RadarView.java 文件源码

/**
 * 绘制区域
 * @param canvas
 */
private void drawRegion(Canvas canvas){
    Path path = new Path();
    valuePaint.setAlpha(255);
    for(int i=0;i<count;i++){
        double percent = data[i]/maxValue;
        float x = (float) (centerX+radius*Math.cos(angle*i)*percent);
        float y = (float) (centerY+radius*Math.sin(angle*i)*percent);
        if(i==0){
            path.moveTo(x, centerY);
        }else{
            path.lineTo(x,y);
        }
        //绘制小圆点
        canvas.drawCircle(x,y,10,valuePaint);
    }
    valuePaint.setStyle(Paint.Style.STROKE);
    canvas.drawPath(path, valuePaint);
    valuePaint.setAlpha(127);
    //绘制填充区域
    valuePaint.setStyle(Paint.Style.FILL_AND_STROKE);
    canvas.drawPath(path, valuePaint);
}