附上计算位置的代码类:     

package com.xcl.chart; /** * Canvas练习 * 图形相关的计算类 * * author:xiongchuanliang * date:2014-4-9 */ public class XChartCalc { //Position位置 private float posX = 0.0f; private float posY = 0.0f; public XChartCalc() { } //依圆心坐标，半径，扇形角度，计算出扇形终射线与圆弧交叉点的xy坐标 public void CalcArcEndPointXY(float cirX, float cirY, float radius, float cirAngle){ //将角度转换为弧度 float arcAngle = (float) (Math.PI * cirAngle / 180.0); if (cirAngle < 90) { posX = cirX + (float)(Math.cos(arcAngle)) * radius; posY = cirY + (float)(Math.sin(arcAngle)) * radius; } else if (cirAngle == 90) { posX = cirX; posY = cirY + radius; } else if (cirAngle > 90 && cirAngle < 180) { arcAngle = (float) (Math.PI * (180 - cirAngle) / 180.0); posX = cirX - (float)(Math.cos(arcAngle)) * radius; posY = cirY + (float)(Math.sin(arcAngle)) * radius; } else if (cirAngle == 180) { posX = cirX - radius; posY = cirY; } else if (cirAngle > 180 && cirAngle < 270) { arcAngle = (float) (Math.PI * (cirAngle - 180) / 180.0); posX = cirX - (float)(Math.cos(arcAngle)) * radius; posY = cirY - (float)(Math.sin(arcAngle)) * radius; } else if (cirAngle == 270) { posX = cirX; posY = cirY - radius; } else { arcAngle = (float) (Math.PI * (360 - cirAngle) / 180.0); posX = cirX + (float)(Math.cos(arcAngle)) * radius; posY = cirY - (float)(Math.sin(arcAngle)) * radius; } } ////////////// public float getPosX() { return posX; } public float getPosY() { return posY; } ////////////// }    至此，我最近遇到的两个技术问题(一个被工作逼的，一个感兴趣的)都基本解决了，爽!

   

附其它链接:

   Android Canvas练习(1)画一张报表来玩   

   Android Canvas练习(2)自已绘饼图

   Android Canvas练习(3)自已绘柱形图

   Android Canvas练习(4)自已绘折线图

    Android Canvas练习(5)自已绘面积图(Area Chart)

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