CircleIndicator.java 文件源码

private void createMovingItem() {
    OvalShape circle = new OvalShape();
    ShapeDrawable drawable = new ShapeDrawable(circle);
    movingItem = new ShapeHolder(drawable);
    Paint paint = drawable.getPaint();
    paint.setColor(mIndicatorSelectedBackground);
    paint.setAntiAlias(true);

    switch (mIndicatorMode){
        case INSIDE:
            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));
            break;
        case OUTSIDE:
            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
            break;
        case SOLO:
            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
            break;
    }

    movingItem.setPaint(paint);
}