Android仿支付宝上芝麻信用分雷达图

public class CreditScoreView extends View {

 //数据个数
 private int dataCount = 5;
 //每个角的弧度
 private float radian = (float) (Math.PI * 2 / dataCount);
 //雷达图半径
 private float radius;
 //中心X坐标
 private int centerX;
 //中心Y坐标
 private int centerY;
 //各维度标题
 private String[] titles = {"履约能力", "信用历史", "人脉关系", "行为偏好", "身份特质"};
 //各维度图标
 private int[] icOns= {R.mipmap.ic_performance, R.mipmap.ic_history, R.mipmap.ic_contacts,
   R.mipmap.ic_predilection, R.mipmap.ic_identity};
 //各维度分值
 private float[] data = {170, 180, 160, 170, 180};
 //数据最大值
 private float maxValue = 190;
 //雷达图与标题的间距
 private int radarMargin = DensityUtils.dp2px(getContext(), 15);
 //雷达区画笔
 private Paint mainPaint;
 //数据区画笔
 private Paint valuePaint;
 //分数画笔
 private Paint scorePaint;
 //标题画笔
 private Paint titlePaint;
 //图标画笔
 private Paint iconPaint;
 //分数大小
 private int scoreSize = DensityUtils.dp2px(getContext(), 28);
 //标题文字大小
 private int titleSize = DensityUtils.dp2px(getContext(), 13);

 ...

 @Override
 protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  //雷达图半径
  radius = Math.min(h, w) / 2 * 0.5f;
  //中心坐标
  centerX = w / 2;
  centerY = h / 2;
  postInvalidate();
  super.onSizeChanged(w, h, oldw, oldh);
 }

 ...
}

/**
 * 绘制多边形
 *
 * @param canvas 画布
 */
private void drawPolygon(Canvas canvas) {
 Path path = new Path();
 for (int i = 0; i 

/**
 * 获取雷达图上各个点的坐标
 *
 * @param position 坐标位置（右上角为0，顺时针递增）
 * @return 坐标
 */
private Point getPoint(int position) {
 return getPoint(position, 0, 1);
}

/**
 * 获取雷达图上各个点的坐标（包括维度标题与图标的坐标）
 *
 * @param position 坐标位置
 * @param radarMargin 雷达图与维度标题的间距
 * @param percent  覆盖区的的百分比
 * @return 坐标
 */
private Point getPoint(int position, int radarMargin, float percent) {
 int x = 0;
 int y = 0;

 if (position == 0) {
  x = (int) (centerX + (radius + radarMargin) * Math.sin(radian) * percent);
  y = (int) (centerY - (radius + radarMargin) * Math.cos(radian) * percent);

 } else if (position == 1) {
  x = (int) (centerX + (radius + radarMargin) * Math.sin(radian / 2) * percent);
  y = (int) (centerY + (radius + radarMargin) * Math.cos(radian / 2) * percent);

 } else if (position == 2) {
  x = (int) (centerX - (radius + radarMargin) * Math.sin(radian / 2) * percent);
  y = (int) (centerY + (radius + radarMargin) * Math.cos(radian / 2) * percent);

 } else if (position == 3) {
  x = (int) (centerX - (radius + radarMargin) * Math.sin(radian) * percent);
  y = (int) (centerY - (radius + radarMargin) * Math.cos(radian) * percent);

 } else if (position == 4) {
  x = centerX;
  y = (int) (centerY - (radius + radarMargin) * percent);
 }

 return new Point(x, y);
}

/**
 * 绘制覆盖区域
 *
 * @param canvas 画布
 */
private void drawRegion(Canvas canvas) {
 Path path = new Path();

 for (int i = 0; i 

/**
 * 绘制分数
 *
 * @param canvas 画布
 */
private void drawScore(Canvas canvas) {
 int score = 0;
 //计算总分
 for (int i = 0; i 

/**
 * 绘制标题
 *
 * @param canvas 画布
 */
private void drawTitle(Canvas canvas) {
 for (int i = 0; i 

/**
 * 绘制图标
 *
 * @param canvas 画布
 */
private void drawIcon(Canvas canvas) {
 for (int i = 0; i