What does APK represent? What is the inner layout?
APK (Android Package) documents is a documents layout which is developed by Google. This layout is just one of the team participants of Executable Files (comparable to EXE, MST, AIR).
APK documents expansion remains in the Open Handset Alliance which is a cellphone system based upon Linux. This documents expansion is specifically developed when making use of Google is Android SDK. APK documents have the code documents, source documents and also the AndroidManifest XML documents expansion. For even more information http://edugoing.com/qna/index.php?qa=14&qa_1=describe-the-apk-format#a171