private void ReleaseAssets(Context context) {
   CreateRootDir();
   CreateDataDir("ejoy2d");
   CreateDataDir("assets");
   String[] files = {
     "ejoy2d/init.lua",
     "ejoy2d/matrix.lua",
     "ejoy2d/particle.lua",
     "ejoy2d/shader.lua",
     "ejoy2d/simplepackage.lua",
     "ejoy2d/sprite.lua",
     "ejoy2d/spritepack.lua",
     "FZCY_GBK.ttf",
     "ex01.lua",
     "ex02.lua",
     "ex03.lua",
     "ex04.lua",
     "ex05.lua",
     "particle.1.pgm",
     "particle.1.ppm",
     "particle.lua",
     "particle_particle_config.lua",
     "sample.1.pgm",
     "sample.1.ppm",
     "sample.lua"
   };
   for (int i = 0; i < files.length; i++) {
     CreateDataFile(context, files[i]);
   }
 }