Flutter Gradient Text - How to Apply Gradient Color for Text in Flutter?

Last updated Aug 15, 2021


In this flutter example we will create Gradient text in flutter. To apply gradient color for text we will use Shader .

Shader is a Base class for objects such as [Gradient] and [ImageShader] which correspond to shaders as used by [Paint.shader]

There are two ways to apply gradient for text

  • Shader
  • Shader Mask

 

Let's create Text Gradient

 

Flutter Text Gradient color

 

Text Gradient with Shader

First create Shader object with required colors

final Shader linearGradient = LinearGradient(
  colors: <Color>[Colors.red, Colors.yellow],
).createShader(
  Rect.fromLTWH(0.0, 0.0, 200.0, 70.0),
);

 

The apply shader object to Text widget by below code

Text(
  'Flutter Text Gradient Example!',
  textAlign: TextAlign.end,

  style: new TextStyle(
      fontSize: 32.0,
      fontWeight: FontWeight.bold,

      foreground: Paint()..shader = linearGradient),
),

 

 

How to apply gradient color for text

 

Now check the image above when the text goes from left to right the gradient color has changed why because we applied it with Rect

final Shader linearGradient2 = LinearGradient(
  colors: <Color>[Colors.red, Colors.yellow],
).createShader(
  Rect.fromLTWH(0.0, 0.0, 100.0, 170.0),
);

 

 

100 and 170 are fixed number, which would be magic numbers for a mobile screen. However, this doesn't scale and will give us headaches in the long term

 

Apply Gradient for Text with Shader Mask

Create gradient without rect

final gradient = LinearGradient(
  colors: <Color>[Colors.pink, Colors.green],
);

 

Now add Text widget inside ShaderMask widget

ShaderMask(
  shaderCallback: (Rect bounds) {
    return gradient.createShader(Offset.zero & bounds.size);
  },
  child: Center(
    child: Text(
      'Hello Gradients!',
      style: new TextStyle(
        color: Colors.white,
        fontSize: 60.0,
        fontWeight: FontWeight.bold,
      ),
    ),
  ),
)

 

Complete code

import 'package:flutter/material.dart';

void main(){
  runApp(TextGradient());
}
class TextGradient extends StatelessWidget{
  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      theme: ThemeData(
        primaryColor: Colors.pink
      ),
      home: Scaffold(

        appBar: AppBar(title: Text("Text Gradient"),),
        drawer: Drawer(

          child: Column(
            children: [
              UserAccountsDrawerHeader(

                currentAccountPicture: Icon(Icons.account_circle,color: Colors.white,size: 80,),

                accountName: Text(
                  'Flutter Text Gradient Inside Drawer!',
                ), accountEmail: null,
              ),
              SizedBox(height: 10,),
              Text(
                'Flutter Text Gradient Example!',
                style: new TextStyle(
                    fontSize: 48.0,
                    fontWeight: FontWeight.bold,
                    foreground: Paint()..shader = linearGradient),
              ),

            ],
          ),
        ),
        body: Container(
          child: Column(
            children: [
              Text(
                'Flutter Text Gradient Example!',

                style: new TextStyle(
                    fontSize: 32.0,
                    fontWeight: FontWeight.bold,
                    foreground: Paint()..shader = linearGradient2),
              ),
              Divider(color: Colors.black,height: 1,),
              SizedBox(height: 30,),
              Text(
                'Flutter Text Gradient Example!',
                textAlign: TextAlign.center,
                style: new TextStyle(
                    fontSize: 32.0,
                    fontWeight: FontWeight.bold,
                    foreground: Paint()..shader = linearGradient2),
              )
              , Divider(color: Colors.black,height: 1,),
              SizedBox(height: 30,),
              Text(
                'Flutter Text Gradient Example!',
                textAlign: TextAlign.end,

                style: new TextStyle(
                    fontSize: 32.0,
                    fontWeight: FontWeight.bold,

                    foreground: Paint()..shader = linearGradient2),
              ), Divider(color: Colors.black,height: 1,),
              ShaderMask(
                shaderCallback: (Rect bounds) {
                  return gradient.createShader(Offset.zero & bounds.size);
                },
                child: Center(
                  child: Text(
                    'Hello Gradients!',
                    style: new TextStyle(
                      color: Colors.white,
                      fontSize: 60.0,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }

  final gradient = LinearGradient(
    colors: <Color>[Colors.pink, Colors.green],
  );
  final Shader linearGradient = LinearGradient(
    colors: <Color>[Colors.pink, Colors.green],
  ).createShader(
    Rect.fromLTWH(0.0, 0.0, 200.0, 70.0),
  );

  final Shader linearGradient2 = LinearGradient(
    colors: <Color>[Colors.red, Colors.yellow],
  ).createShader(
    Rect.fromLTWH(0.0, 0.0, 100.0, 170.0),
  );
}

 

Conclusion: Here we have created Gradient Text with Shader class. There are many flutter dependencies to create gradient text.


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