Create a Circular Progress Indicator with Linear Gradient in Flutter

Create a Circular Progress Indicator with Linear Gradient in Flutter

Alright, buckle up, buddy! We're gonna learn how to add a slick linear gradient to a CircularProgressIndicator in good ol' Flutter. Here's a step-by-step guide to help ya out.

Linear Gradient and CircularProgressIndicator Fun Time

Let's dive right in and see what we need to create this bad boy!

Basic LinearGradient Syntax

LinearGradient, in Flutter, allows you to create smooth transitions of colors along a straight line. Here's a basic example of how it works:

Tools Required

To build this rad app, make sure you have the following tools installed:

1. Visual Studio Code or Android Studio (pick your poison!)
2. Android Emulator, iOS Simulator, or a Physical Device (you need something to run your app on)
3. Flutter (duh!)
4. Flutter plugin for VS Code or Android Studio

Step-by-Step Implementation

Here's a simple breakdown of what you'll do:

Step 1: Create a New Project in Android Studio

If you haven't already, create a new Flutter project in Android Studio. For more detailed instructions, check out Android Studio Setup for Flutter Development and Creating a Simple Application in Flutter.

Step 2: Import the Necessary Packages

Import the required packages for your app, like material.dart.

Step 3: Execute the Main Method

The heart of your app starts here. Give it a good old fashioned kick-start!

Step 4: Create a MyApp Class

Create a MyApp class and define your app's theme and structure.

Step 5: Create a Custom Widget

This is where the magic happens! Create a CircularLinearGradient widget that combines LinearGradient and CircularProgressIndicator.

Now, you won't find a direct way to combine LinearGradient and CircularProgressIndicator, but don't worry, mate. We're gonna do it the cowboy way: using a CustomPaint. Here's a basic example:

```dartclass CircularLinearGradient extends StatelessWidget { final AlignmentGeometry alignment; final List

CircularLinearGradient({ Key? key, required this.alignment, required this.colors, required this.radius, }) : super(key: key);

@override Widget build(BuildContext context) { return CustomPaint( painter: CircularGradientPainter( alignment: alignment, colors: colors, radius: radius, ), child: Container( width: radius * 2, height: radius * 2, ), ); }}

class CircularGradientPainter extends CustomPainter { final AlignmentGeometry alignment; final List

CircularGradientPainter({ required this.alignment, required this.colors, required this.radius, });

@override void paint(Canvas canvas, Size size) { final Paint paint = Paint() ..style = PaintingStyle.fill;

}

double getColorOpacity(Color color, double radius, Size size) { final opacity = (radius / size.height); return color.withOpacity(opacity); }

List

@override bool shouldRepaint(covariant CustomPainter oldDelegate) => false;}```

Now you can use CircularLinearGradient in your app to get a linear gradient with a CircularProgressIndicator effect! Play around with the alignment, colors, and radius to achieve your desired look.

Go on, unleash that creativity, partner! The code is waiting for you. May the Flutter be with you. 🤘

Incorporating technology, we'll utilize a CustomPaint to combine LinearGradient and CircularProgressIndicator in our app, creating a unique CircularLinearGradient widget.

For the CircularLinearGradient implementation, we'll be using various packages, such as , and implement a custom painter with functions like and to create our desired effect.

Read also: