What is a dex file and how do I open a dex file?
Dalvik executable files are developer files affixed with the .dex extension, and these DEX files are used to initialize and execute applications developed for the Android mobile OS. The data stored in these DEX files includes compiled code that locates and initializes other program files of the associated application required to run the program. Google developed the DEX file format, and the Android OS (also developed by Google) is a Unix-based platform for supported mobile phones. The Dalvik virtual machine is an application service implemented into the Android OS to interpret the compiled code stored in a DEX file. Developers with Microsoft Windows-based systems or Mac platforms can create Android applications with DEX files by using the Google Android SDK software. Compiled Java applications can also be translated into Android programs with associated DEX executable files. Multiple DEX files are stored in a distributable package saved in the APK format, and these APK files are the actual Android applications.
Relevant dex file links:How to open dex file on Youtube
How to open dex file on Wikipedia
How to open dex file on Microsoft.com