Android Question Why compiler delete file from res / folder

If I get you right: It is normal because all the files are generated due to the compile (as the *.apk file is overwritten when you compile). Did you store any other files there? Use another folder and add the files via Files Manager.

The IDE manages the res folder. It can create new files during compilation. Note that icons and readonly files will not be deleted.

You should add text resources with CreateResource command (in the manifest editor).