As my app have lots of images, so I wanted to categorize them and put into some subfolders, but the IDs disappeared from R.java when I did it.
Unfortunately, the android environment seems to be designed to ignore the subfolders under "drawable" etc..
http://stackoverflow.com/questions/1077357/can-the-android-drawable-directory-contain-subdirectories
Oh, my...
アプリ内に画像がいろいろ増えてきたんでカテゴリ分けしてサブフォルダに・・・と思ったら、サブフォルダに映すと R.java からIDが消えてしまう。
どうやらサブフォルダは無視される仕様らしい・・・
http://stackoverflow.com/questions/1077357/can-the-android-drawable-directory-contain-subdirectories
なんちゅう設計や・・・