You need Three Tools to decompile an APK file. Dex2jar – Tools to work with android .dex and java .class files ApkTool – A tool for reverse engineering Android apk files JD-GUI – Java Decompiler is a tools to decompile and analyze Java 5 “byte code” and the later versions. for more how-to-use-dextojar. Hope this … Read more
If it executes, it can be decompiled. Objective-C is particularly easy to decompile into readable code thanks to its dynamic features. If you want to make things a little bit harder, you could write most of your code in plain C and strip the executable — which of course has the tradeoff of making your … Read more
Thanks to Chris Jester-Young I managed to make it work! I think the way I managed to do it will work only on really simple projects: With Dex2jar I obtained the Jar. With jd-gui I convert my Jar back to Java files. With apktool i got the android manifest and the resources files. In Eclipse … Read more
The first stop for me would be to optimise and obfuscate the code with ProGuard which is known to work with byte code targeted at Android’s Dalvik VM (via Dex). It’s a really great tool and can increase the difficulty of ‘reversing’ your code while shrinking your code’s footprint (in some cases dramatically: a recent … Read more
One thing to keep in mind is that you want to do this in a way that makes business sense. To do that, you need to define your goals. So, exactly what are your goals? Preventing piracy? That goal is not achievable. Even native code can be decompiled or cracked; the multitude of warez available … Read more
Never hard-code passwords into your code. This was brought up recently in the Top 25 Most Dangerous Programming Mistakes: Hard-coding a secret account and password into your software is extremely convenient — for skilled reverse engineers. If the password is the same across all your software, then every customer becomes vulnerable when that password inevitably … Read more
With a debugger you can step through the program assembly interactively. With a disassembler, you can view the program assembly in more detail. With a decompiler, you can turn a program back into partial source code, assuming you know what it was written in (which you can find out with free tools such as PEiD … Read more
For the final, compiled code of your application, the short answer is “no”. Different tools are able to extract different information from the code (e.g. the forms setups) and there are P code decompilers (see Edgar’s excellent link for such tools). However, up to this day, there is no decompiler for native code. I’m not … Read more
You can use IDA Pro by Hex-Rays. You will usually not get good C++ out of a binary unless you compiled in debugging information. Prepare to spend a lot of manual labor reversing the code. If you didn’t strip the binaries there is some hope as IDA Pro can produce C-alike code for you to … Read more
There are two useful tools which will generate Java code (rough but good enough) from an unknown APK file. Download dex2jar tool from dex2jar. Use the tool to convert the APK file to JAR: Windows: $ d2j-dex2jar.bat demo.apk dex2jar demo.apk -> ./demo-dex2jar.jar MacOS / Linux: $ d2j-dex2jar.sh -f demo.apk -o demo.jar Once the JAR file … Read more