How to backup your Google Authenticator QR codes (Android)

This is a guide to backup / extract / transfer Google Authenticator QR codes from one rooted Android device to any non-rooted device.

# Prerequisites

The original Android device must be rooted.
You'll need Python and adb to be installed.

# Steps

Enable developer options on your Android device where Google Authenticator is installed.
In the developer options, enable Android debugging (ADB) and enable Root access: for ADB

Then on your computer:

Open a terminal.
Run mkdir authenticator-backup (Create a folder to store the data)
Run cd authenticator-backup (Move to this folder)
Run adb root (to gain root access on the Android device -- you might have to accept the prompt on your Android device)
Run adb pull /data/data/com.google.android.apps.authenticator2/databases/databases (to grab your Google Authenticator database containing your secrets)
Tips: If you have sqlite3 installed, you can list your secrets with this command: sqlite3 ./databases "select * from accounts" (you can then add them manually on Google Authenticator if you want to, without needing the python script below)
Extract QR codes - Create a generate-qrcodes.py file with the following content (thanks Zian for the script):

import qrcode
import sqlite3
conn = sqlite3.connect('./databases')
c = conn.cursor()

for idx, (email, secret, issuer) in enumerate(c.execute("SELECT email,secret,issuer FROM accounts").fetchall()):
   if issuer==None:
       if len(email.split(" "))>0:
           issuer=email.split(" ")[0]
       else:
           issuer=email

       if len(issuer.split(":"))>0:
           issuer=issuer.split(":")[0]

       print("If the following issuer looks wrong, enter a new value. If it's OK, just press ENTER.")
       newIssuer=input(issuer)
       if len(newIssuer)>0:
           issuer=newIssuer
   url = 'otpauth://totp/{}?secret={}&issuer={}'.format(email, secret, issuer)
   print (url)
   im = qrcode.make(url)
   im.save('./{}.png'.format(idx))