README.md

Android emulator login

Quickly logs in on an Android device, via adb, using credentials from a CSV file.

Requirements: dialog (terminal) or zenity (GUI) for the UI

Configuration:

.user-passwords.csv

user1,password1
user2,password2

android-emulator-login.py

#!/usr/bin/env python

import csv
import os
import subprocess

USER_PASSWORDS_FILE = '.user-passwords.csv'


def list_connected_devices():
    output = subprocess.check_output(['adb', 'devices'])
    for line in output.splitlines()[1:]:  # First line is header
        if not line:
            continue
        data = line.split()
        yield data[0].decode()


def list_credentials():
    with open(USER_PASSWORDS_FILE, 'r') as fp:
        for line in csv.reader(fp):
            yield tuple(line)


def _check_command(name):
    return subprocess.call(
        ['which', name],
        stderr=subprocess.DEVNULL,
        stdout=subprocess.DEVNULL) == 0


def _get_prompt_option():
    PROMPT_OPTIONS = [
        ('zenity', True, _prompt_selection_zenity),
        ('dialog', False, _prompt_selection_dialog),
    ]

    UI_AVAILABLE = bool(os.environ.get('DISPLAY'))
    for command, require_ui, function in PROMPT_OPTIONS:
        if require_ui and not UI_AVAILABLE:
            continue
        if _check_command(command):
            return function
    raise ValueError('Could not find any alternative to show dialogs. '
                     'Please install either dialog (for terminal UI) or '
                     'zenity (for graphical UI)')


def prompt_selection(choices, title='Your choice'):
    func = _get_prompt_option()
    return func(choices, title=title)


def _prompt_selection_dialog(choices, title):
    args = [
        'dialog', '--stdout', '--no-tags',
        '--menu', title, '0', '0', '0'
    ]
    for item in choices:
        args += [item, item]
    output = subprocess.check_output(args)
    return output.splitlines()[0].decode()


def _prompt_selection_zenity(choices, title):
    args = [
        'zenity', '--list', '--hide-header',
        '--text', title,
        '--print-column', '1',  # Label
        '--separator', r'\n',
        '--column', 'Name',
    ]
    for item in choices:
        args.append(item)
    output = subprocess.check_output(args)
    return output.splitlines()[0].decode()


if __name__ == '__main__':

    device_name = prompt_selection(
        sorted(list_connected_devices()),
        title='Select device')

    passwords = dict(list_credentials())
    user_name = prompt_selection(
        sorted(passwords.keys()),
        title='Select user credentials')

    print('Device: {}'.format(device_name))
    print('User: {}'.format(user_name))

    user_passowrd = passwords[user_name]
    command = [
        'adb', '-s', device_name, 'shell',
        'input', 'text', user_name, ';',
        'input', 'keyevent', 'TAB', ';',
        'input', 'text', user_passowrd, ';',
        'input', 'keyevent', 'ENTER']

    subprocess.check_call(command)