Reverse Engineering: 4.Python script to automate decompiling Android apk files

Hi 🙂 , here I will explain how to write a simple python script to automate the process of decompiling Android APK files using apktool .jar.

First, you need to have apktool.jar installed at location “/usr/local/bin/”.
Then, put all the apk files in a directory: “/home/Documents/Project/APKS”.
Now, you can simply traverse inside this directory using os.walk (path_to_dir) and decompile each apk using the commands available with apktool.jar
Run the python script with this command

python decompileApk.py '/home/kulani/Documents/Project/APKS'

decompileApk.py

import os
import sys
import subprocess

walk_dir = sys.argv[1]
#-------------------------------------decompile----------------------------

i = 0

apktool = "/usr/local/bin/apktool.jar"

for root, subdirs, files in os.walk(walk_dir):
 list_file_path = os.path.join(root, 'my-directory-list.txt') 
 
 with open(list_file_path, 'wb') as list_file:
 for file in files:
 if file.endswith(".apk"):
 i=i+1
 print str(i)+"-"+file 
 os.system("java -jar " + apktool + " d " + root+"/"+file)

Cheers ! 🙂

5 comments on “Reverse Engineering: 4.Python script to automate decompiling Android apk files”

ı try to use code above to decompile by apps but it doesnt work. I use the saem code.
can u tell something about this:
apktool = “/usr/local/bin/apktool.jar”

does it has to be in usr/local/bin/apktool.jar.
instead of this I put
c:\\apktool.
when I try to run python script it has an error

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walk_dir= sys.argv[3]
IndexError: list index out of range

this is the error that I have.

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Why did you put 3 for sys.argv[]?
In my code I use 1 for sys.argv[], to get the apk location ‘/home/kulani/Documents/Project/APKS’ from the command line

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