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
