script.py

import frida, sys, time, os, json
from argparse import ArgumentParser


parser = ArgumentParser()
parser.add_argument("pkg",
                    help="Package name to attach")
parser.add_argument("cls",
                    help="Class (full) name to attach")
parser.add_argument("mth",
                    help="Method name to call in Frida")
parser.add_argument("-f", "--file", default="arguments.txt", nargs='?',
                     help="File name in this folder where the arguments to the method are stored (default name: arguments.txt).")
parser.add_argument("-s", "--script", default="script.js", nargs='?',action='store',
                     help="Frida script name, in case you want to change it (default name: script.js).")

args = parser.parse_args()



def from_file(file):
    count = 0
    my_input = [ ]
    with open(file) as fp:
        while True:
            count += 1
            line = fp.readline()
            if not line:
                break
            my_input.append(line)
    script.on('message', on_message)
    script.load()
    script.post({'type': 'cls', 'class': args.cls, 'meth': args.mth, 'line':my_input})
    time.sleep(1)  # fails without this sleep
    device.resume(pid)
    sys.stdin.read()


device = frida.get_usb_device()
pid = device.spawn([args.pkg])
session = device.attach(pid)

def on_message(message, data):
	try:
	    print(message["payload"])
	except: 
	    print(message)

with open(args.script) as f:
    script = session.create_script(f.read())
    from_file(args.file)