Decompile APK Files: How to Get Source Code - RRutors Guide

For APK reverse engineering we have lots of ways.

Option 1: From Android Studio

Use the “Profile or Debug APK” feature in Android Studio

This will open and explore the APK - in Android Studio. Classes are de-compiled into small Resources are not retrieved and things like “Go to definition”, “Find all links” and debugging does not work without source code 

Option 2: 

  • Download apktool.bat(or apktoolfor Linux) and apktool_.jar from http://ibotpeaches.github.io/Apktool/install/
  • Rename the file to the jar from above apktool.jar and place both files in the same folder,
  • Open a Command line window  and change to this folder; make sure the Java environment is installed 
  • Run apktool decode [apk file]
    • This will generates : resource files,AndroidManifest.xml

 

  • Unzip the APK file with the unpacker of your choice
    • This will generate :classes.dex

 

  • Download and extract dex2jar-0.0.9.15.zip from http://code.google.com/p/dex2jar/downloads/detail?name=dex2jar-0.0.9.15.zip&can=2&q=
  • Drag classes.dex to dex2jar.bat(or enter \dex2jar.bat classes.dex in the DOS field, Linux to use dex2jar.sh)
    •  This will generate :classes_dex2jar.jar

 

  • Unpack classes_dex2jar.jar(may be optional depending on the decompiler used)
  • Decompile class files (e.g. with JD-GUI or DJ Decompiler )
    •  This will generate : source code

Option 3:

Use below Online tool to decompile APK

http://www.javadecompilers.com/apk

Check List for Generate Signed APK Android

How to check Android version?

How to Generate signed apk with android studio

What is Application?

ERR_ACCESS_DENIED in Android Webview with sdk 30

How to stop EditText  focus at Activity startup in Android?

Key Points to remember while develop the Android Application.  

How to avoid multiple button click at same time in android?

Fix Duplicate Files in APK Build.gradle Issue - RRutors

How to find Android Device UDID or unique ID?

What is the Different Between val and var in Kotlin?

How to reduce APK package size?

What is the difference between match_parent and fill_parent?

What are Android Versions available?

Hide/Disable soft keyboard on Activity launch: Android

Fix Behavior Subclass BottomSheetBehavior Exception - RRutors

How to get screen size (width,height) in Android?

What is ANR in android?

How do I generate random numbers in Dart?

Fix Android Emulator Kill Error When Running Your App

How to convert DP to Pixel and Pixel to Dp?

Open PDF in Google Drive with Intent in Android - RRutors

Fix Error: Use JsonReader.setLenient(true) for Malformed JSON

INSTALL_FAILED_INVALID_APK: Split lib_slice_9_apk was defined multiple times. It is possible that th

How to convert milli seconds to hours, minutes and seconds in Android? 

Explain Fragment Life Cycle

What are the notifications available in android?

Add Jar/Library Files as Dependency in Android Studio

How to install/ uninstall apk by command line ADB

How to get an image resource by it's name in android?

Decompile APK Files: How to Get Source Code - RRutors Guide

How to start a new activity on button click

Invoke-customs are only supported starting with android 0 --min-api 26

What is Context?

Permission denied for window type 2010 in Marshmallow device

What is Intent? What is the difference between an implicit intent and an explicit intent?

How to copy database from assets folder in android using kotlin

How to Use Deprecated Handler() in Android - RRutors Guide

What is NetworkOnMainThread Exception?

FCM Not Receiving Notifications in Android - RRutors

Projects By category