A simple Androgaurd Script that Decompiles Dex bytecode into Java.

decompile_dex.py

#!/usr/bin/python
from sys import argv
from sys import exit
import os
from androguard.core.bytecodes import apk
from androguard.core.bytecodes import dvm
from androguard.decompiler.dad import decompile
from androguard.core.analysis import analysis
def convert_descriptor(name):
	name = name[1:]
	return name.replace("/",".").replace(";","")
def convert_field_desc(name,field_desc):
	return	
def check_dirs(directory):
		if not os.path.exists(PREFIX+directory):
			try:
				os.makedirs(PREFIX+directory)	
			except:
				pass
def check_path(class_path):
		org_path = class_path.replace(".","/")
		paths = org_path.split("/")
		paths = paths[:len(paths)-1]
		for index,folder in enumerate(paths):
			check_dirs('/'.join(paths[:index+1]))	
		return PREFIX+org_path+".java"
if __name__=="__main__":
	if len(argv) != 3:
		print "Usage: ./decompiler [APK] [OUTPUT_DIRECTORY]"
		print "*please ensure you use the full path for OUTPUT_DIRECTORY..."
		exit(1)
	PREFIX=argv[2]	
	if not os.path.exists(PREFIX):
		print "Output directory '%s' does not exist..." % (PREFIX)
		exit(1)
	elif not os.path.exists(argv[2]):	
		print "APK file '%s' not found..." % (argv[2])
		exit(1)
	a = apk.APK(argv[1])
	d = dvm.DalvikVMFormat(a.get_dex())
	vmx = analysis.VMAnalysis(d)
	for _class in d.get_classes():
		class_path = convert_descriptor(_class.get_name())
		path = check_path(class_path)
		print "[*] writing ...'",path,"'"
		if not os.path.exists(path):
			java = open(path,"w")
			for field in _class.get_fields():
				access_flags = field.get_access_flags_string()
				if access_flags == "0x0":
					access_flags = ""
				java.write("\t%s %s %s\n"% (access_flags,convert_descriptor(field.get_descriptor()),field.get_name()))
			for method in _class.get_methods():
				g = vmx.get_method(method)	
				if method.get_code() == None:
					continue
				ms = decompile.DvMethod(g)
				ms.process()
				for line in ms.get_source().split("\n"):
					java.write("\t%s\n" % line)
			java.flush()
			java.close()