private void drawGuideline(Point[] points, Canvas canvas) {
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setColor(_guideline_color);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(_guideline_width);
        for (Point point : points) {
            canvas.drawLine(point.x, point.y, center.x, center.y, paint);
        }
    }
private void drawGuideline ( Point [ ] points , Canvas canvas ) { Paint paint = new Paint ( ) ; paint . setAntiAlias ( true ) ; paint . setColor ( _guideline_color ) ; paint . setStyle ( Paint . Style . STROKE ) ; paint . setStrokeWidth ( _guideline_width ) ; for ( Point point : points ) { canvas . drawLine ( point . x , point . y , center . x , center . y , paint ) ; } }
画引导线