We open a C3 default project, and keep the default size. After we have our project opened, you need something to differentiate from the background I added a def...
the download browser function only works for hosted content, wrapped .apk doesn't work, as its not running in a browser. It could work in a .apk if you load the canvas snapshot app you created on a website, and inside the .apk for android you load it trough an iframe, which would call the browser object and features. Hope it helped you.