It could parse an APK file into possible source code. With this app you could deep into an apk structure and you could also extract pictures from it. (Be authorized or for your own use)

APK Extractor will extracts/share/backup APK of all application which is installed in your device and also shows the list of all apk that were saved in your SD Card.


APK Installer allows you to view Package Name APK files location and installation date APK file MD5 SHA-1 signature Permission UID Shared UID Minimum API Level Target API Level Component Info(Activity Service Receiver and Provider).
By Default Apk's will be saved in /sdcard/ExtractedApks/.


APK editor: APK creator. This useful APK tool helps you easily to edit and change installed applications and generate an APK file on your device. Save easily it to your SD Card.

APK editor
APK creator
APK extractor
APK generator
Fast APK editors


Features:

★ Fast and easy to use.
★ Extract all the applications in your device User and System (ONLY ROOT DEVICE)

★ Create project based on built-in templates
★ Source code editing with built-in editor or external editor
★Built-in image downloader
★ 2 build environments: GUI or command line
★ Quick Search for file name or file content
★ Custom sign key supported

Reasons to use it:
★ Learn android app development with samples
★ Build your own smaller apps (For example the flashlight sample apk is only about 25k
much smaller than others from market)
★ Possible to interact with other APK tools
★ Cutomize your own build strategy with the script turn your idea into reality