最新 cocos2d-x自适应android不同分辨率，使用多套资源

虽然 cocos2d-x自带了三种模式来适应屏幕，但还是存在一些问题，会产生黑边，所以还是需要多套资源来适应屏幕。

这里我选择了四种分辨率9:16 3:5 2:3 3:4，在resource资源目录下新建了四个文件夹放置多套背景图片，在AppDelegate中添加如下函数调用即可。

 void AppDelegate::ScreenAdaptive()
 {
     CCSize szFrame = CCEGLView::sharedOpenGLView()->getFrameSize();
     float Proportion = szFrame.width/szFrame.height;
     const int num = 4;
     float diff[num]={fabs(Proportion-(9.0/16)),
         fabs(Proportion-(3.0/5)),fabs(Proportion-(2.0/3)),fabs(Proportion-(3.0/4))};
     int yy = -1;
     for (int i=0;i
         if((diff[i] >-0.000001) && (diff[i] < 0.000001))
         {
             yy = i;
             break;
         }
     if (yy == -1)
     {
         int min = diff[0];
         yy = 0;
         for (int i=1;i
             if (diff[i]
             {
                 min = diff[i];
                 yy = i;
             }
     }
     switch(yy)
     {
     case 0:
         {
             std::vector searchPaths;
             searchPaths.push_back("9x16");
             CCFileUtils::sharedFileUtils()->setSearchPaths(searchPaths);
             CCEGLView::sharedOpenGLView()->setDesignResolutionSize(648,1152, kResolutionShowAll);
             break;
         }
     case 1:
         {
             std::vector searchPaths;
             searchPaths.push_back("3x5");
             CCFileUtils::sharedFileUtils()->setSearchPaths(searchPaths);
             CCEGLView::sharedOpenGLView()->setDesignResolutionSize(624,1040, kResolutionShowAll);
             break;
         }
     case 2:
         {
             std::vector searchPaths;
             searchPaths.push_back("2x3");
             CCFileUtils::sharedFileUtils()->setSearchPaths(searchPaths);
             CCEGLView::sharedOpenGLView()->setDesignResolutionSize(640,960, kResolutionShowAll);
             break;
         }
     case 3:
         {
             std::vector searchPaths;
             searchPaths.push_back("3x4");
             CCFileUtils::sharedFileUtils()->setSearchPaths(searchPaths);
             CCEGLView::sharedOpenGLView()->setDesignResolutionSize(624,832, kResolutionShowAll);
             break;
         }
     }
 }

这里简单介绍一下setSearchPaths，在最近更新的版本里，已经没有了setResourceDirectory，取而代之的是setSearchPaths，以下是关于它的描述：

 /**
  *  Sets the array of search paths.
  *
  *  You can use this array to modify the search path of the resources.
  *  If you want to use "themes" or search resources in the "cache", you can do it easily by adding new entries in this array.
  *
  *  @note This method could access relative path and absolute path.
  *        If the relative path was passed to the vector, CCFileUtils will add the default resource directory before the relative path.
  *        For instance:
  *         On Android, the default resource root path is "assets/".
  *         If "/mnt/sdcard/" and "resources-large" were set to the search paths vector,
  *         "resources-large" will be converted to "assets/resources-large" since it was a relative path.
  *
  *  @param searchPaths The array contains search paths.
  *  @see fullPathForFilename(const char*)
  *  @since v2.1
  */

 // set searching paths to "/mnt/sd/example" and "/data/data/org.cocos2dx.example"
 vector searchPaths;
 searchPaths.push_back("/mnt/sd/example");
 searchPaths.push_back("/data/data/org.cocos2dx.example");
 CCFileUtils::setSearchPaths(searchPaths);
 // engine will find "1.png" in /mnt/sd/example, if there it is not found, then engine will find "1.png" in /data/data/org.cocos2dx.example
 // if not found, engine will find "1.png" in Resources/ (this path is platform dependent)

 CCSprite *pSprite = CCSprite::create("1.png");