I bought 3 baby puffer fish and they don&#39;t seem to be eating pellets, flakes or bloodworms.
Apk is the android package. R.java (auto generated file) when compiled along with .class (java classes) generated .dex file but these files are not deployable. .dex files are then reprocessed along with manifest file, and other resources (mp3, video, image) and .apk file is generated. This file is deployable.
Android application package file commonly known as an APK (.apk) file is the format of installable files on Android platform. Every application you have installed or want to install on your Android device has the .apk extension or file format.