.AP_ File Extension
File TypeADT Android Developer Package
This file is saved in a zipped format. You can view the contents by unzipping it with a file decompression program.
What is an AP_ file?
Developer file created by Android Development Tools (ADT), a set of plug-ins for the Eclipse IDE that facilitate app developement for the Android platform; similar to an Android package (.APK file) but contains the development resources before they are built into a final package; uses the filename resources.ap_ and is automatically created by ADT.
AP_ files are saved in a .ZIP format and can be decompressed with any Zip utility.