I have backup rules for API ≤ 30 like this:
<?xml version="1.0" encoding="utf-8"?>
<full-backup-content>
<include domain="sharedpref" path="." />
<exclude domain="sharedpref" path="encrypted_shared_preferences.xml" />
<include domain="external" path="themes" />
<include domain="external" path="fonts" />
</full-backup-content>
While similar rules work without issues for API > 30, on emulators with API versions 24 and 27 (at least) only one of these folders is restored.
Judging from the logcat messages, I can see that the files are backed up correctly, but when I look at the restored files, some folders are missing. I ran some more tests, and I see the following. Here, on the left there are source folders, each with a file, and the according rules, and on the right the outcomes.
| Source | Outcome |
|---|---|
| ahoy fonts fonts2 themes |
ahoy |
| fonts fonts2 themes sausage |
sausage |
| fonts fonts2 themes sausage sausage2 |
sausage2 |
| amazing fonts fonts2 themes |
fonts fonts2 |
I know that there's a limit on how much you can backup, but all of the files here have the size of 0, so it must be something else.
Is there a way around this?