如何使MPAndroid饼图中的切片成为梯度？

import android.graphics.Color;
import android.graphics.LinearGradient;
import android.graphics.Shader;
import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.data.PieEntry;
import com.github.mikephil.charting.utils.ColorTemplate;
import com.github.mikephil.charting.utils.MPPointF;
import com.github.mikephil.charting.utils.Utils;
import com.github.mikephil.charting.renderer.PieChartRenderer;

// 自定义Renderer
public class CustomPieChartRenderer extends PieChartRenderer {

    public CustomPieChartRenderer(PieChart chart, boolean animate) {
        super(chart, animate);
    }

    @Override
    protected void drawDataSet(Canvas c, IPieDataSet dataSet) {
        ...
        // 获取饼图的数据集和颜色集合
        List<PieEntry> entries = dataSet.getEntriesForValues();
        List<Integer> colors = dataSet.getColors();

        // 计算渐变的颜色
        int startColor = colors.get(0);
        int endColor = colors.get(colors.size() - 1);
        int[] gradientColors = calculateGradientColors(startColor, endColor, entries.size());

        // 遍历每个切片
        for (int j = 0; j < entries.size(); j++) {
            ...
            // 设置切片颜色为渐变色
            dataSet.setColors(gradientColors[j]);
            ...
        }
        ...
    }

    // 计算渐变的颜色
    private int[] calculateGradientColors(int startColor, int endColor, int count) {
        int[] gradientColors = new int[count];

        float[] startHSV = new float[3];
        float[] endHSV = new float[3];
        Color.colorToHSV(startColor, startHSV);
        Color.colorToHSV(endColor, endHSV);

        float stepValue = 1f / count;
        float currentHue = startHSV[0];

        for (int i = 0; i < count; i++) {
            float[] hsv = new float[]{currentHue, startHSV[1], startHSV[2]};
            gradientColors[i] = Color.HSVToColor(hsv);

            // 计算下一个颜色的Hue值
            currentHue += stepValue * (endHSV[0] - startHSV[0]);
        }

        return gradientColors;
    }
}

// 应用自定义Renderer
PieChart pieChart = findViewById(R.id.pie_chart);
CustomPieChartRenderer customRenderer = new CustomPieChartRenderer(pieChart, pieChart.isAnimate());
pieChart.setRenderer(customRenderer);