Java代码修改PNG(背景透明)图片

各位蜘蛛辛苦了~本文章关键字为：PNG透明背景、代码修改图片、Java写PNG文件。

 

偶得一套PNG的Hero行走动画(感谢原作者)，非常精细，骨头甚至喜欢，但是原图（hero.png）空白太多，放在手机里有点浪费。又不想麻烦美工，于是想自己用代码修改下，修改后如右图(hero_ok.png),

 

 

 

上代码：

 

/** * resizePNG:Resize the PNG file. * * @author lazybone,2010.08.16 * * @param fromFile * @param fromW * @param fromH * @param toFile * @param toW * @param toH */ public static void resizePNG(String fromFile, int fromW, int fromH, String toFile, int toW, int toH) { try { BufferedImage to = new BufferedImage(toW, toH, BufferedImage.TYPE_INT_RGB); Graphics2D g2d = to.createGraphics(); to = g2d.getDeviceConfiguration().createCompatibleImage(toW, toH, Transparency.TRANSLUCENT); g2d.dispose(); g2d = to.createGraphics(); File f2 = new File(fromFile); BufferedImage bi2 = ImageIO.read(f2); Image from = bi2.getScaledInstance(fromW, fromH, bi2.SCALE_DEFAULT); int a = 128; int b = 128; int tileCount = 8; int offset = 50; for (int i = 0; i < tileCount; i++) for (int j = 0; j < tileCount; j++) { g2d.drawImage(from, i * a - i * offset - offset / 2, j * a - j * offset - offset / 2, i * a + a - i * offset - offset / 2, j * a + a - j * offset - offset / 2, i * b, j * b, i * b + b, j * b + b, null); } g2d.dispose(); ImageIO.write(to, "png", new File(toFile)); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) throws IOException { System.out.println("Start"); int toSize = 624; int fromSize = 1024; resizePNG("d://hero.png", fromSize, fromSize, "d://hero_ok.png", toSize, toSize); System.out.println("OK"); }