Currency formatting not working on Android

[lucascwill]

I've been working on an app for my sales team to use with its customers, but when i get the results on my android the numbers which should be formatted as currency (example: R$5.000,00") come as (5000000000000000).

A simple code exemplifying the function:

import locale
try:
    locale.setlocale(locale.LC_ALL, 'pt_BR.UTF-8')
except locale.Error:
    locale.setlocale(locale.LC_ALL, '')

import toga
from toga.style import Pack
from toga.style.pack import COLUMN, ROW

class SimpleSumApp(toga.App):

    def startup(self):
        # main window
        self.main_window = toga.MainWindow(title=self.formal_name)

        # main box
        main_box = toga.Box(style=Pack(direction=COLUMN, padding=10))

        # input fields
        input_box1 = toga.Box(style=Pack(direction=ROW, padding=(0, 5)))
        input_box1.add(toga.Label('First Number:', style=Pack(width=100)))
        self.num1_input = toga.TextInput(style=Pack(flex=1))
        input_box1.add(self.num1_input)
        main_box.add(input_box1)

        input_box2 = toga.Box(style=Pack(direction=ROW, padding=(0, 5)))
        input_box2.add(toga.Label('Second Number:', style=Pack(width=100)))
        self.num2_input = toga.TextInput(style=Pack(flex=1))
        input_box2.add(self.num2_input)
        main_box.add(input_box2)

        # Calculate button
        button_box = toga.Box(style=Pack(direction=ROW, padding=5))
        calc_button = toga.Button('Calculate', on_press=self.calculate, style=Pack(flex=1))
        button_box.add(calc_button)
        main_box.add(button_box)

        # result label
        self.result_label = toga.Label('Result in currency: ', style=Pack(padding=(10, 5)))
        main_box.add(self.result_label)

        # Main window
        self.main_window.content = main_box
        self.main_window.show()

    def calculate(self, widget):
        try:
            # convertr strings with commas to floats
            def to_float(value):
                return float(value.replace(',', '.'))

            # input values
            num1 = to_float(self.num1_input.value)
            num2 = to_float(self.num2_input.value)

            # (sum values)
            result = num1 + num2

            # Format the result as currency and refresh the label
            self.result_label.text = locale.currency(result, grouping=True)
        except ValueError as e:
            # refresh label in case of invalid entry 
            self.result_label.text = f'Invalid! {e}'

def main():
    return SimpleSumApp('Simple Sum', 'com.example.simplesum')

if __name__ == '__main__':
    main().main_loop()

Here is how it should be (and also the result when I execute it on Windows):

Here is how it appears when I run the app on Android:

[freakboy3742]

I suspect this may be an issue with the Android build of the locale module - @mhsmith any ideas what might be going on here?

[mhsmith]

It may be possible to fix this by calling locale.setlocale: I've added some notes to chaquo/chaquopy#1150.