What are the contents of an Android APK file

Question

• what are the components of the APK file ?
• Is it just bunch of executable\'s ?
• what are the names of the components ?

Answer 1

[APK] 
|
|_ _ _ _ DALVIK EXECUTABLE < This is a code that runs the android app >
|
|_ _ _ _ RESOURCES < Images, video files, Audio files, xml files, Language packs >
|
|_ _ _ _ NATIVE LIBRARIES < some native code that include c & c++ libraires >