DEX File Extension

What is DEX file?

Rozszerzenie DEX is a executable file format used by Dalvik. DEX file contains compiled code to be executed in Android system environment. DEX files can be interpreted by Dalvik virtual machine.

DEX files in APK packages

DEX files are commonly found in APK packages, which are used for installing new software in Android. Each APK file contains single DEX file, classes.dex , which stores all classes and methods used by given application.

Additional information

DEX file may be generated automatically or manually by passing compiled Java programs to the interpreter.

Programs which support DEX file extension

The list that follows enumerates programs compatible with DEX files, divided into 4 categories based on operating system on which they are available. Files with DEX extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Updated: 01/13/2023

How to open file with DEX extension?

Problems with accessing DEX may be due to various reasons. Fortunately, most common problems with DEX files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. We have prepared a listing of which will help you resolve your problems with DEX files.

Step 1. Download and install Google Android SDK

Problems with opening and working with DEX files are most probably having to do with no proper software compatible with DEX files being present on your machine. This issue can be addressed by downloading and installing Google Android SDK or different compatible program, such as Eclipse, IntelliJ IDEA, Dedexer. Above you will find a complete listing of programs that support DEX files, classified according to system platforms for which they are available. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Google Android SDK website and download the installer.

Step 2. Check the version of Google Android SDK and update if needed

If you already have Google Android SDK installed on your systems and DEX files are still not opened properly, check if you have the latest version of the software. Software developers may implement support for more modern file formats in updated versions of their products. The reason that Google Android SDK cannot handle files with DEX may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Google Android SDK.

Step 3. Associate Dalvik Executable Format files with Google Android SDK

After installing Google Android SDK (the most recent version) make sure that it is set as the default application to open DEX files. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Change the default application in Windows

• Clicking the DEX with right mouse button will bring a menu from which you should select the Open with option
• Select Choose another app → More apps
• Finally select Look for another app on this PC, point to the folder where Google Android SDK is installed, check the Always use this app to open DEX files box and conform your selection by clicking OK button

Change the default application in Mac OS

• By clicking right mouse button on the selected DEX file open the file menu and choose Information
• Proceed to the Open with section. If its closed, click the title to access available options
• Select Google Android SDK and click Change for all...
• If you followed the previous steps a message should appear: This change will be applied to all files with DEX extension. Next, click the Continue button to finalize the process.

Step 4. Ensure that the DEX file is complete and free of errors

Should the problem still occur after following steps 1-3, check if the DEX file is valid. Problems with opening the file may arise due to various reasons.

1. The DEX may be infected with malware – make sure to scan it with an antivirus tool.

If the file is infected, the malware that resides in the DEX file hinders attempts to open it. Scan the DEX file as well as your computer for malware or viruses. If the DEX file is indeed infected follow the instructions below.

2. Check whether the file is corrupted or damaged

Did you receive the DEX file in question from a different person? Ask him/her to send it one more time. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. If the DEX file has been downloaded from the internet only partially, try to redownload it.

3. Ensure that you have appropriate access rights

Some files require elevated access rights to open them. Log in using an administrative account and see If this solves the problem.

4. Verify that your device fulfills the requirements to be able to open Google Android SDK

If the systems has insufficient resources to open DEX files, try closing all currently running applications and try again.

5. Ensure that you have the latest drivers and system updates and patches installed

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Dalvik Executable Format files. It may be the case that the DEX files work properly with updated software that addresses some system bugs.

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