Where are .dex files located after apk installation?

After installation of apk file on android devic开发者_运维知识库e, where exactly does the dex file get stored or what is done with dex?

Could any one please explain how the installation happens on android device?

dex files are located in the /data/dalvik-cache folder.

The apk file is a compressed archive (actually a .zip in disguise) containing all the files needed for your program. It is stored in the data/app folder. The dex files are contained in this archive, which you can extract with any unzip tool.