pause resume test

android.txt

title=pause resume test
author=GottaDiveIntoPython
orientation=sensor

main.py

from __future__ import print_function

from kivy.config import Config
Config.set('kivy', 'pause_on_minimize', 1)

from kivy.app import App
from kivy.uix.textinput import TextInput
from os.path import join as ospath_join, isfile as ospath_isfile
import io
import sys


def log(*args, **kwargs):
    print(*args, file=sys.stderr, **kwargs)


class TestApp(App):

    def build(self):
        return TextInput()

    def on_pause(self):
        log('on_pause()')
        self.save_session()
        return True

    def on_resume(self):
        log('on_resume()')

    def on_start(self):
        log('on_start()')
        self.restore_session()

    def on_stop(self):
        log('on_stop()')
        self.save_session()

    @property
    def savefilepath(self):
        return ospath_join(self.user_data_dir, 'savedata.txt')

    def save_session(self):
        with io.open(self.savefilepath, 'wt', encoding='utf-8') as writer:
            writer.write(self.root.text)

    def restore_session(self):
        path = self.savefilepath
        if not ospath_isfile(path):
            return
        with io.open(path, 'rt', encoding='utf-8') as reader:
            self.root.text = reader.read()


if __name__ == '__main__':
    TestApp().run()