SfCircularChart supports three gradient types: linear, sweep, and radial. Follow these steps to achieve those gradients in our chart using the onCreateShader event. The data points of pie, doughnut and radial bar charts can be filled with three types of gradient such as Gradient.linear, Gradient.sweep and Gradient.radial. All the data points in the circular chart are together considered as a single segment and the shader is applied commonly.
Documentation: https://help.syncfusion.com/flutter/circular-charts/circular-series-customization#gradient-and-image-shader
To run this application, you need to first clone or download the ‘flutter pie chart gradient fill’ repository and open it in your preferred IDE. Then, build and run your project to view the output.
For more help, check the Syncfusion Flutter documentation, or Flutter documentation.