Recovering Google Authenticator keys from Android device for backup

gen_qrcode.py

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()):
    url = 'otpauth://totp/{}?secret={}&issuer={}'.format(email, secret, issuer)
    print url
    im = qrcode.make(url)
    im.save('{}.png'.format(idx))

howto-recover-google-authenticator-keys.txt

### Device with Google Authenticator must have root.
### Computer requires Android Developer Tools and python with sqlite3 and qrcode

### Connect your device in USB debugging mode.

# Original solution with `adb root` does not work for me

$ cd /tmp
$ adb shell
# Now you're on the phone
$ su  # and do any auth action your root requires
$ cp  /data/data/com.google.android.apps.authenticator2/databases/databases /sdcard/Download/
$ exit
$ exit
# Now you're back on the computer
$ adb pull /sdcard/Download/databases
# Remove databases from public folder
$ adb shell
$ rm /sdcard/Download/databases
$ python gen_qrcode.py

### You can see generated qr images in the current folder. Scan them in Google Authenticator when you are ready