RadarView.java 文件源码

/**
 * 绘制正多边形
 */
private void drawPolygon(Canvas canvas){
    Path path = new Path();
    float r = radius/(count-1);
    for(int i=1;i<count;i++){
        float curR = r*i;
        path.reset();
        for(int j=0;j<count;j++){
            if(j==0){
                path.moveTo(centerX+curR,centerY);
            }else{
                float x = (float) (centerX+curR*Math.cos(angle*j));
                float y = (float) (centerY+curR*Math.sin(angle*j));
                path.lineTo(x,y);
            }
        }
        path.close();
        canvas.drawPath(path, mainPaint);
    }
}