Codes For Users To Upload and Download Images From Canvas

Helloo I'm new here and I need a little help on codes to allow users to download an image from a screen and upload it on another! It's urgent and I've been spending hours on it QAQ Please help thanks

You appear to be asking two questions?

  1. Upload and Download Images From Canvas ?
    From where to where? Android version ?

2.download an image from a screen and upload it on another?
From where to where?

Check out this guide:

And put this block on Screen2 to show the image created by Canvas on Screen1:

Screenshot