将文件从资产复制到/data/data文件夹

I need to use some files in my app. They are kept in asset folder. I saw discussions on SO, where the files are being copied from asset folder, to /data/data/ on the internal storage, and then being used. I get the code, but what I do not get is, what is the need to copy the assets to internal storage ? If anybody has experience with this, help !I need to use some files in my app. They are ke