Android discussion

Question

what is the structure of the android app ?
(Only I know that the apk is the same format of the zip please correct me if I'm wrong)

Answer 1

yes you are right that apk is same format as zip.
App contains
✔androidmanifest.xml it contains all permissions app requires and all action it does with package name, version … info.
✔classes.dex (dalvic cache) it is not even when app is uninstalled. only removed with root or by resetting phone.
✔asset folder contains assets (can be video for starting screen, some music, …)
✔res folder contains appearance of app with icons
✔lib contains lib which defines behaviour of app. written in hex
… I don't remember it all.
Everything based upon my experience not read anywhere. So, not 100% correct. I've extracted many apks and modified them as well as lowered size.