Kivy--export Window As Png On Android

I am trying to create a app on Android with which you fill in a few TextInputs and then give your signature on a marked space left for that, I have 2 buttons, one for clearing and

Solution 1:

The file is saved in the current directory, which you can access with e.g. os.path.realpath('.') from your script. This directory is not accessible to other applications. If you want to access the file from other applications, save it somewhere in the external storage dir (with Kivy, you can use App.user_data_dir).