ),
          const SizedBox(
            height: 40,
          ),
          const Text("This is Icon Button"),
          Center(
            child: Container(
              color: Colors.grey,
              width: 100,
              height: 50,
              child: IconButton(
                onPressed: () {
                  Fluttertoast.showToast(
                    msg: "Icon Button Clicked",
                  );
                },
                icon: const Icon(Icons.change_circle_outlined),
                iconSize: 35,
              ),
            ),
          ),
        ],
      ),
    );

We will get output like the below:

Output:

Conclusion:

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Row(
                        mainAxisSize: MainAxisSize.max,
                        children: <Widget>[
                          IconButton(
                            icon: new Image.asset("images/IG.png"),
                          ),
                          IconButton(
                            icon: new Image.asset("images/Twitter.png"),
                          ),
                          IconButton(
                            icon: new Image.asset("images/Fb.png"),
                          ),
                        ],
                      )

3 ответа

Лучший ответ

Icon(
  Icons.radio_button_checked,
  size: 12,
),

Transform.scale(
  scale: 0.5,
  child: IconButton(
    onPressed: (){},
    icon: new Image.asset("images/IG.png"),
  ),
),

new SizedBox(
   height: /*calculate from width and no:of child*/,
   width: /*calculate from width and no:of child*/,
   child: new IconButton(
      padding: new EdgeInsets.all(0.0),
      icon: new Image.asset("images/IG.png"),
      onPressed: null,
   )
)

Row(
                        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                        children: <Widget>[
                          Image.asset("images/line.png", width: 30,),
                          SizedBox(width: 5,),
                          Image.asset("images/Wa.png", width: 30,),
                          SizedBox(width: 5,),
                          Image.asset("images/IG.png", width: 30,),
                          SizedBox(width: 5,),
                          Image.asset("images/Twitter.png", width: 30,),
                          SizedBox(width: 5,),
                          Image.asset("images/Fb.png", width: 30,),

                        ],

  ImageIcon(AssetImage("images/Free Ongkir.png")),

In this example, we are going to show you how to add icons to your Flutter app. You will also learn to change the size, color, or icon as well as to add icon buttons, and make the default icon clickable in your Flutter App. See the examples below:

Icon(Icons.print)

You can use Icon() widget to add icons to your Flutter App. You have to pass the icon data as an icon to this widget. You can use default available Material icons with Icons class.

Read This Aso: How to Use Font Awesome Icons in Flutter App

Icon(Icons.message,
    size: 50, 
    color: Colors.red
)

To resize the icon size and change the icon color, you have to pass the size and color value along with icon data to Icon() widget.

InkWell(
  child: Icon(Icons.link),
  onTap: (){
      //action code when clicked
      print("The icon is clicked");
  },
)

You can wrap Icon() widget with InkWell or alternatively GestureDetector() widget to make icons clickable in your Flutter app.

IconButton(
  onPressed: (){
      //action coe when button is pressed
  }, 
  icon: Icon(Icons.send),
)

You can use IconButton() widget to add the Icon button in your flutter app. 

ElevatedButton.icon(
  onPressed: (){

  }, 
  icon: Icon(Icons.phone), 
  label: Text("Elevated Button")
)

You can use ElevatedButton.icon() widget to add icon to your Elevated button.

import 'package:flutter/material.dart';

void main(){
  runApp(MyApp());
}

class MyApp extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Home(),
    );
  }
}


class Home extends StatefulWidget{
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    
    return  Scaffold(
          appBar: AppBar( 
              title: Text("Add Icon in Flutter"),
          ),
          body: Container(
            padding: EdgeInsets.all(20),
            alignment: Alignment.center,
             child: Column(
               children:[
                   
                  //add default icon
                  Icon(Icons.print),

                  //resize and add color to icon
                  Icon(Icons.message,
                      size: 50, 
                      color: Colors.red
                  ),

                  //make Icon Clickable
                  InkWell(
                    child: Icon(Icons.link),
                    onTap: (){
                        //action code when clicked
                        print("The icon is clicked");
                    },
                  ),

                  //add Icon Button
                  IconButton(
                    onPressed: (){
                        //action coe when button is pressed
                    }, 
                    icon: Icon(Icons.send),
                  ),

                  //add elevated button with icon
                  ElevatedButton.icon(
                    onPressed: (){

                    }, 
                    icon: Icon(Icons.phone), 
                    label: Text("Elevated Button")
                  ),  
                   
               ]
             ),
          )
       );
  }
}

In this example, we have added icons in different ways, such as plain icon, clickable icon, button with icon, elevated button with icon.

In this way, you can add icons to your Flutter app.