在Android中绘制饼图？

// 创建一个自定义View来绘制饼图
public class PieChartView extends View {
    private Paint paint;
    private RectF rectF;
    private List<Float> data;
    private List<Integer> colors;

    public PieChartView(Context context) {
        super(context);
        init();
    }

    public PieChartView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    private void init() {
        paint = new Paint();
        paint.setAntiAlias(true);
        rectF = new RectF();
        data = new ArrayList<>();
        colors = new ArrayList<>();
    }

    // 设置饼图的数据和颜色
    public void setData(List<Float> data, List<Integer> colors) {
        this.data = data;
        this.colors = colors;
        invalidate(); // 刷新视图
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        float total = 0;
        for (float value : data) {
            total += value;
        }

        float startAngle = 0;
        for (int i = 0; i < data.size(); i++) {
            float sweepAngle = 360 * (data.get(i) / total);

            paint.setColor(colors.get(i));
            rectF.set(0, 0, getWidth(), getHeight());
            canvas.drawArc(rectF, startAngle, sweepAngle, true, paint);

            startAngle += sweepAngle;
        }
    }
}