Android: can't write/read files in shared folders

[reuk]

We’ve now added support for the new storage APIs, which are required when targeting android 29+:

Read/Write files

After investigating, it looks like certain file locations (particularly shared locations on external storage) must now be accessed via the ContentResolver mechanism. Plain file paths don’t seem to work for these locations. This means that JUCE’s File type isn’t really suitable for interacting with such documents on Android - the document is represented by a URL rather than a filepath, and the supported behaviours don’t match those of standard files. To allow working with files on Android, I’ve …

@ZioGuido

Anyway, looks like the URI returned by the native browser isn’t properly translated into a file:// path.

Unfortunately, it seems that certain locations (especially shared locations) can no longer be accessed via a file path. Instead, files at these locations must be accessed via the ContentResolver mechanism, using a content:// URL returned from a native file chooser.