Script to download and decompile an apk using just the package name.

apk_decompiler.py

import requests
from bs4 import BeautifulSoup
from subprocess import call
import sys

# Script to download and decompile an apk using the package name.
# Install the jadx decompiler before running this.
#
# JADX installation :
# $ git clone https://github.com/skylot/jadx.git
# $ cd jadx
# $ ./gradlew dist
# $ ln -s <path_to_jadx_repository>/build/jadx/bin/jadx /usr/local/bin/jadx


BASE_URL = "https://apkpure.com/app/"

if len(sys.argv) < 2:
  print "Usage :\n$ python apk_decompiler.py <package_name>"
  exit(-1)

pkg_name = sys.argv[1]

s = requests.Session();

initial_res = s.get(BASE_URL + pkg_name)

if initial_res.status_code != 200:
  print 'Package no found on APKPure'
  exit(-2)

print pkg_name, 'found on apkpure.com'

initial_soup = BeautifulSoup(initial_res.content, 'html.parser')

DOWNLOAD_BASE_URL = 'download.apkpure.com';

all_links = [x.get('href') for x in initial_soup.find_all('a')]
download_link = (x for x in all_links if DOWNLOAD_BASE_URL in x and pkg_name in x).next()

print 'Donwloading apk from', download_link;

apk_res = s.get(download_link)

print apk_res.status_code

fname = pkg_name + ".apk"

fo = open(fname, "w")
fo.write(apk_res.content)
fo.close()

print fname, 'saved locally, now decompiling..'

call(['jadx', fname])