前言

  手游上架各大游戏应用商店（渠道）时候，很多渠道对游戏icon有要求， 需要加上渠道提供的角标才能正常上架，最开始的时候需要让美术去完成游戏icon和游戏角标合成工作， 客户端需要将美工合成后的图片复制到对应路径，多个游戏多个渠道都要来一遍，想想这个工作量就酸爽。合成图片这个工作太依赖美术 重复复制合成后的图片到对应路径 浪费大量的人力和时间成本。懒是第一生产力，反复重复的工作能用代码 解决绝不手动复制。

实现效果和说明

• 合成图片首先要有2张图片，放一个512 * 512游戏图标的ICON。注意一定要是PNG格式另需要一个512 * 512带渠道角标的图片（一般渠道都会提供）
  
• 用代码方式进行2张图片合成，合成后效果如下图app_icon.png

代码逻辑

• 用java.awt.Graphics2D 类 进行2张图片合成,建议游戏icon和渠道角标放在同一个路径下，合成后的icon放到另一个路径下。文件复制用到 FileUtils.copyFile()需要下载对应jar如有需要私信我,app_icon这个命名是获取AndroidMainfest.xml中application节点中配置的图标名称 例如android:icon=@drawable/app_icon ,@drawable对应着res下的"drawable-hdpi",“drawable-ldpi”, “drawable-mdpi”,“drawable-xhdpi”,“drawable-xxhdpi”, “drawable-xxxhdpi”,android:icon=@mipmap/app_icon,@mipmap对应着 “mipmap-hdpi”,“mipmap-mdpi”, “mipmap-xhdpi”,“mipmap-xxhdpi”,“mipmap-xxxhdpi”, “mipmap-xxxhdpi-v4”,“mipmap-xxhdpi-v4”,“mipmap-xhdpi-v4”,“mipmap-mdpi-v4”, “mipmap-ldpi-v4”,"mipmap-hdpi-v4"文件夹，合成后的icon需要复制到res/路径下替换。Java版本是打包工具合成icon功能中拆分出来的部分代码，有需要可以在这个基础上做下代码调整。python 版只是简单实现并没有处理多余的逻辑。
  
  

代码实现（java版本）

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import javax.imageio.ImageIO;
import org.apache.commons.io.FileUtils;
/***JDK1.8* @author sjr  2020-6-30*/
public class ChannelMergeImg {/*** 写入指定路径*/private static void writeImageToLocal(String marketIconPath,BufferedImage mergeImage) throws IOException {if (marketIconPath == "" || marketIconPath == null) {return;}if (mergeImage == null) {return;}ImageIO.write(mergeImage, "png", new File(marketIconPath));}private static BufferedImage getImageFromLocal(String path) throws IOException {return ImageIO.read(new File(path));}/*** @param gameIconPath    游戏icon路径* @param marketIconPath  渠道角标路径* @param mergeIconPath   合成后的角标路径*/public static void saveMergeImage(String gameIconPath, String marketIconPath,String mergeIconPath) {System.out.println("图片开始合成");try {writeImageToLocal(mergeIconPath,mergeImage(getImageFromLocal(gameIconPath),getImageFromLocal(marketIconPath)));System.out.println("图片合成结束");} catch (IOException e) {System.out.println("图片合成异常");e.printStackTrace();}}/*** 合并图片核心代码*/private static BufferedImage mergeImage(BufferedImage gameIconPath,BufferedImage marketIconPath) {if (gameIconPath != null && marketIconPath != null) {Graphics2D graphics2D = marketIconPath.createGraphics();graphics2D.drawImage(gameIconPath, 0, 0, 512, 512, null);graphics2D.dispose();}return marketIconPath;}public static List<String> getIconOutPutListDir(String  outPutDir) {String[] dirList = new String[] {"drawable-hdpi","drawable-ldpi", "drawable-mdpi", "drawable-xhdpi","drawable-xxhdpi", "drawable-xxxhdpi", "mipmap-hdpi","mipmap-mdpi",  "mipmap-xhdpi", "mipmap-xxhdpi","mipmap-xxxhdpi", "mipmap-xxxhdpi-v4", "mipmap-xxhdpi-v4","mipmap-xhdpi-v4", "mipmap-mdpi-v4", "mipmap-ldpi-v4","mipmap-hdpi-v4" };return Arrays.stream(dirList).map(dir -> outPutDir + dir).collect(Collectors.toList());}/*** 替换普通图标为带角标图片* @throws Exception*/public static void replaceGameIcon(String outPutDir ,String marketMargeIconPath) throws Exception {getIconOutPutListDir(outPutDir).stream().forEach(dir -> {if (!new File(outPutDir).exists()) {  //如果文件不存在 returnreturn;}try {FileUtils.copyFile(new File(marketMargeIconPath), new File(dir+ File.separator + "app_icon.png"));System.out.println("开始拷贝文件："+dir+File.separator+"app_icon.png");} catch (IOException e) {e.printStackTrace();}});System.out.println("拷贝图片结束");}public static void main(String[] args)  {String gameIconPath="C:\\Users\\Administrator\\Desktop\\master\\icon\\channelIcon\\common_icon.png";String  marketIconPath="C:\\Users\\Administrator\\Desktop\\master\\icon\\channelIcon\\icon_marker.png";String mergeIconPath="C:\\Users\\Administrator\\Desktop\\master\\icon\\app_icon.png";ChannelMergeImg.saveMergeImage(marketIconPath,gameIconPath, mergeIconPath);String   outPutDir="C:\\Users\\Administrator\\Desktop\\master\\output\\res\\";try {ChannelMergeImg.replaceGameIcon(outPutDir, mergeIconPath);} catch (Exception e) {e.printStackTrace();}}
}

合成代码实现（python2.7版本）

pip命令安装 pip install Pillow
相关API见:http://pillow.readthedocs.io/en/latest/reference/Image.html

# -*- coding: utf-8 -*-
from PIL import Image
'''图片合成
'''
def mergePicture():commonIcon= Image.open("C:/Users/Administrator/Desktop/common_icon.png")           markIcon = Image.open("C:/Users/Administrator/Desktop/icon_marker.png")markLayer = Image.new('RGBA', commonIcon.size, (0, 0, 0, 0))markLayer.paste(markIcon, (0, 0))out = Image.composite(markLayer, commonIcon, markLayer)out.save("C:/Users/Administrator/Desktop/app_icon.png", quality=95, subsampling=0)print ('Merge  picture Successful')if __name__== '__main__':mergePicture()

python2.7版本合成icon 参考借鉴了博客：http://www.uustory.com/?p=1778

结语：

  写blog的目的很明确：记录下自己的学习和工作经验，分享给有需要的人。如果有那里写的不对或者不理解,欢迎大家的指正。